It would be no exaggeration to say that we live in an age of renewed space exploration. In particular, the Moon has become the focal point of increasing attention in recent years. In addition to President Trump’s recent directive to NASA to return to the Moon, many other space agencies and private aerospace companies are planning their own missions to the lunar surface.
A good example is the Chinese Lunar Exploration Program (CLEP), otherwise known as the Chang’e Program. Named in honor of the ancient Chinese lunar goddess, this program has sent two orbiters and one lander to the Moon already. And later this year, the Chang’e 4 mission will begin departing for the far side of the Moon, where it will study the local geology and test the effects of lunar gravity on insects and plants.
The mission will consist of a relay orbiter being launched aboard a Long March 5 rocket in June of 2018. This relay will assume orbit around the Earth-Moon L2 Lagrange Point, followed by the launch of the lander and rover about six months later. In addition to an advanced suite of instruments for studying the lunar surface, the lander will also be carrying an aluminum alloy container filled with seeds and insects.
The Chinese Yutu rover, part of the Chang’e 3 mission, on the Moon. Credit: CNSA
As Zhang Yuanxun – chief designer of the container – told the Chongqing Morning Post (according to China Daily):
“The container will send potatoes, arabidopsis seeds and silkworm eggs to the surface of the Moon. The eggs will hatch into silkworms, which can produce carbon dioxide, while the potatoes and seeds emit oxygen through photosynthesis. Together, they can establish a simple ecosystem on the Moon.”
The mission will also be the first time that a mission is sent to an unexplored region on the far side of the Moon. This region is none other than the South Pole-Aitken Basin, a vast impact region in the southern hemisphere. Measuring roughly 2,500 km (1,600 mi) in diameter and 13 kilometers (8.1 mi) deep, it is the single-largest impact basin on the Moon and one of the largest in the Solar System.
This basin is also source of great interest to scientists, and not just because of its size. In recent years, it has been discovered that the region also contains vast amounts of water ice. These are thought to be the results of impacts by meteors and asteroids which left water ice that survived because of how the region is permanently shadowed. Without direct sunlight, water ice in these craters has not been subject to sublimation and chemical dissociation.
Since the 1960s, several missions have explored this region from orbit, including the Apollo 15, 16 and 17 missions, the Lunar Reconnaissance Orbiter (LRO) and India’s Chandrayaan-1 orbiter. This last mission (which was mounted in 2008) also involved sending the Moon Impact Probe to the surface to trigger the release of material, which was then analyzed by the orbiter.
Elevation data of the Moon, highlighting the low-lying regions of the South Pole-Aitken Basin. Credit: NASA/GSFC/University of Arizona
The mission confirmed the presence of water ice in the Aitken Crater, a discovery which was confirmed about a year later by NASA’s LRO. Thanks to this discovery, there have been several in the space exploration community who have stated that the South Pole-Aitken Basin would be the ideal location for a lunar base. In this respect, the Chang’e 4 mission is investigating the very possibility of humans living and working on the Moon.
Aside from telling us more about the local terrain, it will also assess whether or not terrestrial organisms can grow and thrive in lunar gravity – which is about 16% that of Earths (or 0.1654 g). Previous studies conducted aboard the ISS have shown that long-term exposure to microgravity can have considerable health effects, but little is known about the long-term effects of lower gravity.
The European Space Agency has also been vocal about the possibility of building an International Lunar Village in the southern polar region by the 2030s. Intrinsic to this is the proposed Lunar Polar Sample Return mission, a joint effort between the ESA and Roscosmos that will involve sending a robotic probe to the Moon’s South Pole-Aitken Basin by 2020 to retrieve samples of ice.
In the past, NASA has also discussed ideas for building a lunar base in the southern polar region. Back in 2014, NASA scientists met with Harvard geneticist George Church, Peter Diamandis (creator of the X Prize Foundation) and other parties to discuss low-cost options. According to the papers that resulted from the meeting, this base would exist at one of the poles and would be modeled on the U.S. Antarctic Station at the South Pole.
Artist’s concept of a possible “International Lunar Village” on the Moon, assembled using inflated domes and 3D printing. Credits: ESA/Foster + Partners
If all goes well for the Chang’e 4 mission, China intends to follow it up with more robotic missions, and an attempted crewed mission in about 15 years. There has also been talk about including a radio telescope as part of the mission. This RF instrument would be deployed to the far side of the Moon where it would be undistributed by radio signals coming from Earth (which is a common headache when it comes to radio astronomy).
And depending on what the mission can tell us about the South Pole-Aitken Basin (i.e. whether the water ice is plentiful and the radiation tolerable), it is possible that space agencies will be sending more missions there in the coming years. Some of them might even be carrying robots and building materials!
The Canadarm2 robotic arm is seen grappling the Orbital ATK S.S. Gene Cernan Cygnus resupply ship on Nov. 14, 2017 for berthing to the the International Space Station. Credit: NASA TV
The Canadarm2 robotic arm is seen grappling the Orbital ATK S.S. Gene Cernan Cygnus resupply ship on Nov. 14, 2017 for berthing to the the International Space Station. Credit: NASA TV
Soon thereafter at 5:04 a.m., Expedition 53 Flight Engineer Paolo Nespoli of ESA (European Space Agency) assisted by NASA astronaut Randy Bresnik successfully captured Orbital ATK’s Cygnus cargo freighter using the International Space Station’s 57.7-foot-long (17.6 meter-long) Canadarm2 robotic arm.
The station was orbiting 260 statute miles over the South Indian Ocean at the moment Nespoli grappled the S.S. Gene Cernan Cygnus spacecraft with the Canadian-built robotic arm.
Nespoli and Bresnik were working at a robotics work station inside the seven windowed domed Cupola module that offers astronauts the most expansive view outside to snare Cygnus with the robotic arms end effector.
The Cygnus cargo freighter – named after the last man to walk on the Moon – reached its preliminary orbit nine minutes after blasting off early Sunday atop the upgraded 230 version of the Orbital ATK Antares rocket from NASA’s Wallops Flight Facility in Virginia.
The flawless liftoff of the two stage Antares rocket took place shortly after sunrise Sunday at 7:19 a.m. EST, Nov. 12, rocket from Pad-0A at NASA’s Wallops Flight Facility in Virginia.
Orbital ATK Antares rocket blasts off from the ‘On-Ramp’ to the International Space Station on Nov. 12, 2017 carrying the S.S. Gene Cernan Cygnus OA-8 cargo spacecraft from Pad 0A at NASA’s Wallops Flight Facility in Virginia. Credit: Ken Kremer/kenkremer.com
Sunday’s spectacular Antares launch delighted spectators – but came a day late due to a last moment scrub on the originally planned Veteran’s Day liftoff, Saturday, Nov. 11, when a completely reckless pilot flew below radar into restricted airspace just 5 miles away from the launch pad – forcing a sudden and unexpected halt to the countdown under absolutely perfect weather conditions.
After a carefully choreographed series of intricate thruster firings to raise its orbit over the next two days, the Cygnus spacecraft on the OA-8 resupply mission for NASA arrived in the vicinity of the orbiting research laboratory.
With Cygnus firmly in the grip of the robots hand, ground controllers at NASA’s Mission Control at the Johnson Space Center in Texas, maneuvered the arm towards the exterior hull and berth the cargo ship at the Earth-facing port of the stations Unity module.
1st stage capture was completed at 7:08 a. EST Nov 14.
After driving in the second stage gang of bolts, hard mate and capture were completed at 7:15 a.m.
The station was flying 252 miles over the North Pacific in orbital night at the time of berthing.
The Cygnus spacecraft dubbed OA-8 is Orbital ATK’s eighth contracted cargo resupply mission with NASA to the International Space Station under the unmanned Commercial Resupply Services (CRS) program to stock the station with supplies on a continuing and reliable basis.
NASA TV provided live coverage of the rendezvous and grappling.
Including Cygnus there are now five visiting vehicle spaceships parked at the space station including also the Russian Progress 67 and 68 resupply ships and the Russian Soyuz MS-05 and MS-06 crew ships.
International Space Station Configuration. Five spaceships are parked at the space station including the Orbital ATK Cygnus after Nov. 14, 2017 arrival, the Progress 67 and 68 resupply ships and the Soyuz MS-05 and MS-06 crew ships. Credit: NASA
Cygnus will remain at the space station until Dec. 4, when the spacecraft will depart the station and deploy several CubeSats before its fiery re-entry into Earth’s atmosphere as it disposes of several tons of trash.
On this flight, the Cygnus OA-8 spacecraft is jam packed with its heaviest cargo load to date!
Altogether over 7,400 pounds of science and research, crew supplies and vehicle hardware launched to the orbital laboratory and its crew of six for investigations that will occur during Expeditions 53 and 54.
The S.S. Gene Cernan manifest includes equipment and samples for dozens of scientific investigations including those that will study communication and navigation, microbiology, animal biology and plant biology. The ISS science program supports over 300 ongoing research investigations.
Among the experiments flying aboard Cygnus are the coli AntiMicrobial Satellite (EcAMSat) mission, which will investigate the effect of microgravity on the antibiotic resistance of E. coli, the Optical Communications and Sensor Demonstration (OCSD) project, which will study high-speed optical transmission of data and small spacecraft proximity operations, the Rodent Research 6 habitat for mousetronauts who will fly on a future SpaceX cargo Dragon.
Cernan was commander of Apollo 17, NASA’s last lunar landing mission and passed away in January at age 82. He set records for both lunar surface extravehicular activities and the longest time in lunar orbit on Apollo 10 and Apollo 17.
The prime crew for the Apollo 17 lunar landing mission are: Commander, Eugene A. Cernan (seated), Command Module pilot Ronald E. Evans (standing on right), and Lunar Module pilot, Harrison H. Schmitt (left). They are photographed with a Lunar Roving Vehicle (LRV) trainer. Cernan and Schmitt used an LRV during their exploration of the Taurus-Littrow landing site. The Apollo 17 Saturn V Moon rocket is in the background. This picture was taken during October 1972 at Launch Complex 39A, Kennedy Space Center (KSC), Florida. Credit: Julian Leek
Under the Commercial Resupply Services-1 (CRS-1) contract with NASA, Orbital ATK will deliver approximately 66,000 pounds (30,000 kilograms) of cargo to the space station. OA-8 is the eighth of these missions.
The Cygnus OA-8 spacecraft is Orbital ATK’s eighth contracted cargo resupply mission with NASA to the International Space Station under the unmanned Commercial Resupply Services (CRS) program to stock the station with supplies on a continuing basis.
Beginning in 2019, the company will carry out a minimum of six cargo missions under NASA’s CRS-2 contract using a more advanced version of Cygnus.
Watch for Ken’s continuing Antares/Cygnus mission and launch reporting from on site at NASA’s Wallops Flight Facility, VA during the launch campaign.
Stay tuned here for Ken’s continuing Earth and Planetary science and human spaceflight news.
Launch of Apollo17, NASA’s final lunar landing mission, on December 7, 1972, as seen from the KSC press site. Credit: Mark and Tom Usciak
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Ken’s upcoming outreach events:
Learn more about the upcoming SpaceX Falcon 9 Zuma launch on Nov 16, 2017, upcoming Falcon Heavy and CRS-13 resupply launches, NASA missions, ULA Atlas & Delta launches, SpySats and more at Ken’s upcoming outreach events at Kennedy Space Center Quality Inn, Titusville, FL:
Nov 15, 17: “SpaceX Falcon 9 Zuma launch, ULA Atlas NRO NROL-52 spysat launch, SpaceX SES-11, CRS-13 resupply launches to the ISS, Intelsat35e, BulgariaSat 1 and NRO Spysat, SLS, Orion, Commercial crew capsules from Boeing and SpaceX , Heroes and Legends at KSCVC, GOES-R weather satellite launch, OSIRIS-Rex, Juno at Jupiter, InSight Mars lander, SpaceX and Orbital ATK cargo missions to the ISS, ULA Delta 4 Heavy spy satellite, Curiosity and Opportunity explore Mars, Pluto and more,” Kennedy Space Center Quality Inn, Titusville, FL, evenings
Portrait of NASA astronaut Gene Cernan and floral wreath displayed during the Jan. 18, 2017 Remembrance Ceremony at the Kennedy Space Center Visitor Complex, Florida, honoring his life as the last Man to walk on the Moon. Credit: Ken Kremer/kenkremer.comThe next Orbital ATK Cygnus supply ship was christened the SS John Glenn in honor of Sen. John Glenn, one of NASA’s original seven astronauts as it stands inside the Payload Hazardous Servicing Facility at NASA’s Kennedy Space Center. Credit: Ken Kremer/Kenkremer.com Orbital ATK’s eighth contracted cargo delivery flight to the International Space Station successfully launched at 7:19 a.m. EST on an Antares rocket from Pad 0A at NASA’s Wallops Flight Facility in Virginia, Sunday, Nov. 12, 2017 carrying the Cygnus OA-8 resupply spacecraft. Credit: Ken Kremer/kenkremer.comSunset launchpad view of Orbital ATK Antares rocket and Cygnus OA-8 resupply spaceship the evening before blastoff to the International Space Station on Nov. 11, 2017. Credit: Ken Kremer/kenkremer.com
The Marius Hills Skylight, as observed by the Japanese SELENE/Kaguya research team.
Image by: NASA/Goddard/Arizona State University
On October 5th, 2017, Vice President Mike Pence announced the Trump administration’s plan to return astronauts to the Moon. Looking to the long-term, NASA and several other space agencies are also intent on establishing a permanent lunar base there. This base will not only provide opportunities for lunar science, but will facilitate missions to Mars and beyond.
The only question is, where should such a base be built? For many years, NASA, the ESA and other agencies have been exploring the possibility of stable lava tubes as a potential site. According to new study by a team of international scientists, the presence of such a tube has now been confirmed in the Marius Hills region. This location is likely to be the site of future lunar missions, and could even be the site of a future lunar habitat.
In 2009, data provided by the Terrain Camera aboard JAXA’s SELENE spacecraft indicated the presence of three huge pits on the Moon. These pits (aka. “skylights”) were of particular interest since they were seen as possible openings to subsurface lava channels. Since then, the Marius Hills region (where they were found) has been a focal point for astronomers and planetary scientists hoping to confirm the existence of lava tubes.
Artist’s impression of a surface exploration crew investigating a typical, small lava tunnel, to determine if it could serve as a natural shelter for the habitation modules of a Lunar Base. Credit: NASA’s Johnson Space Center
Together, they examined data from the SELENE mission’s Lunar Radar Sounder (LRS) from locations that were close to the Marius Hills Hole (MHH) to determine if the region hosted stable lava tubes. Such tubes are a remnant from the Moon’s past, when it was still volcanically active. These underground channels are believed to be an ideal location for a lunar colony, and for several reasons.
For starters, their thick roofs would provide natural shielding from solar radiation, cosmic rays, meteoric impacts, and the Moon’s extremes in temperature. These tubes, once enclosed, could also be pressurized to create a breathable environment. As such, finding an entrance to a stable lava tube would the first step towards selecting a possible site for such a colony.
As Junichi Haruyama, a senior researcher at JAXA and one of the co-authors on the study, explained in a University of Purdue press release:
“It’s important to know where and how big lunar lava tubes are if we’re ever going to construct a lunar base. But knowing these things is also important for basic science. We might get new types of rock samples, heat flow data and lunar quake observation data.”
The city of Philadelphia is shown inside a theoretical lunar lava tube. A Purdue University team of researchers explored whether lava tubes more than 1 kilometer wide could remain structurally stable on the moon. Credit: Purdue University/courtesy of David Blair
Granted, the LRS was not specifically designed to detect lava tubes, but to characterize the origins of the Moon and its geologic evolution. For this reason, it did not fly close enough to the Moon to obtain extremely accurate information on the subsurface. Nevertheless, as SELENE passed near the Marius Hills Hole, the instrument picked up a distinctive echo pattern.
This pattern was characterized by a decrease in echo power followed by a large second echo peak. These two echoes correspond to radar reflections from the Moon’s surface, as well as the floor and ceiling of the open lava tube. When they analyzed this pattern, the research team interpreted it is evidence of a tube. They found similar echo patterns at several locations around the hole, which could indicate that there is more than one lava tube in the region.
To confirm their findings, the team also consulted data from NASA’s Gravity Recovery and Interior Laboratory (GRAIL) mission. Consisting of two spacecraft, this collaborative effort collected high-quality data on the Moon’s gravitational field between 2011 and 2012. By using GRAIL data that identified mass deficits under the surface, which are evidence of caverns, the team was able to narrow down their search.
Jay Melosh, a GRAIL co-investigator and Distinguished Professor of Earth, Atmospheric and Planetary Sciences at Purdue University, was also a co-author on the paper. As he explained:
“They knew about the skylight in the Marius Hills, but they didn’t have any idea how far that underground cavity might have gone. Our group at Purdue used the gravity data over that area to infer that the opening was part of a larger system. By using this complimentary technique of radar, they were able to figure out how deep and high the cavities are.”
Arched passages in the main tube show the classic lava tube shape. The floor was the crust on a former lava lake that fell inward as it drained from beneath. Credit: Dave Bunnell/Under Earth Images/Wikipedia Commons
On Earth, stable lava tubes have been found that can extend for dozens of kilometers. To date, the longest and deepest to be discovered is the Kazumura Cave in Hawaii, which is over a kilometer (3,614 feet) deep and 65.5 km (40.7 mi) long. On the Moon, however, lava tubes are much larger, due to the fact that the Moon has only a fraction of the Earth’s gravity (0.1654 g to be exact).
For a lava tube to be detecting using gravity data, it would need to be several kilometers in length and at least one kilometer in height and width. Since the tube in Marius Hills was detectable, it is likely big enough to house a major city. In fact, during a presentation at the 47th Lunar and Planetary Conference, researchers from Purdue University showed GRAIL data that indicated how the tube beneath the MHH could be large enough to house Philadelphia.
This most recent study was also the subject of a presentation at the 48th Lunar and Planetary Conference. Similar evidence of possible stable lava tubes in the Sea of Tranquility was also obtained by the Lunar Reconnaissance Orbiter (LRO) back in 2010. However, this latest combination of radar and gravity data has provided the clearest picture yet of what a stable lava tube looks like.
Similar evidence of lava tubes has also been discovered on Mars, and possible even Mercury. On Mars in particular, chains of pit craters, broad lava fans, skylights and partially collapsed lava tubes all indicate the presence of stable tubes. Based on this latest study, future mission to the Red Planet (which could include the creation of a habitat) might also entail the investigation of these features.
In fact, lava tubes could become the means through which a human presence is established throughout the Solar System someday!
Vice President Mike Pence delivers opening remarks during the National Space Council's first meeting, Thursday, Oct. 5, 2017 at the Smithsonian National Air and Space Museum's Steven F. Udvar-Hazy Center in Chantilly, Va. Credits: NASA
Looking to the future of space exploration, NASA’s priorities are sometimes subject to change. In 2004, the Bush administration released it’s “Vision for Space Exploration“, which called for the development of rockets that would return astronauts to the Moon. This policy was later replaced by the NASA Authorization Act of 2010, which outlined plans to send humans to an asteroid by 2025 and to Mars in the 2030s.
Earlier today, on Thursday, October 5th, Vice President Mike Pence and several members of the Trump administration announced that their priorities have shifted once again. Instead of proceeding with NASA’s proposed “Journey to Mars“, the administration has set its sights on once again mounting crewed missions to the Moon and establishing a permanent presence on the lunar surface.
The announcement came during the inaugural meeting of the National Space Council, the newly-reestablished executive group that will be guiding US space policy in the coming years. Originally established in 1989 by then-president George H.W. Bush (and disbanded in 1993 by the Clinton administration), this council served the same purpose as the National Aeronautics and Space Council – which oversaw space policy between 1958 and 1973.
Acting NASA Administrator Robert Lightfoot, center, along with Deputy Chief Technology Officer of the United States Michael Kratsios, left, and Director of National Intelligence Daniel Coats, right. Credits: NASA
The meeting, titled “Leading the Next Frontier: An Event with the National Space Council“, took place at the Smithsonian National Air and Space Museum’s (NASM) Steven F. Udvar-Hazy Center in Chantilly, Virginia. The meeting was chaired by Vice President Mike Pence with the participation of NASA Administrator Robert Lightfoot, and was attended by Trump Administration cabinet members, senior officials, and aerospace industry leaders.
During the course of the meeting, which was live-streamed, Vice President Mike Pence laid out the administration’s plans for returning astronauts to the Moon. Emphasizing the need to restore NASA and America’s leadership in space, Pence compared the current situation to the early years of the Space Race and the crowing achievement that was the Apollo 11 mission. As he said:
“It is altogether fitting that we chose this week for the first meeting of the National Space Council. Yesterday marked the 60th anniversary of Sputnik, that 184-pound satellite that changed the course of history. On that day, six decades ago yesterday, the race for space began and the then-Soviet Union took an early lead. But the sight of that light blinking across that October sky spurred America to action. We refused to accept a future in space written by the enemies of freedom, and so the United States of America vowed to claim our rightful place as the undisputed leader in the exploration of the heavens. And twelve years later, with “one giant leap for mankind”, America led in space.
Moving to the present, Pence indicated that the reestablishment of he National Space Council would put an end to the ways in which space exploration has stalled in recent decades. He also indicated how a return to the Moon – a goal which diminished in important in the post-Apollo era – would recapture the spirit of the past and reinvigorate modern space exploration.
Lunar footprint left by the Apollo astronauts. Credit: NASA
As he expressed during the course of the meeting, the way space exploration has stalled is in part due to the way in which the Moon (as a destination) has diminished in importance:
“Our struggle to define the direction and purpose of America’s space program dates back decades to the post-Apollo period. We had just won the race to the Moon and suddenly the question became, ‘What should we do? Where should we go next?’ In the debate that followed, sending Americans to the Moon was treated as a triumph to be remembered, but not repeated. Every passing year that the Moon remained squarely in the rear-view mirror further eroded our ability to return to the lunar domain and made it more likely that we would forget why we ever wanted to go in the first place.”
A renewed mission to the Moon, claimed Pence, will put an end to decades in which not a single NASA astronaut has ventured beyond Low Earth Orbit. He further indicated how after the retirement of the Space Shuttle Program, the US has been dependent on Russia to ferry astronauts to the International Space Station. He also voiced criticism for the Obama administration, claiming that it chose “capitulation” when it came to the space race.
While this new policy technically represents a break from the policy of the Obama administration, and a return to the policy of the Bush administration, Pence emphasized that returning to the Moon would be a stepping stone towards an eventual crewed mission to the Red Planet. This announcement also put an end to months of ambiguity regarding the Trump administration’s space policy.
Members of the National Space Council seen during the council’s first meeting on Thursday, Oct. 5, 2017 at the Smithsonian National Air and Space Museum’s Steven F. Udvar-Hazy Center in Chantilly, Va. Credit: NASA/Joel Kowsky
In the past, VP Pence has spoken about the need to return to the Moon and puts boots on Mars, but nothing definitive was said. This ambiguity, it is worth noting, has also been a source of anxiety for those at NASA, who were unsure about the future budget environment. And while this meeting did indicate that the Trump administration has a policy, many aspects of it were already in place before the administration took office.
After the meeting concluded, acting NASA Administrator Robert Lightfoot spoke of the results in a NASA press statement. In reference to the direction VP Pence had indicated for the agency, he said the following:
“Specifically, NASA has been directed to develop a plan for an innovative and sustainable program of exploration with commercial and international partners to enable human expansion across the solar system, returning humans to the Moon for long-term exploration and utilization, followed by human missions to Mars and other destinations.”
Much of the details discussed at the meeting were already established as early as last September. It was at this time that the NASA Transition Authorization Act of 2016, a provisional measure that guaranteed short-term stability for the agency by allocating $19.5 billion in funding for NASA for fiscal year 2017. Intrinsic to the Act was the cancellation for the NASA’s Asteroid Robotic Redirect Missions (ARRM) in favor of a more cost-effective alternative.
Artist’s illustration of a possible astronaut mission to an asteroid. Credit: NASA Human Exploration Framework Team
As Lightfoot indicated, this would still be the case under the current administration’s plan:
“The recommendation to the president would modify the existing National Space Policy to provide focus and direction to some of NASA’s current activities and plans, and remove a previous guideline that NASA should undertake a human mission to an asteroid as the next human spaceflight milestone beyond low-Earth orbit.”
Lighfoot also reiterated what Pence said during the meeting, how renewed missions to the Moon would ultimately assist NASA’s efforts to mount crewed missions to Mars. These included the importance of cis-lunar space to the exploration of both the Moon and the Mars, as well as its use as a proving ground for future mission to Mars and beyond in the Solar System.
“Based on a number of conversations I’ve had with the council,” he said, “we have highlighted a number of initiatives underway in this important area, including a study of an orbital gateway or outpost that could support a sustained cadence of robotic and human missions, as well as ensuing human missions to the lunar and Mars surfaces, and other destinations.”
Artist illustration of the habitation module aboard the Deep Space Gateway. Credit: Lockheed Martin
While this latest announcement does confirm what many have suspected for some time – that the Trump administration would prioritize lunar exploration – much ambiguity remains. While Pence emphasized that the re-establishment of the NSC was intrinsic to restoring American leadership in space, very little appears to have changed since the NASA Transition Authorization Act of 2016.
What’s more, despite Pence’s claims of “capitulation” on behalf of the Obama administration, much of the current administration’s policy represents a continuation of the NASA Authorization Act of 2010. These include the use of the Space Launch System (SLS), the Orion spacecraft, and the restoration of domestic launch capability. In short, much of the Trump administration’s plans to restore American leadership in space are piggybacking on the accomplishments of the Obama administration.
Beyond that, the creation of the Deep Space Gateway appears unaffected, since its existence is central to both renewed mission to the Moon and for crewed missions to Mars. And the long-term plan for the exploration of Mars appear to still be intact. So in many ways, this latest announcement is not much in the way of news, but also good news.
When it comes to organizations like NASA and space exploration in general, continuity is not only preferable, but necessary. And in the meantime, be sure to check out the live coverage of the event:
The planetary lineup at dawn from September 12th. Image credit and copyright: Alan Dyer (AmazingSky.com)
The planetary lineup at dawn (minus the Moon) from September 12th. Image credit and copyright: Alan Dyer (AmazingSky.com).
Following the Moon and wondering where are the fleeting inner solar system planets are this month?
While Jupiter and Saturn sink into the dusk on the far side of the Sun this month, the real action transpires in the dawn sky in mid-September, with a complex set of early morning conjunctions, groupings and occultations.
First, let’s set the stage for the planetary drama. Mercury just passed greatest elongation 18 degrees west of the Sun on September 12th.
The action warms up with a great pre-show on the morning of Saturday, September 16th, when the closest conjunction of two naked eye planets for 2017 occurs, as Mercury passes just 3′ north of Mars. The conjunction occurs at 16:00 UT, favoring the western Pacific region in the dawn hours. The pair is just 17 degrees from the Sun. As mentioned previously, this is the closest conjunction of two naked eye planets in 2017, so close the two will seem to merge to the naked eye and make a nice split with binoculars. This is also one of the first good chances to spy Mars for this apparition, fresh off of its solar conjunction on July 27th, 2017. Mars is now headed towards a favorable opposition next summer on July 27th, 2018, one that’s very nearly as favorable as the historic grand opposition of 2003.
Mars shines at magnitude +1.8 on Saturday morning with a disk 3.6” across, while Mercury shines at magnitude +0.05 with a 64% illuminated disk 6.4” across. Mars is actually 389 million km (2.6 AU) from the Earth this weekend, while Mercury is 158 million km (1.058 AU) distant.
The view looking east on the morning of September 17th. Stellarium
Follow that planet, as Mars also makes a close (12′) pass near Venus on October 5th. At the eyepiece, Venus will look like it has a large moon, just like the Earth!
Think this pass is close? Stick around until August 10th, 2079 and you can actually see Mercury occult (pass in front of) Mars… our cyborg body should be ready to download our consciousness into by then.
Mark your calendars: Mercury occults Mars in 2079. Stellarium
The waning crescent Moon joins the view on Monday, September 18th, making a spectacular series of passes worldwide as it threads its way through the stellar-planetary lineup. Occultations involving the waning Moon are never as spectacular as those involving the waxing Moon, as the bright limb of the Moon leads the way for ingress instead of the dark edge. The best sight to behold will be the sudden reappearance of the planet of star (egress) from behind the waning crescent Moon’s dark limb.
The sky looking east on the morning of September 18th. Stellarium
First up is an occultation of Venus on September 18th centered on 00:55 UT. Unfortunately, this favors the eastern Indian Ocean at dawn, though viewers in Australia and New Zealand can watch the occultation under post dawn daytime skies. The pair is 22 degrees west of the Sun, and the Moon is two days from New during the event. Shining at magnitude -4, it’s actually pretty easy to pick out Venus near the crescent Moon in the daytime. Observers worldwide should give this a try on the 18th as well… folks are always amazed when I show them Venus in the daytime. The last time the Moon occulted Venus was September 3rd, 2016 and the two won’t cross paths again until February 16th, 2018.
The footprint of the occultation of Venus by the Moon. Occult 4.2
Next up, the Moon occults the +1.4 magnitude star Regulus on the 18th at 4:56 UT. Observers across north-central Africa are best placed to observe this event. This is the 11th occultation of Regulus by the Moon in a series of 19, spanning December 2016 to April 2018.
The occultation of Regulus by the Moon. Occult 4.2
The brightest star in the constellation Leo, Regulus is actually 79 light years distant.
Next up, the dwindling waning crescent Moon meets the Red Planet Mars and occults it for the western Pacific at 19:42 UT. Shining at magnitude +1.8 low in the dawn sky, Mars is currently only 3.6” in size, a far cry from its magnificent apparition next summer when it will appear 24.3” in size… very nearly the largest it can appear from the Earth.
The occultation of Mars by the Moon. Occult 4.2
And finally, the slim 2% illuminated Moon will occult the planet Mercury on September 18th centered on 23:21 UT.
The occultation of Mercury by the Moon. Occult 4.2
Mercury occultations are tough, as the planet never strays very far from the Sun. The only known capture I’ve seen was out of Japan back in 2013:
This week’s occultation favors southeast Asia at dawn, and the pair is only 16 degrees west of the Sun. Mercury is gibbous 74% illuminated and 6” in size during the difficult occultation.
We just miss having a simultaneous “multiple occultation” this week. The Moon moves at the span of its half a degree size about once every hour with respect to the starry background, meaning an occultation must occur about 60 minutes apart for the Moon to cover two planets or a planet and a bright star at the same time, a rare once in a lifetime event indeed. The last time this transpired, the Moon covered Venus and Jupiter simultaneously for observers on Ascension Island on the morning of April 23rd 1998.
When is the next time this will occur? We’re crunching the numbers as we speak… watch this space!
Looking into next week, the Moon reaches New phase on Wednesday, September 20th at 5:31 UT/1:31 AM EDT, marking the start of lunation 1172. Can you spy the razor thin Moon Wednesday evening low to the west? Sighting opportunities improve on Thursday night.
Don’t miss this weekend’s dance of the planets in the early dawn sky, a great reason to rise early.
Read about conjunctions, occultations, tales of astronomy and more in our free guide to the Top 101 Astronomical Events for 2017 from Universe Today.
Chris Hadfield recently explained how humanity should create a Moon base before attempting to colonize Mars. Credit: Foster + Partners is part of a consortium set up by the European Space Agency to explore the possibilities of 3D printing to construct lunar habitations.
Credit: ESA/Foster + Partners
In the coming decades, NASA has some rather bold plans for space exploration. By the 2030s, they hope to mount their “Journey to Mars“. a crewed mission that will see astronauts traveling beyond Earth for the first time since the Apollo era. At the same time, private companies and organizations like SpaceX and MarsOne are hoping to start colonizing Mars within a decade or so.
According to Chris Hadfield, these mission concepts are all fine and good. But as he explained in a recent interview, our efforts should be focused on renewed exploration of the Moon and the creation of a lunar settlement before we do the same for Mars. In this respect, he is joined by organizations like the European Space Agency (ESA), Roscosmos, the Chinese National Space Agency (CNSA), and others.
When it comes to establishing a base on the Moon, the benefits are rather significant. For starters, a lunar outpost could serve as a permanent research base for teams of astronauts. In the same respect, it would present opportunities for scientific collaboration between space agencies and private companies – much in the same way the International Space Station does today.
On top of that, a lunar outpost could serve as a refueling station, facilitating missions deeper into the Solar System. According to estimates prepared by NexGen Space LLC (a consultant company for NASA), such a base could cut the cost of any future Mars missions by about $10 billion a year. Last, but not least, it would leverage key technologies that have been developed in recent years, from reusable rockets to additive manufacturing (aka. 3D printing).
And as Chris Hadfield stated in an interview with New Scientist, there are also a number of practical reasons for back to the Moon before going to Mars – ranging from distance to the development of “space expertise”. For those interested in science and space exploration, Chris Hadfield has become a household name in recent years. Before becoming an astronaut, he was a pilot with the Royal Canadian Air Force (RCAF) and flew missions for NORAD.
After joining the Canadian Space Agency (CSA) in 1992, he participated in two space missions – STS-74 and STS-100 in 1995 and 2001, respectively – as a Mission Specialist. These missions involved rendezvousing with the Russian space station Mir and the ISS. However, his greatest accomplishment occurred in 2012, when he became the first Canadian astronaut to command an ISS mission – Expedition 35.
During the course of this 148-day mission, Hadfield attracted significant media exposure due to his extensive use of social media to promote space exploration. In fact, Forbes described Hadfield as “perhaps the most social media savvy astronaut ever to leave Earth”. His promotional activities included a collaboration with Ed Robertson of The Barenaked Ladies and the Wexford Gleeks, singing “Is Somebody Singing?“(I.S.S.) via Skype.
Canadian astronaut Chris Hadfield, the first Canadian to serve as commander of the ISS. Credit: CTV
The broadcast of this event was a major media sensation, as was his rendition of David Bowie’s “Space Oddity“, which he sung shortly before departing the station in May 2013. Since retiring from the Canadian Space Agency, Hadfield has become a science communicator and advocate for space exploration. And when it comes to the future, he was quite direct in his appraisal that the we need to look to the Moon first.
According to Hadfield, one of the greatest reasons for establishing a base on the Moon has to do with its proximity and the fact that humans have made this trip before. As he stated:
“With long-haul space exploration there is a whole smorgasbord of unknowns. We know some of the threats: the unreliability of the equipment, how to provide enough food for that length of time. But there are countless others: What are the impacts of cosmic rays on the human body? What sort of spacecraft do you need to build? What are the psychological effects of having nothing in the window for months and months? And going to a place that no one has ever been before, that can’t be discounted.”
In that, he certainly has a point. At their closest – i.e. when it is at “opposition with the Sun”, which occurs approximately every two years – Mars and Earth are still very far from each othre. In fact, the latest closest-approach occurred in 2003, when the two planets were roughly 56 million km (33.9 million miles) apart. This past July, the planets were again at opposition, where they were about 57.6 million km (35.8 million miles) apart.
Using conventional methods, it would take a mission between 150 and 300 days to get from the Earth to Mars. Whereas a more fuel-efficient approach (like ion engines) would cost less but take much longer, a more rapid method like chemical rockets would could cost far more. Even with Nuclear Thermal Propulsion (NTP) or the Variable Specific Impulse Magnetoplasma Rocket (VASIMR) concept, the journey could still take 5 to 7 months.
During this time, astronauts would not only be subjected to a great deal of cosmic radiation, they would have to contend with the affects of microgravity. As studies that have been conducted aboard the ISS that have shown, long-term exposure to a microgravity environment can lead to losses in bone density, muscular atrophy, diminished eyesight, and organ damage.
Recent studies have also shown that exposure to radiation while on the surface of Mars would be quite significant. During its journey to Mars, the Curiosity rover recorded that it was subjected to average dose of 1.8 millisieverts (mSv) per day from inside its spaceship – the Mars Science Laboratory. During its first three hundred days on the surface, it was exposed to about 0.67 millisieverts (mSv) per day.
This is about half and one-fifth (respectively) of what people are exposed to during an average here on Earth. While this falls outside of NASA’s official guidelines, it is still within the guidelines of other space agencies. But to make matter worse, a new study from the University of Nevada, Las Vegas, concluded that exposure to cosmic rays could cause cell damage that would spread to other cells in the body, effectively doubling the risk of cancer.
The risks of going to the Moon, in contrast, are easy to predict. Thanks to the Apollo missions, we know that it takes between two and three days to travel from the Earth to the Moon. The Apollo 11 mission, for example, launched from the Cape Kennedy on July 16th, 1969, and arrived in lunar orbit by July 19th, 1969 – spending a total of 51 hours and 49 minutes in space. Astronauts conducting this type of mission would therefore be subject to far less radiation.
Artist’s impression of a lunar base created with 3-d printing techniques. Credits: ESA/Foster + Partners
Granted, the surface of the Moon is still exposed to significant amounts of radiation since the Moon has no atmosphere to speak of. But NASA estimates that walls which are 2.5 meters in thickness (and made from lunar regolith) will provide all the necessary shielding to keep astronauts or colonists safe. Another good reason to go to the Moon first, according to Hadfield, is because expertise in off-world living is lacking.
“There are six people living on the International Space Station, and we have had people there continuously for nearly 17 years,” he said. “But the reality is we have not yet figured out how to live permanently off-planet. So I think if we follow the historically driven pattern then the moon would be first. Not just to reaffirm that we can get there, but to show that we can also live there.”
But perhaps the best reason to settle the Moon before moving onto Mars has to do with the fact that exploration has always been about taking the next step, and then the next. One cannot simply leap from one location to the next, and expect successful results. What are required is baby-steps. And in time, sufficient traction can be obtained and the process will build up speed, enabling steps that are greater and more far-reaching. Or as Hadfield put it:
“For tens of thousands of years humans have followed a pattern on Earth: imagination, to technology-enabled exploration, to settlement. It’s how the first humans got to Australia 50,000 or 60,000 years ago, and how we went from Yuri Gagarin and Alan Shepherd orbiting Earth to the first people putting footprints on the moon, to people living in orbit.
Based on this progression, one can therefore see why Hadfield and others beleive that the next logical step is to return to the Moon. And once we establish a foothold there, we can then use it to launch long-range missions to Mars, Venus, and beyond. Incremental steps that eventually add up to human beings setting foot on every planet, moon, and larger body in the Solar System.
On the subject of lunar colonization, be sure to check out our series on Building a Moon Base, by Universe Today’s own Ian O’Neill.
Orbital ATK Minotaur IV rocket streaks to orbit after blastoff darting in and out of clouds to deliver the ORS-5 space situational awareness and debris tracking satellite to equatorial orbit for the U.S. Air Force at 2:04 a.m. EDT on August 26, 2017 from Cape Canaveral Air Force Station, FL – as seen from 5th Space Launch Squadron building roof on CCAFS. Credit: Ken Kremer/kenkremer.com
ICBM derived Minotaur IV overnight launch of the ORS-5 space situational awareness and debris tracking satellite for the U.S. Air Force at 2:04 a.m. EDT on August 26, 2017 from Cape Canaveral Air Force Station in Florida. Credit: Ken Kremer/kenkremer.com
CAPE CANAVERAL AIR FORCE STATION, FL — A Cold War-era derived Peacekeeper ICBM missile formerly armed with multiple nuclear warheads and now modified as a payload orbiter successfully launched an urgently needed space situational awareness and space junk tracking satellite to equatorial orbit overnight this morning, Aug. 26, for the U.S. military from the Florida Space Coast.
Following a nearly 3 hour delay due to day long dismal weather causing locally heavy rain storms and lighting in central Florida, an Orbital ATK Minotaur IV rocket carrying the ORS-5 tracking satellite for the USAF finally lifted off in the wee hours Saturday morning, Aug. 26 at 2:04 a.m. EDT from Cape Canaveral Air Force Station in Florida.
The five stage solid fueled Minotaur IV roared rapidly off Space Launch Complex 46 (SLC-46) on a half million pounds of thrust and quickly disappeared into the clouds from the perspective of our nearby media launch viewing site on this inaugural launch of the rocket from the Cape.
Check back here to see the expanding gallery of launch photos and videos recorded by myself and space journalist colleagues!
Orbital ATK Minotaur IV rocket streaks to orbit after blastoff carrying the ORS-5 space situational awareness and debris tracking satellite to orbit for the military at 2:04 a.m. EDT on August 26, 2017 from pad 46 on Cape Canaveral Air Force Station in Florida. Credit: Julian Leek
The gap filling ORS-5 space surveillance satellite is a low cost mission technology demonstration mission that will track orbiting threats for the U.S. Air Force – and offered a thrilling nighttime launch experience to those who stayed awake and braved the post midnight time slot.
The converted ICBM motor ignition produced a flash of extremely bright light that briefly turned night into day. The maiden Minotaur from the Cape gushed intensely at liftoff and left a huge exhaust trailing in its wake as it accelerated to orbit.
Orbital ATK Minotaur IV rocket streaks to orbit after blastoff darting in and out of clouds to deliver the ORS-5 space situational awareness and debris tracking satellite to equatorial orbit for the U.S. Air Force at 2:04 a.m. EDT on August 26, 2017 from Cape Canaveral Air Force Station, FL – as seen from 5th Space Launch Squadron building roof on CCAFS. Credit: Ken Kremer/kenkremer.com
The ORS-5 is a single satellite constellation with a primary mission to provide space situational awareness of the geosynchronous orbit belt for Combatant Commanders’ urgent needs, according to Brig. Gen. Wayne Monteith, 45th Space Wing commander and mission Launch Decision Authority at Cape Canaveral Air Force Station
The ORS-5 mission, which stands for Operationally Responsive Space-5, marks the first launch of a Minotaur IV rocket from Cape Canaveral Air Force Station and the first use of SLC-46 since 1999.
SLC-46 is operated under license by Space Florida, which invested more than $6 million dollars of state funds into pad upgrades and renovations.
Orbital ATK Minotaur IV rocket streaks to orbit after blastoff carrying the ORS-5 space situational awareness and debris tracking satellite to orbit for the military at 2:04 a.m. EDT on August 26, 2017 from pad 46 on Cape Canaveral Air Force Station in Florida. Credit: Michael Seeley/WeReportSpace
The ORS-5 satellite built for the USAF Operationally Responsive Space Office will provide the US military with space-based surveillance and tracking of other satellites both friend and foe as well as space debris in geosynchronous orbit, 22,236 miles above the equator.
ORS-5 is like a telescope wrapped in a satellite that will aim up to seek threats from LEO to GEO using cameras and spectrometer sensors.
Also known as SensorSat, ORS-5 is designed to scan for other satellites and debris to aid the U.S. military’s tracking of objects in geosynchronous orbit for a minimum of three years and possibly longer if its on board sensor and spacecraft systems continue functioning in a useful and productive manner.
The Minotaur IV is a five stage rocket comprised of three stages of a decommissioned Cold War-era Peacekeeper Intercontinental Ballistic Missile (ICBM) that has been modified to add two additional Orbital ATK Orion 38 solid rocket motors for the upper stages.
Approximately 28 minutes after liftoff at 2:04 a.m. EDT, the Minotaur IV deployed the ORS-5 satellite into its targeted low inclination orbit 372 miles (599 kilometers) above the earth, Orbital ATK confirmed.
“From this orbit, ORS-5 will deliver timely, reliable and accurate space situational awareness information to the United States Strategic Command through the Joint Space Operations Center.”
Orbital ATK Minotaur IV rocket soars to orbit after blastoff darting artfully in and out of clouds to deliver the ORS-5 space situational awareness and debris tracking satellite to orbit for the U.S. Air Force at 2:04 a.m. EDT on August 26, 2017 from Cape Canaveral Air Force Station in Florida. Credit: Ken Kremer/kenkremer.com
“This was our first Minotaur launch from Cape Canaveral Air Force Station, demonstrating the rocket’s capability to launch from all four major U.S. spaceports,” said Rich Straka, Vice President and General Manager of Orbital ATK’s Launch Vehicles Division.
ICBM derived Minotaur IV overnight launch of the ORS-5 space situational awareness and debris tracking satellite for the U.S. Air Force at 2:04 a.m. EDT on August 26, 2017 from Cape Canaveral Air Force Station in Florida. Credit: Ken Kremer/kenkremer.com
This Minotaur IV rocket is a retired Cold War-era ICBM missile once armed with nuclear warheads aimed at the former Soviet Union that can now launch satellites for purposes other than offensive nuclear war retaliation.
So on the event of a nuclear first or retaliatory strike, this is how the world could potentially end in utter destruction and nuclear catastrophy.
To get an up-close feeling of the sounds and fury watch this Minotaur IV/ORS-5 launch video compilation from colleague Jeff Seibert from our media launch viewing site from the roof of the 5th Space Launch Squadron building on Cape Canaveral Air Force Station, FL.
Video Caption: Orbital ATK launch of Minotaur ORS 5 at 2:04 a.m. EDT on Aug. 26, 2017. None of the videos are sped up, it really takes off that fast. The solid fuel Peacekeeper missile segments were repurposed to launch the ORS-5 satellite from Launch Complex 46 on CCAFS., Fl. Credit: Jeff Seibert
Overall the ORS-5 launch was the 26th blastoff in Orbital ATK’s Minotaur family of launch vehicles which enjoy a 100% success rate to date.
Today’s launch was the 6th for the Minotaur IV version.
“With a perfect track record of 26 successful launches, the Minotaur family has proven to be a valuable and reliable asset for the Department of Defense,” said Straka.
“Orbital ATK has launched nearly 100 space launch and strategic rockets for the U.S. Air Force,” said Scott Lehr, President of Orbital ATK’s Flight Systems Group. “We’re proud to be a partner they can count on.”
Orbital ATK Minotaur IV rocket streaks to orbit through low hanging clouds that instantly become brightly illuminated as the booster engines flames pass through, while leaving towering exhaust plume in its wake. The mission carried the ORS-5 satellite tracker to equatorial orbit for the U.S. Air Force at 2:04 a.m. EDT on August 26, 2017 from Cape Canaveral Air Force Station in Florida. Credit: Ken Kremer/kenkremer.com
The past two weeks have been a super busy time at the Kennedy Space Center and Cape Canaveral. This morning’s post midnight launch was the third in just 11 days – and the second in a week!
A ULA Atlas V launched the NASA TDRS-M science relay satellite last Friday, Aug 18. And a SpaceX Falcon 9 launched the Dragon CRS-12 cargo resupply mission to the International Space Station (ISS) on Monday, Aug. 14.
“The ORS-5 Minotaur IV launch was the true epitome of partnership,” Gen. Monteith said.
“A collaborative effort between multiple mission partners, each group came together flawlessly to revolutionize how we work together on the Eastern Range. Teamwork is pivotal to making us the ‘World’s Premier Gateway to Space’ and I couldn’t be prouder to lead a Wing that not only has launched over a quarter of the world’s launches this year, but also three successful, launches from three different providers, in less than two weeks.”
ORS-5 was designed and built by Massachusetts Institute of Technology’s Lincoln Laboratory facility in Lexington, Massachusetts at a cost of $49 million.
The ORS-5 or SensorSat satellite will provide the US military with space-based surveillance and tracking of other satellites both friend and foe and space debris in geosynchronous orbit 22,236 miles above the equator. Credit: MIT Lincoln Laboratory
In July 2015 the U.S. Air Force’s Operationally Responsive Space (ORS) Office awarded Orbital ATK a $23.6 million contract to launch the ORS-5 SensorSat on the Minotaur IV launch vehicle.
ORS-5/SensorSat was processed for launch and encapsulation inside the 2.3 meter diameter payload fairing at Astrotech Space Operations processing facility in Titusville, Florida.
Orbital ATK Minotaur IV rocket streaks to orbit after blastoff darting in and out of clouds to deliver the ORS-5 space situational awareness and debris tracking satellite to equatorial orbit for the U.S. Air Force at 2:04 a.m. EDT on August 26, 2017 from Cape Canaveral Air Force Station, FL – as seen from 5th Space Launch Squadron building roof on CCAFS. Credit: Ken Kremer/kenkremer.comOrbital ATK Minotaur IV rocket streaks to orbit after blastoff darting in and out of clouds to deliver the ORS-5 space situational awareness and debris tracking satellite to equatorial orbit for the U.S. Air Force at 2:04 a.m. EDT on August 26, 2017 from Cape Canaveral Air Force Station, FL – as seen from 5th Space Launch Squadron building roof on CCAFS. Credit: Ken Kremer/kenkremer.com
Watch for Ken’s continuing onsite Minotaur IV ORS-5, TDRS-M, CRS-12, and NASA and space mission reports direct from the Kennedy Space Center and Cape Canaveral Air Force Station, Florida.
Stay tuned here for Ken’s continuing Earth and Planetary science and human spaceflight news.
Orbital ATK Minotaur IV rocket streaks to orbit through low hanging clouds that instantly illuminate as the booster engines flames pass through. This first Minotaur launch from the Cape carried the ORS-5 satellite tracker to equatorial orbit for the U.S. Air Force at 2:04 a.m. EDT on August 26, 2017 from Cape Canaveral Air Force Station in Florida. Credit: Ken Kremer/kenkremer.comOrbital ATK Minotaur IV rocket description. Credit: Orbital ATK/USAFMinotaur IV ORS-5 mission patch
Solar corona and prominences during the total solar eclipse across America on Monday, August 21, 2017, as seen from Santee, South Carolina and 4.8 miles from the centerline. Credit: Ken Kremer/kenkremer.com
Solar corona and prominences during the total solar eclipse across America on Monday, August 21, 2017, as seen from Santee, South Carolina and 4.8 miles from the centerline. Credit: Ken Kremer/kenkremer.com
SANTEE, SOUTH CAROLINA – Witnessing ‘Totality’ during Monday’s ‘Great American Solar Eclipse’ was a truly mesmerizing experience far beyond anything I imagined and something I will never forget -That’s a sentiment shared by millions upon millions of fellow gushing spectators.
I was stationed in Santee, South Carolina, near Lake Marion and close to the centerline of Totality, along with space journalist friend and colleague Jeff Seibert. And we could not have asked for clearer skies to enjoy this awesome natural event made possible by a uniquely rare confluence of miraculous celestial mechanics.
Check out our expanding gallery of personal photos and videos as well as many more gathered from friends and colleagues herein.
Totality was mesmerizing! Although I fully hoped to see a science spectacle (weather permitting) – I wasn’t really prepared for the majesty of the ‘coronal fire’ of Totality on display in the sky that started with what seemed like a startling electric flash – – The sun was alive far beyond anything I imagined beforehand. An out of body experience truly beyond my wildest dreams.
And we really lucked out with the weather – – as the odds of good weather are apparently better near Lake Marion, local residents told me. Just 15 miles south in Saint George, SC where I held a well attended eclipse outreach event at my hotel the night before, it was sadly socked in.
Solar corona bursts out during the total solar eclipse across America on Monday, August 21, 2017, as seen from Santee, South Carolina and 4.8 miles from the centerline. Credit: Ken Kremer/kenkremer.com
Despite a less than promising weather forecast, the threatening Carolina storm clouds obscuring our sun as we awoke and got our camera gear together Monday morning, fortunately scooted away.
Just in the nick of time the rainy gray breakfast clouds miraculously parted as eclipse time approached and almost completely disappeared by lunchtime – fully an hour prior to the eclipses beginning from our viewing location in Santee; near beautiful Lake Marion, South Carolina, which intersects the heavily traveled I-95 North/South Interstate highway corridor.
Like tens of millions of others, I’ve seen several partial solar eclipses, but this was my first total solar eclipse and it did not disappoint!
And there is just no comparison between seeing a partial and a total solar eclipse – sort of like a family before and after having a baby.
Solar corona and multiple prominences visible during the total solar eclipse across America on Monday, August 21, 2017, as seen from Santee, South Carolina and 4.8 miles from the centerline. Credit: Ken Kremer/kenkremer.com
A few hundred excited people from across the East Coast including some families with kids had coincidentally gathered at our Santee location by the Water Park.
At Santee, SC, we enjoyed unobstructed totality for all 2 minutes, 34 seconds – very close to the longest possible duration of 2 min 43 seconds experienced by folks congregated in Carbondale, Illinois.
Overall our eclipse experience began at 1:14:55 p.m. EDT and concluded at 4:08:01 EDT – nearly three hours.
Totality started at 2:43:42 p.m. EDT and concluded at 2:46:16 p.m. EDT.
View shows partial solar eclipse as the moon begins obscuring the sun on the way to totality during the 2017 total solar eclipse on August 21, as seen from Santee, South Carolina and close to the centerline. Credit: Ken Kremer/kenkremer.com
At lunchtime it was a boiling hot, skin stinging 95+ degrees F. But barely half an hour into the eclipse and with the sun perhaps only a third covered the area noticeably cooled and darkened and the sunburn was gone.
As the eclipse deepened, the sky really darkened to the point we almost needed a flashlight and it was downright comfortable temperature wise.
I’m over the Moon so to speak and still replaying the totality event in my mind from start to finish.
You can follow along by watching this thrilling solar eclipse video produced by Jeff Seibert, and listen to the cheering crowd to get a sense of our Carolina Totality adventure:
Video Caption: Total Solar eclipse from Santee, SC on August 21, 2017. We were 4.8 miles South of the Umbra center line, and had clear weather until just before last contact. Credit: Jeff Seibert
At Santee we were 87% into the umbra with a 70 mile wide (115 km) lunar shadow path width, at 136 feet elevation above sea level.
There is just nothing like ‘Totality’ in my experience as a research scientist and journalist – working with and seeing cool science and space hardware up close.
Totality is a natural wonder of the Universe and it was an electrifying event.
At the moment that totality commenced, day turned almost instantly to night as though someone threw a light switch.
I distinctly heard crackling sounds burst through the air, akin to a thunderbolt clap at that very moment – heralding our sudden jolt to totality.
Cheers broke out. Everyone and myself were so totally in awe of totality. And the sun’s brilliant while corona suddenly became visible, alive and in motion as the solar surface was completely blocked, hidden behind our moon. So I just stared at the stunning beauty, barely able to function as a photographer.
The planet Venus quickly and suddenly and incredibly popped out brilliantly from the darkness of the daytime sky. Some stars were also visible.
You absolutely must experience this incomparable wonder of nature with you own eyeballs.
Focus on the fleeting moment.
Because in a flash of just 2.5 minutes #Eclipse2017 was gone & done!
The all natural light switch had been turned back on by mother nature herself.
If only a replay or restart were possible – someone in the crowd yelled in glee. And we all thought the same way.
Totality, like rockets and science can be addictive in a very positive way.
Furthermore, we also saw the famed partial solar crescents reflecting through trees onto the ground during the partial eclipse phases.
A sliver of the sun reappears after totality concludes during the 2017 total solar eclipse on August 21, as seen from Santee, South Carolina and close to the centerline. Credit: Ken Kremer/kenkremer.com
We very luckily enjoyed virtually perfect weather and clear blue skies for the entirely of the eclipse – from first contact, through totality and the last limb of contact of Earth’s moon covering the sun.
Only a few scattered cloud patches dotted overhead at the start and rapidly exited.
And very happily we were not alone.
The Aug. 21 ‘Total Solar ‘Eclipse Across America’ was enjoyed by tens of millions more lucky spectators, including many friends lining the solar eclipses narrow path of Totality from coast to coast.
The 70-mile-wide (115 km) swath of the Moons shadow raced across America from Oregon to South Carolina in a thrilling event that became sort of a communal experience with all the explanatory news coverage foreshadowing what was to come.
Everyone in North America was able to witness at least a partial solar eclipse, weather permitting- and many did either on there own or at special solar eclipse events organized at towns and cities at museums, parks and open spaces across the country.
12 million people live directly in the path of 2017 solar eclipse totality as it passed through 14 states.
It was the first total solar eclipse visible from the United States since Feb. 26, 1979. And it was the first such coast to coast eclipse crossing the entire continental United States in 99 years since June 8, 1918 during World War 1.
The umbra (or dark inner shadow) of the Moon moved west to east at 3000 MPH in Oregon and 1500 MPH by the time it reached our location in South Carolina.
The 2017 solar eclipse began on the west coast with the lunar shadow entering the US near Lincoln City, Oregon at 9:05 PDT, with totality beginning at 10:15 PDT, according to a NASA description.
Totality ended along the US East Coast in the coastal city of Charleston, South Carolina at 2:48 p.m. EDT. The last remnants of lunar shadow departed at 4:09 p.m. EDT. Charleston is about an hour or so east of my viewing location in Santee and folks there enjoyed stunning views too.
For as long as I live the 2017 Solar Eclipse Totality will be burned into my mind!
Partial solar eclipse as seen from Port Canaveral, Florida where a maximum of about 86% of the sun was covered during the 2017 total solar eclipse on August 21, 2017. Credit: Julia Bergeron
“I’m pretty sure it was not nearly as epic as the total eclipse. It was fun to watch with teenagers though. I think what was unique to me was that I was capturing the equivalent of a crescent sun. Did it get dark here, of course not, but there were a few minutes where the Space Coast went a bit dim. The most fun was looking for the shadows,” writes Julia Bergeron from Port Canaveral, FL.
Partial solar eclipse as seen from Port Canaveral, Florida where a maximum of about 86% of the sun was covered during the 2017 total solar eclipse on August 21, 2017. Credit: Julia BergeronThe 2017 Total solar eclipse as seen from a cell phone through eclipse glasses and reached about 86% of totality in this view from Titusville, Florida on Aug. 21, 2017. Credit: Ashley CarrilloThe 2017 Total solar eclipse as seen from a cell phone through eclipse glasses and reached about 86% of totality in this view from Titusville, Florida on Aug. 21, 2017. Credit: Ashley Carrillo
Watch for Ken’s continuing onsite Minotaur IV ORS-5, TDRS-M, CRS-12 and NASA and space mission reports direct from the Kennedy Space Center and Cape Canaveral Air Force Station, Florida.
Stay tuned here for Ken’s continuing Earth and Planetary science and human spaceflight news.
The 2017 Total solar eclipse as seen through eclipse glasses reached about 86% of totality in this view from Melbourne, Florida on Aug. 21, 2017. Credit: Julian Leek
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Learn more about the 2017 Total Solar Eclipse, upcoming Minotaur IV ORS-5 military launch on Aug. 25, recent ULA Atlas TDRS-M NASA comsat on Aug. 18, 2017 , SpaceX Dragon CRS-12 resupply launch to ISS on Aug. 14, NASA missions and more at Ken’s upcoming outreach events at Kennedy Space Center Quality Inn, Titusville, FL:
Aug 24-26: “2017 Total Solar Eclipse Minotaur IV ORS-5, TDRS-M NASA comsat, SpaceX CRS-12 resupply launches to the ISS, Intelsat35e, BulgariaSat 1 and NRO Spysat, SLS, Orion, Commercial crew capsules from Boeing and SpaceX , Heroes and Legends at KSCVC, ULA Atlas/John Glenn Cygnus launch to ISS, SBIRS GEO 3 launch, GOES-R weather satellite launch, OSIRIS-Rex, Juno at Jupiter, InSight Mars lander, SpaceX and Orbital ATK cargo missions to the ISS, ULA Delta 4 Heavy spy satellite, Curiosity and Opportunity explore Mars, Pluto and more,” Kennedy Space Center Quality Inn, Titusville, FL, evenings
Solar crescents projected on the ground after sunlight funnels through trees during the partial eclipse phases on Aug. 21, 2017. Credit: Julian LeekSolar crescents projected onto the top of a picnic cooler and pine needles on the ground after sunlight funnels through trees during the partial eclipse phases on August 21 in Santee, SC. Credit: Ken Kremer/kenkremer.com2017 Total Solar Eclipse as seen from Red Bank, SC. Credit: John GouldSolar crescents projected on the ground after sunlight funnels through trees during the partial eclipse phases from Red Bank, SC on Aug. 21, 2017. Credit: John Gould
“Astonished at the vivacity and brightness of the corona, and the contrast with the infinitely dark moon. Through binos it almost had me in tears,” writes John Gould from Red Bank, SC.
2017 Total Solar Eclipse and Bailey’s Beads as seen from Santee State Park, SC. Credit: Patrick Hendrickson/HighCamera Photographic ServiceTotal Solar Eclipse of 2017 as seen from Tennessee. Credit: Dawn Leek TaylorTotal Solar Eclipse of 2017 as seen from Tennessee. Credit: Dawn Leek Taylor
The SpaceX Dragon CRS-12 cargo craft is now attached to the International Space Station after arriving on Aug. 16, 2017. It delivered over 3 tons of science and supplies to the six person Expedition 52 crew. Credit: NASA TV
The SpaceX Dragon CRS-12 cargo craft is now attached to the International Space Station after arriving on Aug. 16, 2017. It delivered over 3 tons of science and supplies to the six person Expedition 52 crew. Credit: NASA TV
While Dragon maneuvered in ever so slowly guided by lasers, NASA astronaut Jack Fischer and ESA (European Space Agency) astronaut Paolo Nespoli carefully extended the stations robotic arm to reach out and grapple the gumdrop shaped capsule.
They deftly captured the Dragon CRS-12 resupply spacecraft slightly ahead of schedule at 6:52 a.m. EDT with the station’s 57.7-foot-long (17.6 meter-long) Canadian-built robotic arm while working at a robotics work station in the seven windowed domed Cupola module.
The SpaceX Dragon cargo craft is pictured approaching the International Space Station on Wednesday morning Aug. 16, 2017. Credit: NASA
The million pound orbiting outpost was traveling over the Pacific Ocean north of New Zealand at the time of capture.
Liftoff of the SpaceX Falcon 9 took place precisely on time 2 days earlier with ignition of the 9 Merlin 1D first stage engines from seaside pad 39A at NASA’s Kennedy Space Center in Florida today (Aug. 14) at 12:31 p.m. EDT (1631 GMT).
SpaceX launched its 12th resupply mission to the International Space Station from NASA’s Kennedy Space Center in Florida at 12:31 p.m. EDT on Monday, Aug. 14, 2017. Credit: Ken Kremer/Kenkremer.com
The two stage Falcon 9 stands 213-foot-tall (65-meter-tall). The combined output of the 9 Merlin 1D first stage engines generates 1.7 million pounds of liftoff thrust, fueled by liquid oxygen and RP-1 propellants.
SpaceX launched its 12th resupply mission to the International Space Station from NASA’s Kennedy Space Center in Florida at 12:31 p.m. EDT on Monday, Aug. 14, 2017. Credit: Ken Kremer/Kenkremer.com
See an exciting gallery of launch imagery and videos including the thrilling ground landing of the 156 foot tall first stage booster back at Cape Canaveral at Landing Zone-1 – from this author and several space colleagues.
SpaceX launched its 12th resupply mission to the International Space Station from NASA’s Kennedy Space Center in Florida at 12:31 p.m. EDT on Monday, Aug. 14, 2017. Credit: Ken Kremer/Kenkremer.com
Monday’s picture perfect lunchtime liftoff of the unmanned SpaceX CRS-12 Dragon cargo freighter bound for the ISS and loaded with over 3 tons of science, research hardware and supplies including a hefty cosmic ray detector named ISS-CREAM, medical research experiments dealing with Parkinson’s disease, lung and heart tissue, vegetable seeds, dozens of mice and much more – came off without a hitch.
Ground controllers then carried out the remainder of the work to berth the SpaceX Dragon cargo spacecraft at the Earth facing port on the Harmony module of the International Space Station at 9:07 a.m. EDT.
This illustration of the International Space Station shows the current configuration with four visiting vehicle spaceships parked at the space station including the SpaceX Dragon CRS-12 cargo craft that arrived Aug. 16, 2017, the Progress 67 resupply ship and two Soyuz crew ships. Credit: NASA
The crew was perhaps especially eager for this Dragons arrival because tucked inside the more than 3 tons of cargo was a stash of delicious ice cream treats.
“The small cups of chocolate, vanilla and birthday cake-flavored ice cream are arriving in freezers that will be reloaded with research samples for return to Earth when the Dragon spacecraft departs the station mid-September,” said NASA.
Indeed the crew did indeed open the hatches today, early than planned, a few hours after arrival and completion of the requisite safety and leak checks.
The SpaceX Dragon cargo craft is pictured approaching the International Space Station on Wednesday morning Aug. 16, 2017. Credit: NASA TV
The whole sequence was broadcast on NASA TV that began live arrival coverage at 5:30 a.m showing numerous stunning video sequences of the rendezvous and grappling often backdropped by our precious Home Planet.
The current multinational Expedition 52 crew serving aboard the ISS comprises of Flight Engineers Paolo Nespoli from ESA, Jack Fischer, Peggy Whitson and Randy Bresnik of NASA and Sergey Ryazanskiy and Commander Fyodor Yurchikhin of Roscosmos.
Launch of SpaceX Falcon on Dragon CRS-12 mission to the ISS from NASA’s Kennedy Space Center in Florida at 12:31 p.m. EDT on Monday, Aug. 14, 2017. Credit: Julian Leek
The Dragon resupply ship dubbed Dragon CRS-12 counts as SpaceX’s twelfth contracted commercial resupply services (CRS) mission to the International Space Station for NASA since 2012.
SpaceX holds a NASA commercial resupply services (CRS) contract that includes up to 20 missions under the original CRS-1 contract.
The 20-foot high, 12-foot-diameter Dragon CRS-12 vessel is carrying more than 6,400 pounds ( 2,900 kg) of science experiments and research instruments, crew supplies, food water, clothing, hardware, gear and spare parts to the million pound orbiting laboratory complex. 20 mice are also onboard. This will support dozens of the 250 research investigations and experiments being conducted by Expedition 52 and 53 crew members.
The Expedition 52 crew poses for a unique portrait. Pictured clockwise from top right are, Flight Engineers Paolo Nespoli, Jack Fischer, Peggy Whitson, Sergey Ryazanskiy, Randy Bresnik and Commander Fyodor Yurchikhin. Credit: NASA/Roscosmos/ESA
Video Caption: CRS-12 launch from Pad 39A on a Falcon 9 rocket. Pad camera views from the launch of the CRS-12 mission carrying 6415 pounds of supplies and equipment to the International Space Station on August 14, 2017. Credit: Jeff Seibert
The SpaceX Falcon 9/Dragon CRS-12 launch was the first of a rapid fire sequence of a triad of launches along the Florida Space Coast over the next 11 days of manmade wonder – Plus a Total Solar ‘Eclipse Across America’ natural wonder sandwiched in between !!
Launch of SpaceX Falcon on Dragon CRS-12 mission to the ISS from NASA’s Kennedy Space Center in Florida at 12:31 p.m. EDT on Monday, Aug. 14, 2017. Credit: Julian Leek
Watch for Ken’s continuing onsite CRS-12, TRDS-M, and ORS 5 and NASA mission reports direct from the Kennedy Space Center and Cape Canaveral Air Force Station, Florida.
Stay tuned here for Ken’s continuing Earth and Planetary science and human spaceflight news.
Ground landing of SpaceX Falcon 9 first stage at Landing Zone-1 (LZ-1) after SpaceX launched its 12th resupply mission to the International Space Station from NASA’s Kennedy Space Center in Florida from pad 39A at 12:31 p.m. EDT on Monday, Aug. 14, 2017. Credit: Ken Kremer/Kenkremer.com
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Learn more about the upcoming ULA Atlas TDRS-M NASA comsat on Aug. 18, 2017 , SpaceX Dragon CRS-12 resupply launch to ISS on Aug. 14, Solar Eclipse, NASA missions and more at Ken’s upcoming outreach events at Kennedy Space Center Quality Inn, Titusville, FL:
Aug 17-18: “TDRS-M NASA comsat, SpaceX CRS-12 resupply launches to the ISS, Intelsat35e, BulgariaSat 1 and NRO Spysat, SLS, Orion, Commercial crew capsules from Boeing and SpaceX , Heroes and Legends at KSCVC, ULA Atlas/John Glenn Cygnus launch to ISS, SBIRS GEO 3 launch, GOES-R weather satellite launch, OSIRIS-Rex, Juno at Jupiter, InSight Mars lander, SpaceX and Orbital ATK cargo missions to the ISS, ULA Delta 4 Heavy spy satellite, Curiosity and Opportunity explore Mars, Pluto and more,” Kennedy Space Center Quality Inn, Titusville, FL, evenings
Ground landing of SpaceX Falcon 9 first stage at Landing Zone-1 (LZ-1) after SpaceX launched its 12th resupply mission to the International Space Station from NASA’s Kennedy Space Center in Florida from pad 39A at 12:31 p.m. EDT on Monday, Aug. 14, 2017. Credit: Ken Kremer/Kenkremer.comBlastoff of SpaceX Dragon CRS12 on its 12th resupply mission to the International Space Station from NASA’s Kennedy Space Center in Florida at 12:31 p.m. EDT on Monday, Aug. 14, 2017 as seen from the VAB roof. Credit: Ken Kremer/Kenkremer.comBlastoff of SpaceX Dragon CRS12 on its 12th resupply mission to the International Space Station from NASA’s Kennedy Space Center in Florida at 12:31 p.m. EDT on Monday, Aug. 14, 2017 as seen from the VAB roof. Credit: Ken Kremer/Kenkremer.comBlastoff of SpaceX Dragon CRS12 on its 12th resupply mission to the International Space Station from NASA’s Kennedy Space Center in Florida at 12:31 p.m. EDT on Monday, Aug. 14, 2017 as seen from the VAB roof. Credit: Ken Kremer/Kenkremer.com
New measurements of lunar rocks have demonstrated that the ancient moon generated a dynamo magnetic field in its liquid metallic core (innermost red shell). The results raise the possibility of two different mechanisms — one that may have driven an earlier, much stronger dynamo, and a second that kept the moon’s core simmering at a much slower boil toward the end of its lifetime. Credit: Hernán Cañellas/Benjamin Weiss
When it comes to the study of planets, moons, and stars, magnetic fields are kind of a big deal. Believed to be the result of convection in a planet, these fields can be the difference between a planet giving rise to life or becoming a lifeless ball of rock. For some time, scientists have known that has a Earth’s magnetic field, which is powered by a dynamo effect created by convection in its liquid, outer core.
Scientists have also long held that the Moon once had a magnetic field, which was also powered by convection in its core. Previously, it was believed that this field disappeared roughly 1 billion years after the Moon formed (ca. 3 to 3.5 billion years ago). But according to a new study from the Massachusetts Institute of Technology (MIT), it now appears that the Moon’s magnetic field continued to exist for another billion years.
The study, titled “A two-billion-year history for the lunar dynamo“, recently appeared in the journal Science Advances. Led by Dr. Sonia Tikoo, an Assistant Professor at Rutger’s University and a former researcher at MIT, the team analyzed ancient lunar rocks collected by NASA’s Apollo 15 mission. What they found was that the rock showed signs of a being in magnetic field when it was formed between 1 and 2.5 billion years ago.
Artist’s concept of a collision between proto-Earth and Theia, which led to the formation of Moon, ca. 4.5 billion years ago. Credit: NASA
The age of this rock sample means that it is significantly younger than others returned by the Apollo missions. Using a technique they developed, the team examined the sample’s glassy composition with a magnometer to determine its magnetic properties. They then exposed the sample to a lab-generated magnetic field and other conditions that were similar to those that existed on the Moon when the rock would have formed.
This was done by placing the rocks into a specially-designed oxygen-deprived oven, which was built with the help of Clement Suavet and Timothy Grove – two researchers from MIT’s Department of Earth, Atmospheric and Planetary Sciences (EAPS) and co-authors on the study. The team then exposed the rocks to a tenuous, oxygen-free environment and heated them to extreme temperatures.
As Benjamin Weiss – a professor of planetary sciences at EAPS – explained:
“You see how magnetized it gets from getting heated in that known magnetic field, then you compare that field to the natural magnetic field you measured beforehand, and from that you can figure out what the ancient field strength was… In this way, we finally have gotten an accurate measurement of the lunar field.”
From this, they determined the lunar rock became magnetized in a field with a strength of about 5 microtesla. That’s many times weaker than Earth’s magnetic field when measured from the surface (25 – 65 microteslas), and two orders of magnitude weaker than what it was 3 to 4 billion years ago. These findings were quite significant, since they may help to resolve an enduring mystery about the Moon.
Cutaway of the Moon, showing its differentiated interior. Credit: NASA/SSERVI
Previously, scientists suspected that the Moon’s magnetic field died out 1.5 billion years after the Moon formed (ca. 3 billion years ago). However, they were unsure if this process happened rapidly, or if the Moon’s magnetic field endured, but in a weakened state. The results of this study indicate that the magnetic field did in fact linger for an additional billion years, dissipating about 2.5 billion years ago.
As Weiss indicated, this study raises new questions about the Moon’s geological history:
“The concept of a planetary magnetic field produced by moving liquid metal is an idea that is really only a few decades old. What powers this motion on Earth and other bodies, particularly on the moon, is not well-understood. We can figure this out by knowing the lifetime of the lunar dynamo.”
In other words, this new timeline of the Moon casts some doubt on the theory that a lunar dynamo alone is what powered its magnetic field in the past. Basically, it is now seen as a distinct possibility that the Moon’s magnetic field was powered by two mechanisms. Whereas one allowed for a dynamo in the core that powered its magnetic field for a good billion years after the Moon’s formation, a second one kept it going afterwards.
In the past, scientists have proposed that the Moon’s dynamo was powered by Earth’s gravitational pull, which would have caused tidal flexing in the Moon’s interior (much in the same way that Jupiter and Saturn’s powerful gravity drives geological activity in their moons interiors). In addition, the Moon once orbited much closer to Earth, which may have been enough to power its once-stronger magnetic field.
Artist’s impression of a Mars-sized object crashing into the Earth, starting the process that eventually created our Moon. Credit: Joe Tucciarone
However, the Moon gradually moved away from Earth, eventually reaching its current orbit about 3 billion years ago. This coincides with the timeline of the Moon’s magnetic field, which began to dissipate at about the same time. This could mean that by about 3 billion years ago, without the gravitational pull of the Earth, the core slowly cooled. One billion years later, the core had solidified to the point that it arrested the Moon;s magnetic field. As Weiss explained:
“As the moon cools, its core acts like a lava lamp – low-density stuff rises because it’s hot or because its composition is different from that of the surrounding fluid. That’s how we think the Earth’s dynamo works, and that’s what we suggest the late lunar dynamo was doing as well… Today the moon’s field is essentially zero. And we now know it turned off somewhere between the formation of this rock and today.”
These findings were made possible thanks in part by the availability of younger lunar rocks. In the future, the researchers are planning on analyzing even younger samples to precisely determine where the Moon’s dynamo died out completely. This will not only serve to validate the findings of this study, but could also lead to a more comprehensive timeline of the Moon’s geological history.
The results of these and other studies that seek to understand how the Moon formed and changed over time will also go a long way towards improving our understanding of how Earth, the Solar System, and extra-solar systems came to be.
