Assembly of NASA’s first Orion Crew vehicle that could actually launch to space has been accomplished by prime contractor Lockheed Martin Corporation at the firm’s Waterton space systems facility located near Denver, Colorado, where the spacecraft is slated to begin a severe testing process that will help confirm crew safety.
Orion is NASA’s next generation spacecraft designed to send human crews to low Earth Orbit and beyond to multiple deep space destinations throughout our solar system including the Moon, Mars and Asteroids. Orion was recently recast as the MPCV or Multi Purpose Crew Vehicle in the NASA Authorization Act of 2010.
“The first Orion crew module built to spaceflight specifications is complete,” said Linda Singleton, a spokesperson for Lockheed Martin in an interview.
“Orion will soon be integrated with the launch abort system test article prior to undergoing acoustic, vibration and modal testing in Denver,” Singleton told me. “The testing process will last several months.”
Watch this cool and detailed animation of the testing process to be conducted at the Reverberant Acoustic Lab at Lockheed Martin’s Waterton Facility.
The video also shows how the Orion will be integrated and tested with the Launch Abort System (LAS) that would save the lives of the astronauts on board in the event of a spaceflight emergency.
With the Grand Finale of NASA’s Space Shuttle Program now just days away after the launch of shuttle Atlantis on the STS-135 mission, the US faces a gap with no capability to send humans to space and the International Space Station for a time period extending at least several years.
A replacement vehicle for the retiring shuttle – whether its the Orion or from a commercial provider like SpaceX – can’t come soon enough in order to maintain the viability of the International Space Station.
This Orion vehicle also known as the Ground Test Article, or GTA, will now be subjected to several months of rigorous flight like testing that simulates the harsh environments that astronauts would face during voyages to deep space.
Thereafter, the Orion crew module will be transported in early 2012 to NASA’s Langley Research Center in Virginia where it will undergo water landing drop tests next year at the new Hydro Impact Basin facility.
“The NASA and Lockheed Martin teams hope to achieve Orion/MPCV initial crewed operations by 2016”, said Singleton. “We are aiming for an initial unmanned orbital test flight in 2013.”
A Delta IV Heavy booster rocket is the most likely candidate for the 2013 Orion orbital flight, but a final decision has not yet been announced by NASA.
Meanwhile, another Orion crew module that was flown during the Pad Abort 1 test (PA-1) in 2010 is now on public display at the Kennedy Space Center Visitor Complex in Florida. The vehicle just arrived after a cross country trek from NASA’s Dryden Flight Research Center in California and making several public outreach stops along the way to Florida.
The Orion PA-1 test article is on display until July 4 in the historic Rocket Garden at Kennedy in the shadow of a mighty Saturn 1B and alongside Mercury, Gemini and Apollo Era capsules and rockets. The mockup of the LAS is also still on display at the Kennedy Visitor Complex.
Space Exploration Technologies — or SpaceX as they are more commonly known — has gotten pretty good at launching rockets. Now they want the rest of the world to follow along – one Tweet at a time. The social media site Twitter allows users to post brief comments (under 140 characters). SpaceX views this as a means to keep the public informed about the company’s activities including the upcoming launch of the firm’s Falcon 9 rocket.
SpaceX can be found under the name of @SpaceXer. The NewSpace firm will post regular updates about the company’s activities on Twitter. SpaceX has been working to increase its public and media relations efforts lately. The push for more viewers on Twitter is part of these efforts.
“There are a lot of amazing things that are taking place at a daily basis at SpaceX,” said SpaceX’s Vice President of Communications Bobby Block. “We want to invite the public, everyone really, to follow these events on our Twitter account.”
SpaceX currently plans to launch the next of its Falcon 9 rockets this September. It will be another mission to prove out the Falcon 9’s readiness to begin cargo flights to the space station. For this mission, a flyby of the International Space Station is planned to test out communications equipment. The Dragon spacecraft will then reenter Earth’s atmosphere and splash down in the Pacific Ocean.
This will be the third time that SpaceX has launched a Falcon 9 from Space Launch Complex 40 at Cape Canaveral Air Force Station (CCAFS) in Florida. This past December SpaceX became the first private company to launch a spacecraft to orbit and retrieve it safely from the Pacific Ocean. It is accomplishments such as this that SpaceX wants to broadcast to the world.
“SpaceX has successfully demonstrated not only the viability of the Falcon 9 as a launch vehicle – but also the capabilities of the Dragon Spacecraft,” Block said. “This is just the beginning, now we want the world to come ride along with us.”
SpaceX was selected for not only the Commercial Orbital Transportation Services (COTS) contract with NASA – which has a $1.6 billion value but for NASA’s Commercial Crew Development 2 (CCDev-02) contract as well. Add to that the many business deals that SpaceX has made to send payloads into orbit – and SpaceX has a lot to tweet about.
SpaceX and founder Elon Musk have made it public knowledge regarding their plans to one day launch astronauts to the International Space Station, build a far larger version of its Falcon 9 dubbed the “Falcon Heavy” and to reach out to the planet Mars. SpaceX thinks with plans such as these in the works, space fans and novices alike will be very interested in following along.
Of course, SpaceX is not the only space organization that has recognized the value of social media like Twitter. NASA has embraced Twitter, with almost all of the missions and spacecrafts having Twitter accounts, and fans are finding Twitter to be a great way to find out the latest details from space. Additionally, NASA regularly hosts “Tweetups” when large events are scheduled to take place, such as the upcoming final launch of the space shuttle program.
A new world in our Solar System is about to be unveiled for the first time – the mysterious protoplanet Vesta, which is the second most massive object in the main Asteroid Belt between Mars and Jupiter.
NASA’s Dawn Asteroid orbiter has entered its final approach phase to Vesta and for the first time is snapping images that finally exceed those taken several years ago by the iconic Hubble Space Telescope.
“The Dawn science campaign at Vesta will unveil a mysterious world, an object that can tell us much about the earliest formation of the planets and the solar system,” said Jim Adams, Deputy Director, Planetary Science Directorate at NASA HQ at a briefing for reporters.
Vesta holds a record of the earliest history of the solar system. The protoplanet failed to form into a full planet due to its close proximity to Jupiter.
Check out this amazing NASA approach video showing Vesta growing in Dawn’s eyes. The compilation of navigation images from Dawn’s framing camera spans about seven weeks from May 3 to June 20 was released at the NASA press briefing by the Dawn science team.
Dawn’s Approach to Vesta – Video
Best View from Hubble – Video
Be sure to notice that Vesta’s south pole is missing due to a cataclysmic event eons ago that created a massive impact crater – soon to be unveiled in astounding clarity. Some of that colossal debris sped toward Earth and survived the terror of atmospheric entry. Planetary Scientists believe that about 5% of all known meteorites originated from Vesta, based on spectral evidence.
After a journey of four years and 1.7 billion miles, NASA’s revolutionary Dawn spacecraft thrusting via exotic ion propulsion is now less than 95,000 miles distant from Vesta, shaping its path through space to match the asteroid.
The internationally funded probe should be captured into orbit on July 16 at an initial altitude of 9,900 miles when Vesta is some 117 million miles from Earth.
After adjustments to lower Dawn to an initial reconnaissance orbit of approximately 1,700 miles, the science campaign is set to kick off in August with the collection of global color images and spectral data including compositional data in different wavelengths of reflected light.
Dawn will spend a year investigating Vesta. It will probe the protoplanet using its three onboard science instruments – provided by Germany, Italy and the US – and provide researchers with the first bird’s eye images, global maps and detailed scientific measurements to elucidate the chemical composition and internal structure of a giant asteroid.
“Navigation images from Dawn’s framing camera have given us intriguing hints of Vesta, but we’re looking forward to the heart of Vesta operations, when we begin officially collecting science data,” said Christopher Russell, Dawn principal investigator, at the University of California, Los Angeles (UCLA). “We can’t wait for Dawn to peel back the layers of time and reveal the early history of our solar system.”
Because Dawn is now so close to Vesta, the frequency of imaging will be increased to twice a week to achieve the required navigational accuracy to successfully enter orbit., according to Marc Rayman, Dawn Chief Engineer at the Jet Propulsion Laboratory (JPL) in Pasadena, Calif.
“By the beginning of August, it will see Vesta with more than 100 times the clarity that Hubble could ever obtain,” says Rayman.
Dawn will gradually edge down closer to altitudes of 420 miles and 120 miles to obtain ever higher resolution orbital images and spectal data before spiraling back out and eventually setting sail for Ceres, the largest asteroid of them all.
Dawn will be the first spacecraft to orbit two celestial bodies, only made possible via the ion propulsion system. With a wingspan of 65 feet, it’s the largest planetary mission NASA has ever launched.
“We’ve packed our year at Vesta chock-full of science observations to help us unravel the mysteries of Vesta,” said Carol Raymond, Dawn’s deputy principal investigator at JPL.
“This is an unprecedented opportunity to spend a year at a body that we know almost nothing about,” added Raymond. “We are very interested in the south pole because the impact exposed the deep interior of Vesta. We’ll be able to look at features down to tens of meters so we can decipher the geologic history of Vesta.”
NASA Shuttle managers met today (28 June) and officially set July 8 as the launch date for the Grand Finale of the shuttle program by Space Shuttle Atlantis. And the NASA officials also emphasized that the STS-135 mission is absolutely crucial to the future well being and functioning of the International Space Station (ISS).
“This flight is incredibly important,” said Bill Gerstenmaier, NASA associate administrator for space operations. “The cargo that is coming up on this flight is really mandatory for space station. This mission is critical from a resupply standpoint. We will stay on orbit in case of some small orbiter failures.”
Atlantis’ primary goal is to dock with the million pound orbiting outpost and deliver the “Raffaello” logistics module. Raffaello is packed to the gills with some 5 tons of critical spare parts, food, water, provisions and science equipment that will keep the station stocked and the crew fed for a year. About one third of the cargo is food.
The STS 135 mission will buy invaluable time to keep the station running and science experiments continuing full tilt after the shuttles are retired and until replacement cargo vehicles are brought online.
NASA hopes that commercial providers – SpaceX and Orbital Sciences – will soon pick up the slack and fill the supply void created by prematurely shutting down the shuttles now, before the replacement vehicles are functioning and proven. If the private company’s spacecraft are further delayed, then the ISS crew size may have to be reduced from 6 to 3 and station science operations could be significantly curtailed.
NASA announced the unanimous “GO” for the July 8 liftoff following a day long Flight Readiness Review at the Kennedy Space Center involving senior shuttle managers from the NASA and contractor teams.
“We had a very thorough review,” said Gerstenmaier. Shuttle managers reviewed the shuttle and launch pad systems, the risks associated with the flight as well as the payloads tucked inside the orbiter and an assortment of technical issues and problems that cropped up during the pre-launch processing.
The STS-135 crew comprises of just four astronauts, all veterans, led by Shuttle Commander Ferguson who is joined by Pilot Doug Hurley, and Mission Specialists Sandy Magnus and Rex Walheim. They are scheduled to fly back to Kennedy on Independence Day, Monday, July 4, for the final days of launch preparations.
Since there is no back up rescue shuttle, the shuttle astronauts would have to return to Earth aboard Russian Soyuz capsules in the event of an on orbit emergency.
“We’re really looking forward to achieving this mission, putting station where it needs to be and finishing strong with the shuttle program here with STS-135,” said Mike Moses, Space Shuttle Program launch integration manager.
Moses added that NASA very much wants to extend the planned 12 day flight by one more day to give the crew more time to transfer cargo back and forth between Raffaello and the station.
NASA especially wants to fully load Raffaello for the return trip with experiment samples and voluminous no longer needed items of trash to give the station crew additional work and storage space. The extension depends on consumables use and will be decided once on orbit. Without the shuttle, down mass capability will be severely limited until the private providers are ready.
Technicians at the pad worked successfully to swap out a faulty shuttle engine valve and take X-rays of reinforcing joints on the External Tank after the recent tanking test, thus enabling NASA to approve the July 8 launch date.
“Atlantis is in great shape out at the pad,” said Mike Leinbach, shuttle launch director. “Team Atlantis is feeling good about the flow and the launch countdown and hope we’ll be able to get her off the ground on Friday the 8th as scheduled.”
“We expect between 500,000 and 750,000 visitors for the launch,” added Leinbach. “We have three launch attempts available on July 8, 9 and 10.”
The countdown clocks will start ticking backwards at 1 p.m. on July 5. STS-135 is the 135th and last shuttle mission.
This will be Atlantis’ 33rd flight and the 37th overall to the station.
Atlantis will be the last of NASA’s three shuttle orbiters to be retired.
Voyager, Proteus and SpaceShipOne have become aerospace legends. As has the man who established them all – Burt Rutan. Zenith Press has released a chronicle of the man and his machines entitled Burt Rutan’s Race to Space: The Magician of Mojave and His Flying Innovations. The book provides a chronicle of all the air and spacecraft that have soared off of Rutan’s blueprints and into reality.
The book’s first main segment is a large section which is essentially a catalog of the numerous craft that Rutan has produced over the decades. Many of the flying machines have their unique characteristics highlighted within the 160 pages of this book. Fear not, this tome is wallpapered with images – most of which are color (175 color images to 55 black and white).
Some of the most interesting of these images are not the glossy stills of air or spacecraft in action but rather the simple drawings that are done by the man himself. These sketches, some little more than cartoons others just simplistic line-drawings, highlight the genius that is Rutan and provide an insight into how his mind works.
The nature of the book changes somewhat when one reaches the chapter entitled, “The Scaled Composites Years.” From this point on, the book’s focus narrows to concentrate on Rutan’s X-PRIZE efforts – and beyond.
The book was written by Dan Linehan and is his second detailing the efforts of Rutan and Scaled Composites (the first was SpaceShipOne: An Illustrated History). In short, the freelance writer is steeped in all things Rutan. Whereas his first work on the subject covered the history-making flight of SpaceShipOne, this effort is a general overview of Rutan and his legacy. But be forewarned, there are many projects that span the entire realm of aerospace that Rutan and company have been involved with that might surprise you.
Given that the Mojave “magician” has retired recently – this book is timely, enjoyable and acts as a wonderful window into the mind of the man that has revolutionized flight. SpaceShipTwo continues to successfully complete test after test – making Burt Rutan’s Race to Space a primer for things to come. The book retails for $30, and it is well-worth the price and will be a welcome addition to any space buff’s collection.
CAPE CANAVERAL Fla. – He has been with the shuttle program for the past three decades and has witnessed both its tragedies and its triumphs. NASA’s Shuttle Launch Director Mike Leinbach reflected on the end of the shuttle era when interviewed this week. He talked a bit about his plans for the future as well as what he thinks people can expect from both him and his team on launch day.
Q: The Terminal Countdown Demonstration Test (TCDT) for STS-135 has just wrapped up, is this is a period of accelerated work for you and your team or is this a time when you can catch your breath?
Leinbach: “This TCDT was a little different; we had a very busy period getting the crew
ready for this mission. On July 4 we’ll have a bit of a break and then things
will pick right back up again as we get ready for launch.”
Q: What do you think you will be feeling when that final launch occurs?
Leinbach: “I don’t know, I mean I have thought a lot about this…I don’t know what it’s
going to be like. For the last flight of Discovery we had one more launch for
both Endeavour and Atlantis, well now this really and truly the last flight of
the shuttle program… so it’s going to be a very reflective time.”
Q: Do you think anything will be special about this mission?
Leinbach: “The launch itself will be very much any other launch. When the guy’s are
working on the consoles they are very serious about what they are doing.
They won’t be distracted by the fact that it is the last one.
Q: Speaking of your job – it keeps you very busy, have you had any time to reflect?
Leinbach: “For the moment I still have a lot to do concluding TCDT, but this Saturday I
am planning on driving out to the launch pad and just looking up at Atlantis
and just soaking it all in, all by myself.”
Leinbach started working for NASA as a structural engineer in 1984, his words are softly spoken which tends to lend them even more weight. His first mission as launch director was STS-114. This was the first shuttle launch after the loss of the space shuttle Columbia in 2003. Leinbach led the recovery team searching for Columbia’s debris in Texas. A year later in 2004 Leinbach was awarded the Presidential Rank Award, which is given in recognition of long-term accomplishments.
Atlantis will carry the four person crew of STS-135 to the International Space Station on a resupply flight designed to keep the orbiting outpost well stocked after the shuttles are decommissioned. The mission is scheduled to last twelve days, launching on July 8 at 11:26 a.m. EDT. The crew consists of Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim.
KENNEDY SPACE CENTER – The “Final Four” shuttle astronauts who will ever voyage to Earth orbit aboard a NASA Space Shuttle Orbiter jetted into the Kennedy Space Center (KSC) this week for their final simulated countdown training at the seaside Florida Launch Pad.
The all veteran crew for the STS-135 mission arrived at Kennedy’s Shuttle Landing Facility (SLF) on twin T-38 jets for four days of comprehensive flight training for what’s known as the Terminal Countdown Demonstration Test (TCDT). Along with all other shuttle flight related activities, it’s the very last time this training will ever occur.
The TCDT is part of the ritual of training for all shuttle crews that takes place in the last few weeks preceding a liftoff and that concludes with a full countdown dress rehearsal from inside Atlantis at the launch pad.
Chris Ferguson is leading the STS-135 mission and he will be recorded in history as the final Space Shuttle Commander. This will be Ferguson’s third shuttle flight and second one as Commander. Also aboard are Pilot Doug Hurley and Mission Specialists Sandy Magnus and Rex Walheim.
The quartet of space flyers are due to blast off aboard Space Shuttle Atlantis on July 8 at 11:26 a.m. EDT for the “Grand Finale” of NASA’s thirty year old Space Shuttle Program. If all goes according to plan the end of the Shuttle Era is less than 1 month away.
It’s a bittersweet moment for everyone working on the shuttle program. Proud to be part of a magnificent adventure with the most complicated machine ever built by humans, but simultaneously sad that the program is ending well before its true flight time is up and with no concrete timetable to replace the trio of majestic spaceships.
“We are incredibly proud to represent this, the final flight,” said STS-135 Commander Chris Ferguson after touchdown to dozens and dozens of journalists gathered at the shuttle landing strip to greet the astronauts.
“I speak on behalf of the crew, everyone in the astronaut office, and I’m sure everybody here at KSC in saying that we are just trying to savor the moment,” Ferguson added. “As our children and our children’s children ask us, we want to be able to say, ‘We remember when there was a space shuttle.”
The first order of business for Ferguson and Hurley was to practice shuttle landings in the Shuttle Training Aircraft (STA), which is a modified Gulfstream II jet.
During the TCDT period, the crew engaged in mission briefings at the Launch Control Center which is the brain of shuttle launch operations, payload familiarization and training at the Space Station Processing Facility, fire suppression training, range safety and security briefings and emergency escape training in an M113 armored personnel carrier near Launch Pad 39A. Read more in my upcoming features.
On the last day of TCDT, the astronauts donned their orange launch and entry suits, journeyed to the pad in the Astrovan and were strapped to their assigned seated inside the orbiter exactly as will occur on launch day for a full dress rehearsal of the launch countdown.
The crew also met with over 100 reporters for a Q & A session at the base of Launch Pad 39A which was back dropped by a thrilling view of Shuttle Atlantis atop the Mobile Launch Platform and the gigantic Flame Duct which directs the rocket exhaust way from the shuttle stack during launch.
“We’re very honored to be in this position,” Ferguson said to reporters at the foot of the pad. “There are many people who could be here. When the dice fell our names were facing up. We consider ourselves fortunate and lucky.”
“I think each of us feels a little extra burden to make sure we put on the best possible face forward for the last go around of this. The crew’s very prepared and we’re going to do a fantastic job.”
“I don’t think that the full magnitude of the moment will really hit us until the wheels have stopped on the runway,” said Ferguson, reflecting on the significance of the grand finale of all shuttle missions. “I’m not sure words will really be able to capture for the crew and for the entire shuttle workforce just how much the shuttle program has meant to us for the last 30 years.”
“TDCT is very comprehensive, hands on and invaluable training at the place you’re going to do it,” said Hurley. “Everything is a just a little bit different when you are in the real vehicle so this is a great way to get you ready for launch day – when it counts!”
Tucked inside Atlantis cargo bay is the Italian- built “Raffaello” logistics module, the primary payload. Raffaello is loaded full with some five tons of critical spare parts, crew supplies and science experiments that will be delivered to the International Space Station (ISS) during the 12 day flight.
The secondary payload is the Robotic Refueling Mission (RRM) which will demonstrate tools and techniques to refuel satellites in orbit.
“Sandy Magnus is our ‘transfer czar’ in charge of emptying and filling Raffaello,” said Ferguson. Magnus is an ideal choice for the mission since she lived for months aboard the orbiting outpost and is familiar with its nook and crannies.
“We feel very honored to be on this flight and are very focused to perform it well,” said Magnus. “We are just the tip of the iceberg of a huge group of people who plan and get the hardware ready and prepare all our procedures.”
“I often think about how we will launch from the exact same launch pad that Apollo 11 launched at to go to the moon. It gives you goose bumps,” said Walheim.
NASA’s next Mars rover, the Curiosity Mars Science Laboratory, will soon embark on a quantum leap in humankind’s scientific exploration of the Martian surface -the most Earthlike planet in our Solar System.
To get a birds eye understanding of Curiosity’s magnificent capabilities, check out the dramatic new high resolution animation below which depicts NASA’s next Mars rover traversing tantalizing terrain for clues to whether Martian microbial life may have existed, evolved and been sustained in past or present times.
The new action packed animation is 11 minutes in length. It depicts sequences starting with Earth departure, smashing through the Martian atmosphere, the nail biting terror of the never before used rocket-backpack sky crane landing system and then progressing through the assorted science instrument capabilities that Curiosity will bring to bear during its minimum two year expedition across hitherto unseen and unexplored Martian landscapes, mountains and craters.
Curiosity is equipped with 10 science instruments. The three meter long robot is five times the weight of any previous Mars rover.
Those who closely follow the adventures of NASA’s Spirit and Opportunity rovers, like myself, will quickly recognize several of the panoramic scenes which have been included to give a realistic feeling of vistas to expect from the car sized Curiosity rover.
Here is a shorter 4 minute animation with expert narration
Along the way you’ll experience Curiosity zapping rocks with a laser, deftly maneuvering her robotic arm and camera mast and retrieving and analyzing Martian soil samples.
“It is a treat for the 2,000 or more people who have worked on the Mars Science Laboratory during the past eight years to watch these action scenes of the hardware the project has developed and assembled,” said Mars Science Laboratory Project Manager Pete Theisinger at NASA’s Jet Propulsion Laboratory, Pasadena, Calif, in a NASA statement. “The animation also provides an exciting view of this mission for any fan of adventure and exploration.”
Curiosity was flown this week from her birthplace at NASA’s Jet Propulsion Laboratory in California to her future launch site in Florida aboard a C-17 military cargo transport aircraft.
She arrived at the Shuttle Landing Facility (SLF) at the Kennedy Space Center on June 22. The SLF is the same landing strip where I watched the STS-135 crew arrive for NASA’s final shuttle mission just days earlier days for their final launch countdown training.
NASA has scheduled Curiosity to blast off for the red planet on Nov. 25, 2011 from Cape Canaveral Air Force Station aboard an Atlas V rocket. Curiosity will touchdown in August 2012 at a landing site that will be announced soon by Ed Weiler, NASA Associate Administrator for the Science Mission Directorate in Washington, D.C.
Check out this way cool time-lapse movie of NASA’s Curiosity Mars rover as its being packed up for her trip to Florida.
The video covers a 4 day period from June 13 to 17 and is condensed to just 1 minute. Watch the JPL engineers and technicians prepare Curiosity and the descent stage for shipping to the Kennedy Space Center in Florida and place it inside a large protective shipping container. Continue reading “Packing a Mars Rover for the Trip to Florida”
[/caption]
NASA’s MESSENGER probe to Mercury, the scorched, innermost planet of our solar system, is sending back so much startling and revolutionary data and crystal clear images that the results are forcing scientists to toss out previously cherished theories and formulate new ones even as the results continues to pour in. And the mission has barely begun to explore Mercury’s inner secrets, exterior surface and atmospheric environment.
MESSENGER became the first spacecraft ever to orbit planet Mercury on March 18, 2011 and has just completed the first quarter of its planned one year long mission – that’s the equivalent of one Mercury year.
MESSENGER has collected a treasure trove of new data from the seven instruments onboard yielding a scientific bonanza; these include extensive global imagery, measurements of the planet’s surface chemical composition, topographic evidence for significant amounts of water ice, magnetic field and interactions with the solar wind, reported the science team at a press conference at NASA Headquarters.
“We are delighted to share the findings of the first 25% of our year long mission,” said MESSENGER principal investigator Sean Solomon of the Carnegie Institution of Washington at a press briefing for reporters. “We receive new data back almost every day.”
“MESSENGER has snapped over 20,000 images to date,” said Solomon, at up to 10 meters per pixel. The probe has also taken over two million laser-ranging topographic observations, discovered vast volcanic plains, measured the abundances of many key elements and confirmed that bursts of energetic particles in Mercury’s magnetosphere result from the interaction of the planets magnetic field with the solar wind.
“We are assembling a global overview of the nature and workings of Mercury for the first time.”
“We had many ideas about Mercury that were incomplete or ill-formed, from earlier flyby data,” explained Solomon. “Many of our older theories are being cast aside into the dust bin as new observations from new orbital data lead to new insights. Our primary mission has another three Mercury years to run, and we can expect more surprises as our solar system’s innermost planet reveals its long-held secrets.”
NASA’s Mariner 10 was the only previous robotic probe to explore Mercury, during three flyby’s back in the mid-1970’s early in the space age.
MESSENGER was launched in 2004 and the mission goal is to produce the first global scientific observations of Mercury and piece together the puzzle of how Mercury fits in with the origin and evolution of our solar system.
There was very little prior imaging coverage of Mercury’s northern polar region.
“We’ve now filled in many of the gaps,” said Messenger scientist Brett Denevi of Johns Hopkins University’s Applied Physics Laboratory (APL). “We now see large smooth plains that are thought to be volcanic in origin.”
“Now we’re seeing for the first time their full extent, which is around 4 million square kilometers (1.54 million square miles). That’s about half the size of the continental United States.”
“We see all kinds of evidence for volcanism and tectonic deformation of the plains from orbit where we can look straight down,” added Denevi. “In the new images we see ghost craters from pre-existing impact craters that were later covered over by lava.’
Color images of the whole planet – with a resolution of about 1 kilometer per pixel – tell the researchers about the chemical composition and rock types on Mercury’s surface.
“We don’t know the composition yet.”
“We are very excited to study these huge volcanic deposits near the north pole with the implications for the evolution of Mercury’s crust and how it formed,” said Denevi.
“Targeted new high resolution imaging is helping us see landforms unlike anything we’ve seen before on Mercury or the moon.”
Determining whether Mercury harbors caches of polar water ice is another one of the many questions the MESSENGER science team hopes to answer.
Two decades ago, Earth-based radar images showed deposits thought to consist of water ice near Mercury’s north and south poles. Researchers postulated a theory that these icy deposits are preserved on the cold, permanently shadowed floors of high-latitude impact craters, similar to those on Earth’s moon.
Early results from topographic measurements are promising.
“The very first scientific test of that hypothesis using Messenger data from orbit has passed with flying colors.”
“The area of possible polar water ice is quite a bit larger than on the moon,” said Solomon. “Its probably meters or more in depth based on radar measurements.”
“And we may have the irony that the planet closest to the sun may have more water ice at its poles than even our own moon.”
“Stay tuned. As this mission evolves, we will be relying on the geochemical and remote sensing instruments which take time to collect observations. The neutron and gamma ray spectrometers have the ability to tell us the identity of these icy materials,” said Solomon.