NASA Archives

January 13, 2018January 13, 2018 by Matt Williams

Huge Sheets of Ice Found Hidden Just Beneath the Surface of Mars

A cross-section of underground ice is exposed at the steep slope that appears bright blue in this enhanced-color view from the HiRISE camera on NASA's Mars Reconnaissance Orbiter. Credits: NASA/JPL-Caltech/UA/USGS

Its an established fact that Mars was once a warmer and wetter place, with liquid water covering much of its surface. But between 4.2 and 3.7 billion years ago, the planet lost its atmosphere, which caused most of its surface water to disappear. Today, much of that water remains hidden beneath the surface in the form of water ice, which is largely restricted to the polar regions.

In recent years, scientists have also learned of ice deposits that exist in the equatorial regions of Mars, though it was unlcear how deep they ran. But according to a new study led by the U.S. Geological Survey, erosion on the surface of Mars has revealed abundant deposits of water ice. In addition to representing a major research opportunity, these deposits could serve as a source of water for Martian settlements, should they ever be built.

The study, titled “Exposed subsurface ice sheets in the Martian mid-latitudes“, recently appeared in Science. The study was led by Colin M. Dundas, a researcher with the U.S. Geological Survey, and included members from the Lunar and Planetary Laboratory (LPL) at the University of Arizona, Johns Hopkins University, the Georgia Institute of Technology, the Planetary Science Institute, and the Institute for Geophysics at the University of Texas at Austin.

*Artists concept of the Mars Reconnaisance Orbiter (MRO). Credit: NASA/JPL*

For the sake of their study, the team consulted data obtained by the High Resolution Imaging Science Experiment (HiRISE) aboard the Mars Reconnaissance Orbiter (MRO). This data revealed eight locations in the mid-latitude region of Mars where steep slopes created by erosion exposed substantial quantities of sub-surface ice. These deposits could extend as deep as 100 meters (328 feet) or more.

The fractures and steep angles indicate that the ice is cohesive and strong. As Dundas explained in a recent NASA press statement:

“There is shallow ground ice under roughly a third of the Martian surface, which records the recent history of Mars. What we’ve seen here are cross-sections through the ice that give us a 3-D view with more detail than ever before.”

These ice deposits, which are exposed in cross-section as relatively pure water ice, were likely deposited as snow long ago. They have since become capped by a layer of ice-cemented rock and dust that is between one to two meters (3.28 to 6.56 ft) thick. The eight sites they observed were found in both the northern and southern hemispheres of Mars, at latitudes from about 55° to 58°, which accounts for the majority of the surface.

It would be no exaggeration to say that this is a huge find, and presents major opportunities for scientific research on Mars. In addition to affecting modern geomorphology, this ice is also a preserved record of Mars’ climate history. Much like how the Curiosity rover is currently delving into Mars’ past by examining sedimentary deposits in the Gale Crater, future missions could drill into this ice to obtain other geological records for comparison.

*At this pit on Mars, the steep slope at the northern edge (toward the top of the image) exposes a cross-section of a thick sheet of underground water ice. Credits: NASA/JPL-Caltech/UA/USGS*

These ice deposits were previously detected by the Mars Odyssey orbiter (using spectrometers) and ground-penetrated radar aboard the MRO and the ESA’s Mars Express orbiter. NASA also sent the Phoenix lander to Mars in 2008 to confirm the findings made by the Mars Odyssey orbiter, which resulted in it finding and analyzing buried water ice located at 68° north latitude.

However, the eight scarps that were detected in the MRO data directly exposed this subsurface ice for the first time. As Shane Byrne, the University of Arizona Lunar and Planetary Laboratory and a co-author on the study, indicated:

“The discovery reported today gives us surprising windows where we can see right into these thick underground sheets of ice. It’s like having one of those ant farms where you can see through the glass on the side to learn about what’s usually hidden beneath the ground.”

These studies would also help resolve a mystery about how Mars’ climate changes over time. Today, Earth and Mars have similarly-tiled axes, with Mars’ axis tilted at 25.19° compared to Earth’s 23.439°. However, this has changed considerably over the course of eons, and scientists have wondered how increases and decreases could result in seasonal changes.

Artist’s impression of glaciers that may have existed on the surface of Mars in the past. Credit: NASA/Caltech/JPL/UTA/UA/MSSS/ESA/DLR Eric M. De Jong, Ali Safaeinili, Jason Craig, Mike Stetson, Koji Kuramura, John W. Holt

Basically, during periods where Mars’ tilt was greater, climate conditions may have favored a buildup of ice in the middle-latitudes. Based on banding and color variations, Dundas and his colleagues have suggested that layers in the eight observed regions were deposited in different proportions and with varying amounts of dust based on varying climate conditions.

As Leslie Tamppari, the MRO Deputy Project Scientist at NASA’s Jet Propulsion Laboratory, said:

“If you had a mission at one of these sites, sampling the layers going down the scarp, you could get a detailed climate history of Mars. It’s part of the whole story of what happens to water on Mars over time: Where does it go? When does ice accumulate? When does it recede?”

The presence of water ice in multiple locations throughout the mid-latitudes on Mars is also tremendous news for those who want to see permanent bases constructed on Mars someday. With abundant water ice just a few meters below the surface, and which is periodically exposed by erosion, it would be easily accessible. It would also mean bases need not be built in polar areas in order to have access to a source of water.

This research was made possible thanks to the coordinated use of multiple instruments on multiple Mars orbiters. It also benefited from the fact that these missions have been studying Mars for extended periods of time. The MRO has been observing Mars for 11 years now, while the Mars Odyssey probe has been doing so for 16. What they have managed to reveal in that time has provided all kinds of opportunities for future missions to the surface.

Further Reading: NASA, Science

January 10, 2018 by Matt Williams

The Ozone Hole is Definitely Recovering

A view of Earth's atmosphere from space. Credit: NASA

The ozone layer is a integral part of what makes Earth habitable. This region of the stratosphere is responsible for absorbing the majority of the Sun’s ultraviolet radiation, thus ensuring terrestrial organisms are not irradiated. Since the 1970s, scientists became aware of a steady decline in this layer around the southern polar region, along with and a major seasonal decrease. This latter phenomena, known as the “ozone hole”, has been a major concern for decades.

Attempts to remedy this situation have focused on cutting the use of industrial chemicals, such as chlorofluorocarbons (CFCs). These efforts culminated with the signing of the Montreal Protocol in 1987, which called for the complete phasing out of ozone-depleting substances (ODSs). And according to recent study by a team of NASA scientists, the ozone hole is showing signs of significant recovery as a result.

The study, titled “Decline in Antarctic Ozone Depletion and Lower Stratospheric Chlorine Determined From Aura Microwave Limb Sounder Observations“, recently appeared in the scientific journal Geophysical Research Letters. The study was led by Susan E Strahan and co-authored by Anne R. Douglass, two research scientists with NASA Goddard’s Atmospheric Chemistry and Dynamics Laboratory.

*Artist’s impression of the Aura satellite. Credit: NASA*

For the sake of their study, the team consulted data from NASA’s Aura satellite, which has been monitoring the southern polar region since 2005. Having launched in 2004, the purpose of the Aura satellite was to conduct measurements of ozone, aerosols and key gases in the Earth’s atmosphere. And according to the readings it has gathered since 2005, the reductions in the use of CFCs has led to a 20% decrease in ozone depletion.

Simply put, CFCs are long-lived chemical compounds that are made up of carbon, chlorine, and fluorine. Since the latter half of the 20th century, they have been used in a number of industrial applications such as refrigeration (as Freon), in chemical aerosols (as propellants), and as solvents. Eventually, these chemicals rise into the stratosphere where they become subject to UV radiation and are broken down into chlorine atoms.

These chlorine atoms play havoc with the ozone layer, where they catalyze to form oxygen gas (O²). This activity begins around July during the Southern Hemisphere’s winter, when the Sun’s rays cause an increase in the catalyzing of CFC-derived chlorine and bromine atoms in the atmosphere. By September (i.e. spring in the southern hemisphere), the activity peaks, resulting on the “ozone hole” that scientists first noted in 1985.

In the past, statistical analysis studies have indicated that ozone depletion has increased since. However, this study – which was the first to use measurements of the chemical composition inside the ozone hole – indicated that ozone depletion is decreasing. What’s more, it indicated that the decrease is caused by the decline in CFC use.

As Susan Strahan explained in a recent NASA press release, “We see very clearly that chlorine from CFCs is going down in the ozone hole, and that less ozone depletion is occurring because of it.” To determine how ozone and other chemicals in the atmosphere have changed from year to year, scientists have relied on data from the Aura satellite’s Microwave Limb Sounder (MLS).

Unlike other instruments that rely on sunlight to obtain spectra from atmospheric gases, this instrument measures these gases respective microwave emissions. As a result, it can measure trace gases over Antarctica during a key time of the year – when the southern hemisphere is experiencing winter and weather in the stratosphere is calm and temperatures are low and stable.

The change in ozone levels from the beginning to the end of Southern Hemisphere’s winter (early July to mid-September) was computed daily using MLS measurements every year from 2005 to 2016. While these measurements indicated a decrease in ozone loss, Strahan and Douglass wanted to be certain reductions in the use of CFCs was what was responsible.

This they did by looking for telltale signs of hydrochloric acid in the MLS data, which chlorine will form by reacting with methane (but only when all available ozone is depleted). As Strahan explained:

“During this period, Antarctic temperatures are always very low, so the rate of ozone destruction depends mostly on how much chlorine there is. This is when we want to measure ozone loss… By around mid-October, all the chlorine compounds are conveniently converted into one gas, so by measuring hydrochloric acid we have a good measurement of the total chlorine.”

*Images from the Ozone Monitoring Instrument (OMI) on NASA’s Aura satellite showing ozone fluctuations between 2010 and 2011. Credit: NASA/Rob Simmon*

Another hint came in the form of nitrous oxide levels, another long-lived gas that behaves just like CFCs in much of the stratosphere – but which is not in decline like CFCs. If CFCs in the stratosphere were decreasing, it would mean that less chlorine would be present compared to nitrous oxide. By comparing MLS measurements of hydrochloric acid and nitrous oxide each year, they determined that chlorine levels were declining by about 0.8 percent per year.

As Strahan indicated, this added up to a 20% decrease from 2005 to 2016, which was consistent with what they expected. “This is very close to what our model predicts we should see for this amount of chlorine decline,” she said. “This gives us confidence that the decrease in ozone depletion through mid-September shown by MLS data is due to declining levels of chlorine coming from CFCs. But we’re not yet seeing a clear decrease in the size of the ozone hole because that’s controlled mainly by temperature after mid-September, which varies a lot from year to year.”

This process of recovery is expected to continue as CFCs gradually leave the atmosphere, though scientists anticipate that a complete recovery will take decades. This is very good news considering that the ozone hole was discovered only about three decades ago, and ozone levels began to stabilize about a decade later. Still, as Douglass explained, a full recovery is not likely to take place until the latter half of this century:

“CFCs have lifetimes from 50 to 100 years, so they linger in the atmosphere for a very long time. As far as the ozone hole being gone, we’re looking at 2060 or 2080. And even then there might still be a small hole.”

The Montreal Protocol is often touted as an example of effective international climate action, and for good reason. The Protocol was struck thirteen years after the scientific consensus on ozone depletion was reached, and just two years after the rather alarming discovery of the ozone hole. And in the years that followed, the signatories remained committed to their goals and achieved target reductions.

In the future, it is hoped that similar action can be achieved on climate change, which has been subject to delays and resistance for many years now. But as the case of the ozone hole demonstrates, international action can address a problem before it is too late.

Further Reading: NASA

January 4, 2018January 4, 2018 by Matt Williams

Here’s the Earth and Moon Seen from OSIRIS-REx

The Earth-Moon system, as imaged by NASA's OSIRIS-REx mission. Credit: NASA/OSIRIS-REx team and the University of Arizona

On September 8th, 2016, NASA’s Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) mission was launched into space. In the coming months, this space probe will approach and then rendezvous with the asteroid 101955 Bennu – a Near-Earth Object (NEO) – for the sake of studying it. The mission will also acquire samples of the asteroid, which will be returned to Earth by 2023.

The OSIRIS-REx mission is an historic one, since it will be the first US spacecraft to conduct a sample-return mission with an asteroid. In the meantime, as the probe has makes its way further into space, it has been providing some truly breathtaking images of the journey. Consider the recently-released composite image of the Earth-Moon system, which NASA created using images that were taken by the probe on October 2nd, 2017.

The images were all taken by the probe’s MapCam instrument, a medium-range camera designed to capture images of outgassing around Bennu and help map its surface in color. On this occasion, it snapped three beautiful pictures of Earth and the Moon. These images were all taken when the spacecraft was at a distance of approximately 5 million km (3 million mi) from Earth – about 13 times the distance between the Earth and the Moon.

*Black and white image of Earth taken by the OSIRIS-REx’s NavCam 1 instrument. Credit: NASA/OSIRIS-REx team and the University of Arizona*

As part of the OSIRIS-REx Camera Suite (OCAMS), which is operated by researchers at the University of Arizona, the CapCam has four color filters. To produce the image, three of them (b, v and w) were used as a blue, green and red filters and then stacked on top of each other. The Earth and Moon were each color-corrected, and the Moon was brightened to make it more easily visible.

A second image of planet Earth (shown above), was taken on September 22nd, 2017, by one of the probe’s navigational cameras (NavCam 1). As the name suggests, this instrument is intended to help OSIRIS-REx orient itself while making its journey to Bennu and while it studies the asteroid. This is done by tracking starfields in space (while in transit) and landmarks on Bennu’s surface once it has arrived.

The image was taken when OSIRIS-REx was at a distance of 110,000 km (69,000 mi) from Earth. This was just after the probe had completed an Earth gravity-assist maneuver, where it used Earth’s gravitational force to slingshot around its equator and pick up more speed. The original image (shown below) was rotated so that the North Pole would be pointed up and the entire image was enlarged to provide more detail.

As you can see in the altered image, North America is visible on the upper right portion, while Hurricane Maria and the remnants of Hurricane Jose are visible in the far upper-right. The acquisition of these images was the result of painstaking calculations and planning, which were performed in advance by engineers and navigation specialists on the mission team using software called Systems Tool Kit (STK).

*Original image taken by the OSIRIS-REx NavCam 1 of Earth. Credit: NASA/Goddard/University of Arizona/Lockheed Martin*

These plans were developed to ensure that the probe would be able to snap pictures with precise timing, which were then uploaded to the spacecraft’s computer weeks ahead of time. Within hours of the probe executing its gravity-assist maneuver, crews on the ground were treated to the first images from the spacecraft’s navigational cameras, which confirmed that the probe was following the right path.

The probe is scheduled to reach Bennu in December of 2018, with approach operations commencing this coming August. Bennu is also expected to make a close pass with Earth several centuries from now, and could even collide with us by then. But for the time being, it represents a major opportunity to study the history and evolution of the Solar System, since it is essentially a remnant left over from its formation.

By studying this asteroid up close, and bringing samples back to Earth for further study, the OSRIS-REx mission could help us understand how life began on Earth and where the Solar System as a whole is headed. But in the meantime, the probe has been able to provide us with some beautiful snapshots of Earth, which serve to remind us all of certain things.

Much like Voyager 1‘s “Pale Blue Dot” photo, seeing Earth from space helps to drive home the fact that life is rare and precious. It also reminds us that we, as a species, are all in this together and completely and utterly dependent on our planet and its ecosystems. Once in awhile, we need to be reminded of these things. Otherwise, we might do some stupid – like ruin it!

Further Reading: NASA

December 22, 2017 by Evan Gough

Yes Please! NASA is Considering a Helicopter Mission to Titan

In this illustration, the Dragonfly helicopter drone is descending to the surface of Titan. Image: NASA

The only thing cooler than sending a helicopter drone to explore Titan is sending a nuclear powered one to do the job. Called the “Dragonfly” spacecraft, this helicopter drone mission has been selected as one of two finalists for NASA’s robotic exploration missions planned for the mid 2020’s. NASA selected the Dragonfly mission from 12 proposals they were considering under their New Horizons program.

Titan is Saturn’s largest moon, and is a primary target in the search for life in our Solar System. Titan has liquid hydrocarbon lakes on its surface, a carbon-rich chemistry, and sub-surface oceans. Titan also cycles methane the way Earth cycles water.

This true-color image of Titan, taken by the Cassini spacecraft, shows the moon's thick, hazy atmosphere. Image: By NASA - http://photojournal.jpl.nasa.gov/catalog/PIA14602, Public Domain, https://commons.wikimedia.org/w/index.php?curid=44822294 — This true-color image of Titan, taken by the Cassini spacecraft, shows the moon’s thick, hazy atmosphere. Image: By NASA – http://photojournal.jpl.nasa.gov/catalog/PIA14602, Public Domain, https://commons.wikimedia.org/w/index.php?curid=44822294

Dragonfly would fulfill its mission by hopping around on the surface of Titan. Once an initial landing site is selected on Titan, Dragonfly will land there with the assistance of a ‘chute. Dragonfly will spend periods of time on the ground, where it will charge its batteries with its radioisotope thermoelectric generator. Once charged, it would then fly for hours at time, travelling tens of kilometers during each flight. Titan’s dense atmosphere and low gravity (compared to Earth) allows for this type of mission.

During these individual flights, potential landing sites would be identified for further scientific work. Dragonfly will return to its initial landing site, and only visit other sites once they have been verified as safe.

Dragonfly is being developed at the Johns Hopkins Applied Physics Laboratory (JHAPL.) It has a preliminary design weight of 450 kg. It’s a double quad-copter design, with four sets of dual rotors.

“Titan is a fascinating ocean world,” said APL’s Elizabeth Turtle, principal investigator for Dragonfly. “It’s the only moon in the solar system with a dense atmosphere, weather, clouds, rain, and liquid lakes and seas—and those liquids are ethane and methane. There’s so much amazing science and discovery to be done on Titan, and the entire Dragonfly team and our partners are thrilled to begin the next phase of concept development.”

The science objectives of the Dragonfly mission center around prebiotic organic chemistry and habitability on Titan. It will likely have four instruments:

Mass Spectrometer
Gamma-Ray Spectrometer
Atmospheric and Geophysical Sensors
Cameras

Being chosen as a finalist has the team behind Dragonfly excited for the project. “This brings us one step closer to launching a bold and very exciting space exploration mission to Titan,” said APL Director Ralph Semmel. “We are grateful for the opportunity to further develop our New Frontiers proposals and excited about the impact these NASA missions will have for the world.”

Exploring Titan holds a daunting set of challenges. But as we’ve seen in recent years, NASA and its partners have the capability to meet those challenges. The JHAPL team behind Dragonfly also designed and built the New Horizons mission to Pluto and the Kuiper Belt object 2014 MU69. Their track record of success has everyone excited about the Dragonfly mission.

The Dragonfly mission, and the other finalist—the Comet Astrobiology Exploration Sample Return being developed by Cornell University and the Goddard Space Flight Center—will each receive funding through the end of 2018 to work on the concepts. In the Spring of 2019, NASA will select one of them and will fund its continued development.

Dragonfly is part of NASA’s New Frontiers program. New Frontiers missions are planetary science missions with a cap of approximately $850 million. New Frontiers missions include the Juno mission to Jupiter, the Osiris-REx asteroid sample-return missions, and the aforementioned New Horizons mission to Pluto.

NASA’s Opportunity Rover Withstands Another Harsh Winter on Mars

Artist's impression of the Opportunity Rover, part of NASA's Mars Exploration Program. NASA/JPL-Caltech

When the Opportunity rover landed on Mars on January 25th, 2004, its mission was only meant to last for about 90 Earth days. But the little rover that could has exceeded all expectations by remaining in operation (as of the writing of this article) for a total of 13 years and 231 days and traveled a total of about 50 km (28 mi). Basically, Opportunity has continued to remain mobile and gather scientific data 50 times longer than its designated lifespan.

And according to a recent announcement from NASA’s Mars Exploration Program (MEP), the rover managed to survive yet another winter on Mars. Having endured the its eight Martian winter in a row, and with its solar panels in encouragingly clean condition, the rover will be in good shape for the coming dust-storm season. It also means the rover will live to see its 14th anniversary, which will take place on January 25th, 2018.

On Mars, a single year lasts the equivalent of 686.971 Earth days (or 1.88 Earth years). And since Mars’ axis is inclined 25.19° to its orbital plane (compared to Earth’s axial tilt of just over 23°), Mars also experiences seasons. However, these tend to last about twice as long as the seasons on Earth. And of course, the seasons on Mars’ are also much colder, with temperatures averaging about -63 °C (-82°F).

Enhanced-color view of ground sloping downward to the right in “Perseverance Valley”, taken by the Pancam on the Opportunity rover in October of 2017. Credits: NASA/JPL-Caltech/Cornell Univ./Arizona State Univ

As Jennifer Herman, the power subsystem operations team lead for Opportunity at NASA’s Jet Propulsion Laboratory, recalled in a NASA MEP press statement:

“I didn’t start working on this project until about Sol 300, and I was told not to get too settled in because Spirit and Opportunity probably wouldn’t make it through that first Martian winter. Now, Opportunity has made it through the worst part of its eighth Martian winter.”

At present, both the Opportunity and Spirit rover are in Mars’ southern hemisphere. Here, the Sun appears in the northern sky during the fall and winter, so the rovers need to tilt their solar-arrays northward. Back in 2004, the Spirit rover had lost the use of two of its wheels, and could therefore not maneuver out of a sand trap it had become stuck in. As such, it was unable to tilt itself northward and did not survive its fourth Martian winter (in 2009).

However, Opportunity’s current position – Perseverance Valley, a fluid-carved region on the inner slope at the edge of the Endeavour Crater – meant that it was well-positioned to keep working through late fall and early winter this year. This was ensured by the stops the rover made at energy-favorable locations, where it would inspect local rocks, examine the valley’s shape and image the surrounding area, all the while absorbing ample energy from the Sun.

Image of the floor of Endeavour Crater, taken by NASA’s Mars Exploration Rover Opportunity on Nov. 11th, 2017, about a week before Opportunity’s eighth Martian winter solstice. Credits: NASA/JPL-Caltech/Cornell Univ./Arizona State Univ

Five months ago, the rover entered the top of the valley, which runs eastward down the inner slope of the Endurance Crater’s western rim. Since that time, Opportunity has been conducting stops between drives at north-facing sites, which are situated along the southern edge of the channel. The rover team calls the sites “lily pads”, since these places are spots that the rover need to hop across during its mission.

This is necessary, given that Opportunity does not rely on a radioisotope thermoelectric generator like Curiosity does. While winter conditions affect the use of electrical heaters and batteries on both rovers, Opportunity is different in that it’s activities are more subject to seasonal change. Whereas Curiosity will simply allocate less energy to performing tasks in the winter, Opportunity needs to pick its routes to ensure it stays powered up.

During some of its previous winters, the Opportunity rover was not as well-situated as it currently is. During its fifth winter (2011-2012) the rover spent 19 weeks at one spot because no other places that allowed for a northward-facing tilt were available within driving distance. On the other hand, its first winter (2004-2005) was spent in the southern half of the Endurance Crater, where all grounds are favorable since they face north.

As the person who is chiefly responsible for advising other mission scientists on how much energy Opportunity has available on each Martian day (sol) for conducting activities like driving and observing – a task she performs for Curiosity as well – Herman understand the relationship between power usage and the seasons all too well. “Relying on solar energy for Opportunity keeps us constantly aware of the season on Mars and the terrain that the rover is on, more than for Curiosity,” she said.

*A self-portrait of the Opportunity rover shortly after dust cleared its solar panels in March 2014. Credit: NASA/JPL-Caltech/Cornell Univ./Arizona State Univ.*

Another factor which can influence Opportunity‘s power supply is how much dust is in the sky and how much of it gets onto the rover’s solar arrays. This is highly-dependent on prevailing wind conditions, which can both stir up dust storms and clear away dust deposits on the rover – basically, they are a real mixed blessing! During autumn and winter in the southern-hemisphere, the skies are generally clear where Opportunity operates.

Spring and summer is when the storms are most common in Mars’ southern hemisphere, though they don’t happen every year. The latest example took place in 2007, which led to a severe reduction in the amount of sunlight (and hence, solar energy) Spirit and Opportunity were able to receive. This required both rovers to enact emergency protocols and reduce the amount of operations and communications they conducted.

The amount of dust on the rover’s solar arrays going into autumn can also vary from year to year. This year, the array was dustier than in all but one of the previous Martian autumns it experienced. Luckily, as Herman explained, things worked out for the rover:

“We were worried that the dust accumulation this winter would be similar to some of the worst winters we’ve had, and that we might come out of the winter with a very dusty array, but we’ve had some recent dust cleaning that was nice to see. Now I’m more optimistic. If Opportunity’s solar arrays keep getting cleaned as they have recently, she’ll be in a good position to survive a major dust storm. It’s been more than 10 Earth years since the last one and we need to be vigilant.”

*Image of the Opportunity rover’s front wheel, taken on June 9th, 2004, inside the Endurance Crater. Credit: NASA/JPL/Cornell*

In the coming months, the Opportunity team hopes to investigate how the Perseverance Valley was cut into the rim of the Endeavor crater. As Matt Golombek, an Opportunity Project Scientist at JPL, related:

“We have not been seeing anything screamingly diagnostic, in the valley itself, about how much water was involved in the flow. We may get good diagnostic clues from the deposits at the bottom of the valley, but we don’t want to be there yet, because that’s level ground with no more lily pads.”

With its eighth winter finished and Opportunity still in good working order, we can expect the tenacious rover to keep turning up interesting finds on Mars. These include clues about Mars’ warmer, wetter past, which likely included a standing body of water in the Endeavor crater. And assuming conditions are favorable in the coming year, we can expect that Opportunity will continue to push the boundaries of both science and its own endurance!

Further Reading: NASA

November 21, 2017November 22, 2017 by Ken Kremer

SpaceX Resuming Launches from Damaged Pad 40 on Dec. 4 with Station Resupply Flight for NASA; Covert Zuma Remains on Hold

SpaceX Dragon CRS-9 was the last International Space Station resupply mission to lift off successfully from pad 40 on July 18, 2016, prior to the Cape Canaveral, FL, launch pad explosion with the Amos-6 payload that heavily damaged the pad and infrastructure on Sept. 1, 2016. Cargo launches for NASA will resume with Dragon CRS-13 in December 2017. Credit: Ken Kremer/kenkremer.com

KENNEDY SPACE CENTER, FL – After postponing last week’s liftoff of the covert ‘Zuma’ spy satellite due to last minute concerns about the reliability of the payload fairing encapsulating it while poised for liftoff at KSC pad 39, SpaceX is set to at last resume launches from their previously damaged and now repaired Cape Canaveral pad 40 with a cargo resupply mission for NASA to the International Space Station (ISS) on Dec 4.

NASA and SpaceX have jointly decided to move forward with the Dragon CRS-13 cargo blastoff apparently because the mission does not involve use of the problematical payload fairing that halted last weeks planned Falcon 9 launch with the rocket and the mysterious Zuma payload.

Zuma was ready and waiting at pad 39A for the GO to launch that never came.

Then after a series of daily delays SpaceX ultimately announced a ‘stand down’ for super secret Zuma at pad 39A on Friday, Nov. 17, for the foreseeable future.

SpaceX engineers also had to deal with the after effects of a fire that broke out on a Merlin engine test stand during preparations for a hot fire test that resulted from a leak during a ‘LOX drop’ that halted testing of the Block 5 version of the Merlin 1D.

SpaceX Falcon 9 rocket blastoff of clandestine Zuma spysat to low earth orbit for a classified US government customer is postponed indefinitely from Launch Complex 39A at the Kennedy Space Center, FL, from last targeted launch date of 17 Nov 2017. Credit: Ken Kremer/Kenkremer.com

Since SpaceX’s gumdrop shaped Dragon cargo freighter launches as a stand alone aerodynamically shielded spacecraft atop the Falcon 9, it does not require additional protection from atmospheric forces and friction housed inside a nose cone during ascent to orbit unlike satellites with many unprotected exposed surfaces, critical hardware and delicate instruments.

Thus Dragon is deemed good to go since there currently appear to be no other unresolved technical issues with the Falcon 9 rocket.

“NASA commercial cargo provider SpaceX is targeting its 13th commercial resupply services mission to the International Space Station for no earlier than 2:53 p.m. EST Monday, Dec. 4,” NASA announced on the agency blog and social media accounts.

The Dec. 4 launch date for Dragon CRS-13 was announced by NASA’s space station manager Dan Hartman during the Orbital ATK Antares/Cygnus launch campaign that culminated with a successful blastoff last Sunday, Nov 12 from NASA’s Wallops Flight Facility on Virginia’s eastern shore.

But the targeted Dec 4 liftoff from Space Launch Complex 40 on Cape Canaveral Air Force Station, FL, was cast in doubt after SpaceX disclosed the payload fairing issue related launch delay on Friday.

Since last week SpaceX engineers have been busy taking the time to carefully scrutinize all the pertinent fairing data before proceeding with the top secret Zuma launch.

“We have decided to stand down and take a closer look at data from recent fairing testing for another customer,” said SpaceX spokesman John Taylor last Friday.

Covert Zuma spysat is encapsulated inside the nose cose at the top of the SpaceX Falcon 9 rocket in this up-close view from Launch Complex 39A at the Kennedy Space Center, FL, taken on Nov. 17, 2017. An unresolved issue with the nose cone caused indefinite launch postponement. Credit: Ken Kremer/Kenkremer.com

All of SpaceX’s launches this year from Florida’s Spaceport have taken place from NASA’s historic Launch Complex-39A at the Kennedy Space Center.

Pad 39A became SpaceX’s only operational Florida Space Coast launch pad following a catastrophic launch pad accident last year on Sept. 1, 2016 that took place during a routine fueling test that suddenly ended in a devastating explosion and fire that completely consumed the Falcon 9 rocket and Amos-6 payload and heavily damaged the pad and support infrastructure.

Aerial view of pad and strongback damage at SpaceX Launch Complex-40 as seen from the VAB roof on Sept. 8, 2016 after fueling test explosion destroyed the Falcon 9 rocket and AMOS-6 payload at Cape Canaveral Air Force Station, FL on Sept. 1, 2016. Credit: Ken Kremer/kenkremer.com

Since the Amos-6 accident workers raced to finish refurbishments to NASA’s long dormant pad 39A to transform into operational status and successfully launched a dozen missions this year.

Simultaneously additional crews have been hard at work to repair damaged pad 40 so that flights can resume there as soon as possible for the bulk of NASA, commercial and military contracted missions.

Meanwhile SpaceX wants to upgrade pad 39A to launch the Falcon Heavy and crewed Dragon flight. But those launches cant take place until pad 40 resumes operational status.

The Dragon CRS-13 mission was recently announced as the maiden mission for the reopening of pad 40.

Altogether Dragon CRS-13 will count as the fourth SpaceX Dragon liftoff of 2017.

The 20-foot high, 12-foot-diameter Dragon CRS-13 vessel will carry about 3 tons of science and supplies to the orbiting outpost and stay about 4 weeks.

It will be a reused Dragon that previously flew on the CRS-6 mission.

“The Dragon [CRS-13] spacecraft will spend about a month attached to the space station,” NASA said.

SpaceX Falcon 9 rocket goes erect to launch position atop Launch Complex 39A at the Kennedy Space Center on 1 Jun 2017 as seen the morning before later afternoon launch from inside from the pad perimeter. Liftoff of the CRS-11 resupply mission to the International Space Station (ISS) slated for 1 June 2017. Credit: Ken Kremer/Kenkremer.com

The prior Dragon CRS-12 resupply ship launched from pad 39A on Aug. 14, 2017 from KSC pad 39A and carried 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.

Dragon CRS-9 was the last ISS resupply mission to launch from pad 40 on July 18, 2016.

The recently arrived Orbital ATK Cygnus cargo ship is expected to depart the station from the Earth facing Unity node on Dec. 3 to make way for Dragon’s berthing at the Harmony node.

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

Watch for Ken’s continuing onsite coverage of SpaceX CRS-13, Zuma and KoreaSat-5A & Orbital ATK OA-8 Cygnus 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.

Ken Kremer

Up close view of SpaceX Dragon CRS-9 resupply ship and solar panels atop Falcon 9 rocket at pad 40 prior to blastoff to the ISS on July 18, 2016 from Cape Canaveral Air Force Station, Florida. Credit: Ken Kremer/kenkremer.com

SpaceX Falcon 9 launches and lands over Port Canaveral in this streak shot showing rockets midnight liftoff from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida at 12:45 a.m. EDT on July 18, 2016 carrying Dragon CRS-9 craft to the International Space Station (ISS) with almost 5,000 pounds of cargo and docking port. View from atop Exploration Tower in Port Canaveral. Credit: Ken Kremer/kenkremer.com

November 18, 2017November 19, 2017 by Ken Kremer

Station Astronauts Unload Cygnus Science; Antares Launch Gallery

Orbital ATK Antares rocket lifts off 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 to the International Space Station. Credit: Ken Kremer/kenkremer.com

NASA WALLOPS FLIGHT FACILITY, VA – Astronauts aboard the International Space Station are now busily unloading nearly four tons of science experiments, research gear, station equipment and crew supplies – following the spectacular launch of the Orbital ATK Antares rocket earlier this week on Sunday Nov. 12 from Virginia’s eastern shore that propelled the Cygnus cargo freighter to an on time arrival two days later on Tuesday Nov. 14.

The Orbital ATK Cygnus spacecraft was christened the S.S. Gene Cernan and named in honor of NASA’s Apollo 17 lunar landing commander; Gene Cernan.

Among the goodies delivered by the newly arrived S.S. Gene Cernan Cygnus OA-8 supply run to resident the crew of six astronauts and cosmonauts from the US, Russia and Italy are ice cream, pizza and presents for the holidays. They are enjoying the fruits of the earthy labor of thousands of space workers celebrating the mission’s success.

The six-member Expedition 53 crew poses for a portrait inside the Japanese Kibo laboratory module with the VICTORY art spacesuit that was hand-painted by cancer patients in Russia and the United States. On the left (from top to bottom) are NASA astronauts Joe Acaba and Mark Vande Hei with cosmonaut Alexander Misurkin of Roscosmos. On the right (from top to bottom) are European Space Agency astronaut Paolo Nespoli, cosmonaut Sergey Ryazanskiy of Roscosmos and Expedition 53 Commander Randy Bresnik of NASA. Credit: NASA/ESA/Roscosmos

The journey began with the flawless liftoff of the two stage Antares rocket shortly after sunrise Sunday at 7:19 a.m. EST, Nov. 12, rocket from Pad-0A at NASA’s Wallops Flight Facility in Virginia.

Check out the expanding gallery of launch imagery and videos captured by this author and several space colleagues of Antares prelaunch activities around the launch pad and through Sunday’s stunningly beautiful sunrise blastoff.

After a carefully choreographed series of intricate thruster firings to raise its orbit in an orbital pursuit 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.

The Orbital ATK Cygnus OA-8 spacecraft is pictured after it had been grappled with the Canadarm2 robotic arm by astronauts Paolo Nespoli and Randy Bresnik on Nov. 14, 2017. Credit: NASA

Expedition 53 Flight Engineer Paolo Nespoli of ESA (European Space Agency) assisted by NASA astronaut Randy Bresnik then deftly maneuvered the International Space Station’s 57.7-foot-long (17.6 meter-long) Canadarm2 robotic arm to grapple and successfully capture the Cygnus cargo freighter at 5:04 a.m., Tuesday Nov. 14.

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.

Ground controllers at NASA’s Mission Control at the Johnson Space Center in Texas, then maneuvered the arm and robotic hand grappling Cygnus towards the exterior hull and berthed the cargo ship at the Earth-facing port of the stations Unity module.

The berthing operation was completed at 7:15 a.m. after all 16 bolts were driven home for hard mating as the station was flying 252 miles over the North Pacific in orbital night.

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.

Launch of Orbital ATK Antares rocket and Cygnus resupply ship on Nov. 12, 2017 from NASA Wallops in Virginia to the International Space Station. Credit: Trevor Mahlmann

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.

Apollo 17 was NASA’s final lunar landing mission. Gere Cernan was the last man to walk on the Moon.

A portrait of Gene Cernan greets the astronauts as they open the hatch to the Cygnus cargo spacecraft named in his honor. Credit: NASA

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.

Cygnus will remain at the space station until Dec. 4, when the spacecraft will depart the station and release 14 CubeSats using a NanoRacks deployer, a record number for the spacecraft.

It will then be commanded to fire its main engine to lower its orbit and carry out a fiery and destructive re-entry into Earth’s atmosphere over the Pacific Ocean as it disposes of several tons of trash.

The Cygnus OA-8 manifest includes:

Crew Supplies 2,734.1 lbs. / 1,240 kg
Science Investigations 1631.42 lbs. / 740 kg
Spacewalk Equipment 291.0 lbs. / 132 kg
Vehicle Hardware 1,875.2 lbs. / 851 kg
Computer Resources 75.0 lbs. / 34 kg

Total Cargo: 7,359.0 lbs. / 3,338 kg
Total Pressurized Cargo with Packaging: 7,118.7 lbs. / 3,229 kg
Unpressurized Cargo (NanoRacks Deployer): 240.3 lbs. / 109 kg

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.

Orbital ATK Antares rocket and Cygnus spacecraft on the launch pad prior to blastoff for International Space Station on Nov. 12, 2017 from NASA’s Wallops Flight Facility in Virginia. Credit: Peter Kremer

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.

Orbital ATK’s Antares rocket and S.S. Gene Cernan Cygnus OA-8 resupply ship pierce the oceanside clouds over NASA Wallops Flight Facility in Virginia, after sunrise liftoff on Nov. 12, 2017 bound for the ISS. Credit: Ken Kremer/kenkremer.com

Stay tuned here for Ken’s continuing Earth and Planetary science and human spaceflight news.

Ken Kremer

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.com

Sunset 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 Orbital ATK Antares rocket topped with the Cygnus OA-8 spacecraft creates a beautiful water reflection in this prelaunch nighttime view across the inland waterways. Launch is targeted for Nov. 11, 2017, at NASA’s Wallops Flight Facility in Virginia. Credit: Ken Kremer/kenkremer.com

Hardware for the Orbital ATK Antares rocket launching the Cygnus OA-8 resupply mission to the International Space Station on Nov. 11, 2017 – as it was being assembled for flight inside the Horizontal Integration Facility at NASA’s Wallops Flight Facility. Credit: Ken Kremer/kenkremer.com

Orbital ATK Cygnus OA-8 mission patch. Credit: Orbital ATK

November 17, 2017 by Matt Williams

Planet With Lava Oceans Also has an Atmosphere, Says New Study

This illustration shows the super-Earth exoplanet 55 Cancri e with its star. What would our Solar System be like if it was home to a super-Earth like this one? Credit: NASA/JPL

The super-Earth 55 Cancri e (aka. Janssen) is somewhat famous, as exoplanet go. Originally discovered in 2004, this world was one of the few whose discovery predated the Kepler mission. By 2016, it was also the first exoplanet to have its atmosphere successfully characterized. Over the years, several studies have been conducted on this planet that revealed some rather interesting things about its composition and structure.

For example, scientists believed at one time that 55 Cancri e was a “diamond planet“, whereas more recent work based on data from the Spitzer Space Telescope concluded that its surface was covered in lakes of hot lava. However, a new study conducted by scientists from NASA’s Jet Propulsion Laboratory indicates that despite its intense surface heat, 55 Cancri e has an atmosphere that is comparable to Earth’s, only much hotter!

The study, titled “A Case for an Atmosphere on Super-Earth 55 Cancri e“, recently appeared in The Astrophysical Journal. Led by Isabel Angelo (a physics major with UC Berkeley) with the assistance of Renyu Hu – a astronomer and Hubble Fellow with JPL and Caltech – the pair conducted a more detailed analysis of the Spitzer data to determine the likelihood and composition of an atmosphere around 55 Cancri e.

*Artist’s impression of the super-Earth 55 Cancri e in front of its parent star. Credit: ESA/NASA*

Previous studies of the planet noted that this super-Earth (which is twice as large as our planet), orbits very close to its star. As a result, it has a very short orbital period of about 17 hours and 40 minutes and is tidally locked (with one side constantly facing towards the star). Between June and July of 2013, Spitzer observed 55 Cancri e and obtained temperature data using its special infrared camera.

Initially, the temperature data was seen as being an indication that large deposits of lava existed on the surface. However, after re-analyzing this data and combining it with a new model previously develop by Hu, the team began to doubt this explanation. According to their findings, the planet must have a thick atmosphere, since lava lakes exposed to space would create hots spots of high temperatures.

What’s more, they also noted that the temperature differences between the day and night side were not as significant as previously thought – another indication of an atmosphere. By comparing changes in the planet’s brightness to energy flow models, the team concluded that an atmosphere with volatile materials was the best explanation for the high temperatures. As Renyu Hu explained in a recent NASA press statement:

“If there is lava on this planet, it would need to cover the entire surface. But the lava would be hidden from our view by the thick atmosphere. Scientists have been debating whether this planet has an atmosphere like Earth and Venus, or just a rocky core and no atmosphere, like Mercury. The case for an atmosphere is now stronger than ever.”

Using Hu’s improved model of how heat would flow throughout the planet and radiate back into space, they found that temperatures on the day side would average about 2573 K (2,300 °C; 4,200 °F). Meanwhile, temperatures on the “cold” side would average about 1573 – 1673 K (1,300 – 1,400 °C; 2,400 – to 2,600 °F). If the planet had no atmosphere, the differences in temperature would be far more extreme.

As for the composition of this atmosphere, Angelo and Hu revealed that it is likely similar to Earth’s – containing nitrogen, water and even oxygen. While much hotter, the atmospheric density also appeared to be similar to that of Earth, which suggests the planet is most likely rocky (aka. terrestrial) in composition. On the downside, the temperatures are far too hot for the surface to maintain liquid water, which makes habitability a non-starter.

Ultimately, this study was made possible thanks to Hu’s development of a method that makes the study exoplanet atmospheres and surfaces easier. Angelo, who led the study, worked on it as part of her internship with JPL and adapted Hu’s model to 55 Cancri e. Previously, this model had only been applied to mass gas giants that orbit close to their respective suns (aka. “Hot Jupiters”).

Naturally, there are unresolved questions that this study helps to raise, such as how 55 Cancri e has avoided losing its atmosphere to space. Given how close the planet orbits to its star, and the fact that it’s tidally locked, it would be subject to intense amounts of radiation. Further studies may help to reveal how this is the case, and will help advance our understanding of large, rocky planets.

The application of this model to a Super-Earth is the perfect example of how exoplanet research has been evolving in recent years. Initially, scientists were restricted to studying gas giants that orbit close to their stars (as well as their respective atmospheres) since these are the easiest to spot and characterize. But thanks to improvements in instrumentation and methods, the range of planets we are capable of studying is growing.

Further Reading: NASA, The Astrophysical Journal

November 17, 2017November 19, 2017 by Matt Williams

When James Webb Finally Reaches Space, Here’s What it’ll be Hunting

Artist conception of the James Webb Space Telescope. Credit: NASA

Ever since the project was first conceived, scientists have been eagerly awaiting the day that the James Webb Space Telescope (JWST) will take to space. As the planned successor to Hubble, the JWST will use its powerful infrared imaging capabilities to study some of the most distant objects in the Universe (such as the formation of the first galaxies) and study extra-solar planets around nearby stars.

However, there has been a lot of speculation and talk about which targets will be the JWST’s first. Thankfully, following the recommendation of the Time Allocation Committee and a thorough technical review, the Space Telescope Science Institute (STScI) recently announced that it has selected thirteen science “early release” programs, which the JWST will spend its first five months in service studying.

As part of the JWST Director’s Discretionary Early Release Science Program (DD-ERS), these thirteen targets were chosen by a rigorous peer-review process. This consisted of 253 investigators from 18 counties and 106 scientific institutions choosing from over 100 proposals. Each program has been allocated 500 hours of observing time, once the 6-month commissioning period has ended.

*The JWST’s Optical Telescope element/Integrated Science instrument module (OTIS) undergoing testing at NASA’s Johnson Space Center. Credit: NASA/Desiree Stover*

As Ken Sembach, the director of the Space Telescope Science Institute (STScI), said in an ESA press statement:

“We were impressed by the high quality of the proposals received. These programmes will not only generate great science, but will also be a unique resource for demonstrating the investigative capabilities of this extraordinary observatory to the worldwide scientific community… We want the research community to be as scientifically productive as possible, as early as possible, which is why I am so pleased to be able to dedicate nearly 500 hours of director’s discretionary time to these early release science observations.”

Each program will rely on the JWST’s suite of four scientific instruments, which have been contributed by NASA, the European Space Agency (ESA) and the Canadian Space Agency (CSA). These include the the Near-Infrared Spectrograph (NIRSpec) and the Mid-Infrared Instrument (MIRI) developed by the ESA, as well as the Near-Infrared Camera (NIRCam) developed by NASA and the STScI, and the Near-Infrared Imager and Slitless Spectrograph (NIRISS) developed by the CSA.

The thirteen programs selected include “Through the looking GLASS“, which will rely on the astronomical community’s experience using Hubble to conduct slitless spectroscopy and previous surveys to gather data on galaxy formation and the intergalactic medium, from the earliest epochs of the Universe to the present day. The Principal Investigator (PI) for this program is Tommaso Treu of the University of California Los Angeles.

*Once deployed, the JWST will conduct a variety of science missions aimed at improving our understanding of the Universe. Credit: NASA/STScI*

Another is the Cosmic Evolution Early Release Science (CEERS) program, which will conduct overlapping observations to create a coordinated extragalactic survey. This survey is intended to let astronomers see the first visible light of the Universe (ca. 240,000 to 300,000 years after the Big Bang), as well as information from the Reionization Epoch (ca. 150 million to 1 billion years after the Big Bang) and the period when the first galaxies formed. The PI for this program is Steven Finkelstein of the University of Texas at Austin.

Then there’s the Transiting Exoplanet Community Early Release Science Program, which will build on the work of the Hubble, Spitzer, and Kepler space telescopes by conducting exoplanet surveys. Like its predecessors, this will consist of monitoring stars for periodic dips in brightness that are caused by planets passing between them and the observer (aka. Transit Photometry).

However, compared to earlier missions, the JWST will be able to study transiting planets in unprecedented detail, which is anticipated to reveal volumes about their respective atmospheric compositions, structures and dynamics. This program, for which the PI is Imke de Pater from the University of California Berkeley, is therefore expected to revolutionize our understanding of planets, planet formation, and the origins of life.

Also focused on the study of exoplanets is the High Contrast Imaging of Exoplanets and Extraplanetary Systems program, which will focus on directly imaged planets and circumstellar debris disks. Once again, the goal is to use the JWST’s enhanced capabilities to provide detailed analyses on the atmospheric structure and compositions of exoplanets, as well as the cloud particle properties of debris disks.

*Artist’s impression of the planet orbiting a red dwarf star. Credit: ESO/M. Kornmesser*

But of course, not all the programs are dedicated to the study of things beyond our Solar System, as is demonstrated by the program that will focus on Jupiter and the Jovian System. Adding to the research performed by the Galileo and Juno missions, the JWST will use its suite of instruments to characterize and produce maps of Jupiter’s cloud layers, winds, composition, auroral activity, and temperature structure.

This program will also focus on some of Jupiter’s largest moons (aka. the “Galilean Moons”) and the planet’s ring structure. Data obtained by the JWST will be used to produce maps of Io’s atmosphere and volcanic surface, Ganymede’s tenuous atmosphere, provide constrains on these moons thermal and atmospheric structure, and search for plumes on their surfaces. As Alvaro Giménez, the ESA Director of Science, proclaimed:

“It is exciting to see the engagement of the astronomical community in designing and proposing what will be the first scientific programs for the James Webb Space Telescope. Webb will revolutionize our understanding of the Universe and the results that will come out from these early observations will mark the beginning of a thrilling new adventure in astronomy.”

During its mission, which will last for a minimum of five years (barring extensions), the JWST will also address many other key topics in modern astronomy, probing the Universe beyond the limits of what Hubble has been capable of seeing. It will also build on observations made by Hubble, examining galaxies whose light has been stretched into infrared wavelengths by the expansion of space.

*The James Webb Space Telescope’s 18-segment primary mirror, a gold-coated beryllium mirror has a collecting area of 25 square meters. Credit: NASA/Chris Gunn*

Beyond looking farther back in time to chart cosmic evolution, Webb will also examine the Supermassive Black Holes (SMBH) that lie at the centers of most massive galaxies – for the purpose of obtaining accurate mass estimates. Last, but not least, Webbwill focus on the birth of new stars and their planets, initially focusing on Jupiter-sized worlds and then shifting focus to study smaller super-Earths.

John C. Mather, the Senior Project Scientist for the JWST and a Senior Astrophysicist at NASA’s Goddard Space Flight Center, also expressed enthusiasm for the selected programs. “I’m thrilled to see the list of astronomers’ most fascinating targets for the Webb telescope, and extremely eager to see the results,” he said. “We fully expect to be surprised by what we find.”

For years, astronomers and researchers have been eagerly awaiting the day when the JWST begins gathering and releasing its first observations. With so many possibilities and so much waiting to be discovered, the telescope’s deployment (which is scheduled for 2019) is an event that can’t come soon enough!

Further Reading: ESA, STScI

November 15, 2017November 16, 2017 by Ken Kremer

S.S Gene Cernan Honoring Last Moonwalker Arrives at International Space Station Carrying Tons of Research Gear and Supplies

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 S.S. Gene Cernan Cygnus spacecraft named in honor of the Apollo 17 lunar landing commander and launched by Orbital ATK from the eastern shore of Virgina at breakfast time Sunday, Nov. 12, arrived at the International Space Station early Tuesday morning, Nov 14, carrying over 3.7 tons of research equipment and supplies for the six person resident crew.

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.

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.

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!

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

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.

Ken Kremer

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

………….

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