Posted on by Fraser Cain

Is Phobos Doomed?

Is Phobos Doomed?

What fate awaits Phobos, one of the moons of Mars?

“All these worlds are yours except Europa, attempt no landing there.”

As much as I love Arthur C. Clarke and his books, I’ve got to disagree with his judgement on which moons we should be avoiding. Europa is awesome. It’s probably got a vast liquid ocean underneath its icy surface. There might even be life swimming down there, ready to be discovered. Giant freaky Europa whales or some kind of alien sharknado. Oh man, I just had the BEST idea for a movie.

So yea, Europa’s fine. The place we should really be avoiding is the Martian Moon Phobos. Why? What’s wrong with Phobos? Have I become some kind of Phobo…phobe? Is there any good reason to avoid this place?

Well first, its name tells us all we need to know. Phobos is named for the Greek god of Horror, and I don’t mean like the usual gods of horror as in Clive Barker, John Carpenter or Wes Craven, I mean that Phobos is the actual personification of Fear… possibly with a freaky lion’s head. And… there’s also the fact that Phobos is doomed.

Literally doomed. Living on borrowed time. Its days are numbered. It’s been poisoned and there’s no antidote. It’s got metal shards in its heart and the battery on it’s electro-magnet is starting to brown out. More specifically, in a few million years, the asteroid-like rock is going to get torn apart by the Martian gravity and then get smashed onto the planet.

The streaked and stained surface of Phobos. (Image: NASA)
The streaked and stained surface of Phobos. (Image: NASA)

It all comes down to tidal forces. Our Moon takes about 27 days to complete an orbit, and our planet takes around 24 hours to complete one rotation on its axis. Our Moon is pulling unevenly on the Earth and slowing its rotation down.

To compensate, the Moon is slowly drifting away from us. We did a whole episode about this which we’ll link at the end of the episode. On Mars, Phobos only takes 8 hours to complete an orbit around the planet. While the planet takes almost 25 hours to complete one rotation on its axis. So Phobos travels three times around the planet for every Martian day. And this is a problem.

It’s actually speeding up Mars’ rotation. And in exchange, it’s getting closer and closer to Mars with every orbit. The current deadpool gives the best odds on Phobos taking 30 to 50 million years to finally crash into the planet. The orbit will get lower and lower until it reaches a level known as the Roche Limit. This is the point where the tidal forces between the near and far sides of the moon are so different that it gets torn apart. Then Mars will have a bunch of teeny moons from the former Phobos.

Mars with rings of moon dust after the fall of one of its moons, Phobos. (Photo Credit: © Hive Studios)
Mars with rings of moon dust after the fall of one of its moons, Phobos.
(Photo Credit: © Hive Studios)

And then good news! Those adorable moonlets will get further pulverized until Mars has a ring. But then bad news… that ring will crash onto the planet in a cascade of destruction to be described as “the least fun balloon drop of all time”. So, you probably wouldn’t want to live on Mars then either.

Count yourself lucky. What were the chances that we would exist in the Solar System at a time that Phobos was a thing, and not a string of impacts on the surface of Mars.

Enjoy Phobos while you can, but remember that real estate there is temporary. Might I suggest somewhere in the alien sharknado infested waters of Europa instead?

What do you think. Did Arthur C Clarke have it wrong? Should we explore Europa?

And if you like what you see, come check out our Patreon page and find out how you can get these videos early while helping us bring you more great content!

Posted on by Bob King

Curiosity Rover Snaps Photos of Comet Siding Spring, Giant Sunspot and Mars-shine

It's not much, but it's the clearest view taken by NASA's Curiosity Rover of C/2013 A1 Siding Spring as it passed near Mars on October 19th. The comet is the fuzzy streak moving from right to left. Click for a full-sized view. Credit: NASA/JPL-Caltech/MSSS/TAMU

NASA’s Curiosity Rover spends most of its time staring at the ground, but like humans, it looks up once in a while too. As reported earlier, NASA ground controllers pointed the rover’s Mast Camera (mastcam) skyward to shoot a series of photos of Comet Siding Spring when it passed closest to the Red Planet on October 19th.  Until recently, noise-speckled pictures available on the raw image site confounded interpretation. Was the comet there or wasn’t it?  In these recently released versions, the fuzzy intruder is plain to see, tracking from right to left across the field of view. 

Remember the monster sunspot group on bold display during last month's partial solar eclipse. It was the largest group of the current solar cycle. Here it is again - returning for a second time - as seen by Curiosity on November 10th. Credit: NASA/JPL-Caltech
Remember the monster sunspot group on bold display during last month’s partial solar eclipse? It was the largest group of the current solar cycle and largest recorded in 24 years. Here it is again (lower left) – returning for a second time – as seen by Curiosity on November 10th. Click for raw version. Credit: NASA/JPL-Caltech

Ten exposures of 25 seconds each were taken between 4:33 p.m. and 5:54 p.m. CDT on October 19th to create the animation.  The few specks you see are electronic noise, but the sharp, bright streaks are stars that trailed during the time exposure. Curiosity’s Mastcam camera system has dual lenses –  a 100mm f/10 lens with a 5.1° square field of view and a 34mm, f/8 lens with a 15° square field of view. NASA didn’t include the information about which camera was used to make the photos, but if I had to guess, the faster, wide-angle view would be my choice. Siding Spring was moving relatively quickly across the Martian sky at closest approach.

Sunspot region 2192 (lower left) has returned for an encore in this photo taken by NASA's Solar Dynamics Observatory. The same group is visible in images taken 4 days earlier from Mars. Credit: NASA/SDO
Sunspot region 2192 (lower left) has returned for an encore in this photo taken by NASA’s Solar Dynamics Observatory. The same group is visible in images taken 4 days earlier from Mars. Credit: NASA/SDO

Prowling through the Curiosity raw image files, I came across this photo of the Sun on November 10th. Three dark spots at the left are immediately obvious and a dead-ringer for Active Region 2192, now re-named 2209 as it rounds the Sun for Act II.  You’ll recall this was the sunspot group that nearly stole the show during the October 23rd partial solar eclipse. From Mars’ perspective, which currently allows Curiosity to see further around the solar “backside”, AR 2209 showed up a few days before it was visible from Earth.

Mars Earth line of sight nov 10 final V2
Because of Mars’ position relative to the Sun, Curiosity saw the return of sunspot group 2192 before it was visible from Earth. The Sun had to rotate about another 4 days to carry the group into Earth’s line of sight. Source: Solarsystemscope with additions by the author

Although it’s slimmed down in size, the region is still large enough to view with the naked eye through a safe solar filter. More importantly, it possesses a complex beta-gamma-delta magnetic field where magnetic north and south poles are in close proximity and ripe for reconnection and production of M-class and X-class flares. Already, the region’s crackled with three moderate M-class flares over the past two days. In no mood to take a back seat, AR 2209 continues to dominate solar activity even during round two.

Phobos is very small but big enough for someone on the surface to see its shape with the naked eye, especially when the moon is high in the sky and closest to the observer. Then, it spans 1/3 the diameter of our Moon. Credit: NASA/JPL-Caltech
Phobos is very small but orbits close enough for someone on the surface to see its shape with the naked eye, especially when it’s high in the sky and closest to the observer. Phobos is about 1/3 the size of our Moon. This photo was taken by Curiosity on October 20th and shows the moon’s largest crater, Stickney, at top.  Credit: NASA/JPL-Caltech with toning by the author to bring out details

Mars possesses two small moons, Deimos and Phobos. Curiosity has photographed them both before including an occultation Deimos (9 miles/15 km) by the larger Phobos (13.5 miles/22 km). Phobos orbits closer to Mars than any other moon does to its primary in the Solar System, just 3,700 miles (6,000 km). As a result, it moves too fast for Mars’ rotation to overtake it the way Earth’s rotation overtakes the slower-moving Moon, causing it to set in the west overnight. Contrarian Phobos rises in the western sky and sets in the east just 4 hours 15 minutes later. When nearest the horizon and farthest from an observer, it’s apparent size is just 0.14º. At the zenith it grows to 0.20º of 1/3 the diameter of the Moon.

Phobos occults Deimos in real time photographed by the Curiosity Rover on August 1, 2013. Credit: NASA/JPL-Caltech
Phobos occults Deimos in real time photographed by the Curiosity Rover on August 1, 2013. Credit: NASA/JPL-Caltech

One longish observing session on the planet would cover a complete rise-set cycle during which Phobos would first appear as a crescent and finish up a full moon a few hours later. All this talk about Phobos is only meant to direct you to the picture above taken by Curiosity on October 20, 2014 when the moon was a thick crescent. As on Earth, where Earthshine fills out the remainder of the crescent Moon, so too does Mars-shine provide enough illumination to see the full outline of Phobos.

Four-wheel drive only. Curiosity took this photo showing a sea of dark dune from the Pahrump Hills outcrop on November 13th. Credit: NASA/JPL-Caltech
Four-wheel drive only! Curiosity took this photo showing a sea of dark dunes from the Pahrump Hills outcrop on November 13th. Credit: NASA/JPL-Caltech

Curiosity has also photographed Earth, sunsets and transits of Phobos across the Sun while rambling across the dusty red landscape since August 2012. Before we depart, it seems only fair to aim our gaze Mars-ward again to see what’s up. Or down. The rover’s been doing a geological “Walkabout” in the Pahrump Hills outcrop at the base of Mt. Sharp in Gale Crater since September. Earlier this fall it drilled and sampled rock there containing more hematite than at any of its previous stops. Hematite is an iron oxide that’s often associated with water.

The mission may spend weeks or months at the outcrop looking for and drilling new target rocks before moving further up the geological layer cake better known as Mt. Sharp.

Posted on by Tim Reyes

China Reveals Designs for Mars Rover Mission

A mock-up of a future Chinese Martian rover was displayed at the International Industry Fair in Shanghai (Credit: South China Morning Post)

For many space-faring nations, ambitions for Mars run broad and deep. Now, add China to the list of countries with Mars in their sights. News reports from China disclosed that country is considering a future Mars rover mission, with a potential 2020 launch date. Additionally came other hints that China may be looking to develop a next-generation heavy-lift launch system.

This new project, while early in development, reveals how Chinese aspirations are growing rapidly. Human space flight successes have been followed by recent lunar mission successes of the Yutu lunar rover and the Chang’e-5 T1 test of a sample return mission. The Chinese Mars missions could influence future plans of ESA, India and NASA or more simply raise the urgency to execute missions in concept or early development without hesitation.

China View reporter Lai Yuchen is seen describing and pointing out the future Sino-Mars rover with plans for a 2020 launch coinciding with the NASA/JPL Mars 2020 rover mission . (Click still image for video Link) (Photo/Video Credit: China View)
China View reporter Lai Yuchen is seen describing and pointing out the future Sino-Mars rover with plans for a 2020 launch coinciding with the NASA/JPL Mars 2020 rover mission . (Click still image for video Link) (Photo/Video Credit: China View)

The Mars rover mock-up display was presented at the aerospace show by China Aerospace Science and Technology Corporation (CASC). The design appears similar to the Yutu rover which landed successfully on the Moon late in 2013. While Yutu’s mobility system failed prematurely, many mission milestones were achieved.

The Mars rover design is significantly larger than Yutu but includes changes that can be attributed to the challenges of roving Mars at tens of millions of kilometers distance and under more gravitational force. The wheels are beefed up, since it must withstand more force and rugged martian terrain (gravity on Mars is 37% of the Earth’s in strength but 2.25 times the strength of gravity on the Moon’s surface.) The the solar panels are larger due to 1.) less sunlight at Mars – 35% to 50% of Earth’s, and 2.) more electrically demanding instruments.

The goals of the Chinese Mars rover will be to search for life and water. The NASA missions searching for indicators of habitable environments and for water has cost billions of dollars but the Chinese space program is operating on a fraction of what NASA’s annual budget is. Whereas the Chinese Mars program will be competing with the lunar program for government funds, it remains to be seen how quickly they can make progress and actually meet milestones for a 2020 launch date.

Besides video of the China View reporter presenting and discussing the Mars rover (link to photo above), the video also includes a simulation of the Chinese lunar sample return spacecraft, which is underdevelopment and was tested early this month during a the Chang’e-5 T1 circum-lunar mission that proved a small re-entry vehicle.

The future Chinese rover would be nearly as large as the MER rovers. Full scale models of all three NASA/JPL Mars rovers are shown here - Mars Pathfinder, MER and MSL in a JPL Mars yard with engineers. (Photo Credit: NASA/JPL)
The future Chinese rover would be nearly as large as the MER rovers. Full scale models of all three NASA/JPL Mars rovers are shown here – Mars Pathfinder, MER and MSL in a JPL Mars yard with engineers. (Photo Credit: NASA/JPL)

The actual dimensions of this rover were not reported but an estimate of the size can be determined by the size of the high-gain directional antenna. Assuming it is an X-Band dish, like the one on the MER Rovers and Curiosity, then this Sino-rover would be near the same size as the MER rovers – Spirit and Opportunity. The Sino-rover shares a six wheel design like MER and MSL rovers.

Other reports from the China Daily indicated that industry leaders in China are urging China’s space agency to develop a more powerful heavy-lift launch system. It could be used for the nation’s human spaceflight goals to send a space station in to orbit, as well as send missions to Mars and beyond.

“It is a must for us to develop a more powerful heavy-lift rocket if we want to reach and explore deep space,” Zhang Zhi, a senior rocket researcher at the China Academy of Launch Vehicle Technology the aerospace exhibition.

Plans also call for an orbiter to likely function as a communication relay as MGS, Mars Odyssey and MRO have done for the American rovers. Whether this would involve a single spacecraft such as the NASA Vikings or dual crafts such as the present American rovers with supporting orbiters is unknown. Given the successful landing of the Yutu rover encapsuled in a soft-lander, one might expect the same for the Chinese Mars rover rather than an airbag landing used by MER. Either way, they will be challenged by the seven minutes of terror just like the American rovers. They will have to solve for themselves the entry, descent and landing of a rover. Only American-made rovers have successfully landed on Mars; all Russian attempts have ended in failure.

The Chinese Lunar Sample Return mission is show in simulation in the China View video. This mission would pave the way for a Chinese Mars sample return by 2030. (Photo Credit: China View)
The Chinese Lunar Sample Return mission is show in simulation in the China View video. This mission would pave the way for a Chinese Mars sample return by 2030. (Photo Credit: China View)

The presentation also stated future plans for a sample-return mission by 2030. If the first Chineses Mars rover lands successfully in 2020, it will join up to four active rovers on the surface. Curiosity, ExoMars (ESA/NASA), Mars Rover 2020 and MER Opportunity. Six years seems like a long time but MER’s Oppy is a proven trooper having lasted over ten years. Curiosity, barring the unexpected, might last beyond 2020. ExoMars and NASA’s 2020 rover are still in development phases. Using ExoMars or 2020, NASA has plans to recover collected samples from rovers and return them to Earth in the 2020s and possibly as soon as 2022.

References:

China unveils first Mars rover and exploration system for red planet
China Daily

Posted on by Matt Williams

Weather Forecasting on Mars Likely to be Trickier Than on Earth

Clouds above the rim of "Endurance Crater" in this image from NASA's Mars Exploration Rover Opportunity. These clouds occur in a region of strong vertical shear. The cloud particles (ice in this martian case) fall out, and get dragged along away from the location where they originally condensed, forming characteristic streamers. Opportunity took this picture with its navigation camera during the rover's 269th martian day (Oct. 26, 2004). Image Credit: NASA/JPL

Predicting the weather here on Earth is never an easy thing, but predicting it on Mars may be ever trickier. Such is the argument presented by a recent study concerning “macroweather” patterns on the Red Planet, a new regime for understanding how planetary environments work.

When it comes to describing the climate of a planet, two important concepts come into play. First, there’s weather, which covers day-to-day changes due to fluctuations in the atmosphere. Second, there’s climate, which is more stable and subject to change over the course of decades. Macroweather, the latest addition to the game, describes the relatively stable periods that exist between short-term weather and long-term climate.

For those of us dwelling here on planet Earth, these are familiar concepts. But researchers say this same three-part pattern applies to atmospheric conditions on Mars. The results of a new paper, published today in Geophysical Research Letters also show that the Sun plays a major role in determining macroweather.

Several dust devils cross a plain in this animation of a series of images acquired by NASA's Mars Rover Spirit in May, 2005. (NASA/JPL-Caltech/Cornell/USGS)
Several dust devils cross a plain in this animation of a series of images acquired by NASA’s Mars Rover Spirit in May, 2005. (NASA/JPL-Caltech/Cornell/USGS)

The scientists chose to study Mars because of the wealth of data it has provided in recent decades, which they then used to test their theory that a transitional “macroweather” regime exists on a planet other than Earth. They used information collected from the Viking Mars lander mission from the 1970s and 1980s, and more recent data from the Mars Global Surveyor.

By taking into account how the sun heats Mars, as well as the thickness of the planet’s atmosphere, the scientists predicted that temperatures and wind would fluctuate on Mars similar to how they fluctuate on Earth. However, this transition from weather to macroweather would take place over 1.8 Martian days (about two Earth days), compared with a week to 10 days here on Earth.

“Our analysis of the data from Mars confirmed this prediction quite accurately,” said Shaun Lovejoy, a physics professor at McGill University in Montreal, Canada, and lead author of the paper. “This adds to evidence, from studies of Earth’s atmosphere and oceans, that the sun plays a central role in shaping the transition from short-term weather fluctuations to macroweather.”

Early Spring Dust Storms at the North Pole of Mars. Early spring typically brings dust storms to northern polar Mars. As the north polar cap begins to thaw, the temperature difference between the cold frost region and recently thawed surface results in swirling winds. The choppy dust clouds of several dust storms are visible in this mosaic of images taken by the Mars Global Surveyor spacecraft in 2002. The white polar cap is frozen carbon dioxide. (NASA/JPL/Malin Space Science Systems)
Early Spring Dust Storms at the North Pole of Mars, taken by the Mars Global Surveyor spacecraft in 2002. Image Credit: NASA/JPL/Malin Space Science Systems

The findings also indicate that weather on Mars can be predicted with some skill only two days in advance, compared to 10 days on Earth.

“We’re going to have a very hard time predicting the weather on Mars beyond two days given what we have found in weather records there,” said co-author Jan-Peter Muller from the University College London Mullard Space Science Laboratory in the UK, “which could prove tricky for the European lander and rover.”

This research promises to advance scientists’ understanding of the dynamics of Earth’s own atmosphere, and could potentially provide insights into the weather of Venus, Saturn’s moon Titan, and possibly the gas giants Jupiter, Saturn, Uranus, and Neptune.

As always, in learning about other planets and their climates, scientists are finding that the planets of our Solar System may have more in common with Earth than previously thought. Because of this, studying these other worlds will inevitably help us to better understand our own.

Further Reading: AGU, McGill

Posted on by Bob King

Mind-blowing Meteor Shower on Mars During Comet Flyby, Say NASA Scientists

We can only imagine what the meteor storm from Comet Siding Spring must have looked like standing on the surface of Mars on October 19, 2014. NASA scientists announced today that the planet experienced an exceptional shower during the comet's flyby, saturating the sky. Source: Stellarium

“Thousands of meteors per hour would have been visible — truly astounding to the human eye.” That’s Nick Schneider’s description of what you and I would have seen standing on Mars during Comet Siding Spring’s close flyby last month. “It would have been really mind-blowing,” he added. Schneider is instrument lead for MAVEN’s Imaging Ultraviolet Spectrograph (IUVS).

He and a group of scientists who work as lead investigators for instruments on the MAVEN and  Mars Reconnaissance Orbiter (MRO) spacecraft shared the latest results from the comet flyby during a media teleconference earlier today. There were many surprises. Would we expect anything less from a comet?

Here’s a summary of the results:

A very dusty ice ball – The comet’s dust tail and the amount of dust in its coma were much larger than expected, prompting Jim Green, director of NASA’s Planetary Science Division in Washington,  to remark: “It makes me very happy we hid them (the spacecraft) on the backside of Mars. That really saved them.” Siding Spring dumped several tons of fine dust into the Martian atmosphere prompting a spectacular meteor shower and possibly causing a yellow, twilight afterglow above the Curiosity landing site from vaporizing sodium atoms contained in the minerals. That, and dust in the mid-levels of the atmosphere at the time contributed to the rover’s difficulty in getting good photos of the comet itself. Scientists are still examining the images.

MAVEN's Ultraviolet Imaging Spectrograph (IUVS) uses limb scans to map the chemical makeup and vertical structure across Mars' upper atmosphere. It detected strong enhancements of magnesium and iron from ablating incandescing dust from Comet Siding Spring. Credit: NASA
MAVEN’s Ultraviolet Imaging Spectrograph (IUVS) uses limb scans to map the chemical makeup and vertical structure across Mars’ upper atmosphere. It detected strong enhancements of magnesium and iron from ablating incandescing dust from Comet Siding Spring. Credit: NASA
I'm not big into graphs either, but check out the heavy metal drama in this. On the left is the "before" scan from MAVEN's IUVS instrument; on the right, during the comet's close approach. The spike in magnesium from vaporizing comet dust is impressive. Ionized magnesium is the strongest spike with neutral and ionized iron on the left in smaller amounts. Both elements are common in meteorites as well as on Earth. Credit: NASA
I’m not big into graphs either, but check out the heavy metal drama going on here. On the left is the “before” scan from MAVEN’s IUVS instrument; on the right, during the comet’s close approach. The spike in magnesium from vaporizing comet dust is impressive. Ionized magnesium is the strongest spike with neutral and ionized iron on the left in smaller amounts. Both elements are common in meteorites as well as on Earth. Credit: NASA
Profiles showing spikes in the amounts of eight different metals detected in Mars' atmosphere during the flyby by MAVEN's Neutral Gas and Ion Mass Spectrometer (NGIMS). The emissions faded with a short time. Credit: NASA
Profiles showing spikes in the amounts of eight different metals over time detected in Mars’ atmosphere by MAVEN’s Neutral Gas and Ion Mass Spectrometer (NGIMS). The emissions faded within a short time, but chemicals from the comet will continue to interact with the Martian atmosphere over time. Credit: NASA

Chemistry of Mars’ atmosphere changed – Dust vaporized in the intense meteor shower produced a striking increase in the amount of magnesium, iron and others metals in Mars’ upper atmosphere. “We were pressed back in our chairs,” said Mike Schneider. The bombardment created a temporary new layer of comet-tainted air and may have acted as condensation nuclei for the formation of high-altitude clouds. MAVEN’s Neutral Gas and Ion Mass Spectrometer (NGIMS) recorded huge spikes in the levels of eight different metals during the comet’s passage and then trailed off a day or so later. “They came to MAVEN as a free sample from no less than an Oort Cloud comet,” said Mehdi Benna, instrument scientist for MAVEN’s Neutral Gas and Ion Mass Spectrometer.

The MARSIS instrument on the Mars Express is a ground penetrating radar sounder used to look for subsurface water and ice. It can also make soundings of the ionosphere. It was used to see the new ionospheric layer formed by vaporizing comet dust on October 19th. Credit: ESA
The MARSIS instrument on the Mars Express is a ground penetrating radar sounder used to look for subsurface water and ice. It can also make soundings of the ionosphere. It was used to see the new ionospheric layer formed by vaporizing comet dust on October 19th. Credit: ESA
The Mars Express radar probed the ionosphere (upper atmosphere) at three different times. At top, before the comet arrived; middle, 7 hours later after the comet's closest approach and bottom, hours later after the comet had departed. The middle graph shows a strong signal (blue horizontal bar) from the creation of newly-ionized layer of the planet's lower atmosphere from hot, fast-moving comet dust. Credit: ESA
The Mars Express radar probed the ionosphere (upper atmosphere) at three different times. At top, before the comet arrived; middle, 7 hours later after the comet’s closest approach and bottom, hours later after the comet had departed. The middle graph shows a strong signal (blue horizontal bar) from the creation of a newly-ionized layer of the planet’s lower atmosphere from hot, fast-moving comet dust. Credit: ESA

 

Flaming comet dust creates new ionospheric layer – Comet dust slamming into the atmosphere at 125,000 mph (56 km/sec) knocked electrons loose from atoms in the thin Martian air  50-60 miles (80-100 km) high, ionizing them and creating a very dense ionization layer in the planet’s lower ionosphere seven hours after the comet’s closest approach. Normally, Mars ionosphere is only seen on the dayside of the planet, but even when the MARSIS instrument on Mars Express  beamed radio waves through the atmosphere on the nightside of the planet, it picked up a very strong signal.

54 red-filtered images of the comet's nucleus-coma taken by the MRO's HiRISE camera show changes in the flow of material leaving the comet. Credit: NASA
54 red-filtered, false-color images of the comet’s nucleus-coma taken by the MRO’s HiRISE camera show changes in the flow of material leaving the comet. Based on the photos, the comet’s nucleus spins once every 8 hours. Credit: NASA
The five closest photos made with the HiRISE camera show the combined light of the nucleus and coma. Scale is 140-meter per pixel at top and 177-meters at bottom. Scientists will further process these images to separate the nucleus from the coma. Credit: NASA
The five closest photos made with the HiRISE camera show the combined light of the nucleus and coma. Scale is 140-meter per pixel at top and 177-meters at bottom. Scientists will further process these images to separate the nucleus from the coma. Credit: NASA

Nucleus spins once during your work day – Comet Siding Spring’s icy core spins once every 8 hours and its irregular shape causes strong variations in the comet’s brightness. The comet’s size appears less certain  – at least for the moment – with estimates anywhere between a few hundred meters to 2 km (1.2 miles). More analysis on images taken by MRO’s HiRISE camera should narrow that number soon.

CRISM photo and spectrum of Comet Siding Spring. The spectrum is "flat", indicating we're seeing sunlight reflected off comet dust. The intriguing color variations in the image tell of dust particles of varying size leaving the nucleus. Credit: NASA
CRISM photo and spectrum of Comet Siding Spring. The spectrum is “flat”, indicating we’re seeing ordinary sunlight reflecting off comet dust. The intriguing color variations in the image tell us the comet’s spewing dust particles of many sizes. Credit: NASA

Dust motes of many sizes – Color variations across Siding Spring’s coma seen by Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) indicate it’s releasing dust particles of different sizes – big and little.

The scientists involved in the encounter couldn’t be happier with how the instruments functioned and the amount of hard data returned. Said Jim Green: “We are so lucky to observe this once-in-a-lifetime event.” How true when you consider that it takes about 8 million years for a comet from the Oort Cloud, that vast reservoir of frozen comets  extending nearly a light year from the Sun, to get here in the first place.  Nick Schneider put it another way:

“Not only is this a free sample of the Oort Cloud in Mars’ atmosphere, but it gives us a chance to learn more about Mars itself.”

If you’d like to listen in to the hour-long teleconference at any time, it’ll be up for the next week or so HERE.

Posted on by Matt Williams

Canadian Micro-Rover and Lander “Northern Light” Aim for Launch to Mars in 2018

Artist's concept of the Norther Light Lander on the Martian surface. Credit: Mars Rocks

The first Canadian mission to Mars could be blasting off towards the Red Planet in just three years time. At least, that is what Thoth Technology, a Canadian aerospace company from Pembroke, Ontario, hopes to accomplish. And two days ago, they launched an Indiegogo campaign to raise the 1.1 million dollars needed to pay for all the hardware needed to make the mission happen.

If it is successful, it would be first Canadian mission to the surface of Mars.

The project for this Canadian mission would involve sending the Northern Light lander and Beaver rover in space and land them on Mars. Once there, the Beaver rover will be deployed and begin conducting surveys of the Martian surface, alongside the many other robotic rovers and orbiters studying the Martian landscape.

“I think it’s important to do big things,” said Ben Quine, principal investigator for the mission. “Mars is the only other habitable planet in the solar system, and if we want to survive, we need to be a multi-planet species.”

Quine is the technical director and chair of the board at Thoth Technology and a professor of space engineering at York University, which is a partner on the project, houses a lot of the space testing facilities, and will analyze the data from the mission.

Northern Light Lander and Robotic Arm (concept art). Credit: Mars Rocks/Indiegogo
Northern Light Lander and Robotic Arm (concept art). Credit: Mars Rocks/Indiegogo

The main goal of the mission is to expand upon the efforts being made by NASA’s Curiosity, Spirit, and Opportunity rovers, which have only explored a half dozen sites on Mars. By exploring more areas, they hope to find other signs of life on the harsh landscape, and using knowledge gleaned from studies in the Canadian Arctic no less.

According to Quine, in Antarctica and the Canadian Arctic, photosynthetic microbes can be found in a layer a millimeter or two below the surface of the rock. Here, they are protected from the harshest of the sun’s UV rays, but can still use sunlight to produce energy.

Northern Light will look for similar life on Mars by using the lander’s robotic arm to grind away the surface of rocks. It will then use a device called a photometer to scan for different shades of green that may indicate the presence of photosynthetic organisms. Quine and his colleagues also hope to determine what future technologies will be required to sustain a future human presence.

“If we are serious about living on Mars,” he said, “we need to explore it much more thoroughly. We probably need hundreds of landers to pepper the surface prior to sending people so we know exactly what it is that we’re up against, where we’d find things like minerals and where we’d want to live.”

Intrinsic to the company’s plan is the widespread exploration of Mars using low cost, off-the-shelf technology. For example, the Northern Light lander probe has a mass under 50 kg (including payload) and is made of an advanced composite material that includes thermal shielding and shock absorption. The probe includes solar arrays to generate power for the instrumentation and lander avionics.

The Beaver Rover prototype. Credit: Thoth Technologies/Indiegogo
The Beaver Rover prototype. Credit: Thoth Technologies/Indiegogo

As for the Beaver rover, its small size and low-cost mask the fact that it is like no other rover that has ever gone to Mars. For one thing, it weighs just six kilograms (13 pounds). In comparison, NASA’s Curiosity rover weighs in at a hefty 900 kilograms (1980 pounds, close to an imperial ton), forcing it to rely largely on nuclear power to lug its bulk around.

The NASA rovers, which are controlled from Earth, also move very slowly and cover only a few dozen meters per day because their commands take 15 minutes to reach Mars from Earth. By contrast, the Beaver rover is designed to be quicker, in part by being more independent.

“We’re going to embed intelligence into the rover,” Quine said, “and the rover is going to be tasked to drive around and explore the environment using autonomous algorithms built into the rover to determine things like when it should make a maneuver to avoid falling into a hole or run into a rock.”

Quine said he has already spent 12 years working on the project and his team has spent half a million dollars developing and testing prototypes of the lander and micro-rover. They’ve also performed space tests on some of the instruments by flying them on satellites in low-Earth orbit.

Northern Light Ground Station at the Algonquin Radio Observatory. Credit: Mars Rocks/Indiegogo
Northern Light Ground Station at the Algonquin Radio Observatory. Credit: Mars Rocks/Indiegogo

Thoth Technologies also recently spent $1 million leasing and repairing the Algonquin Radio Observatory from the federal government, which they plan to use as a ground station to communicate with the lander and rover when they are on Mars.

As for the tricky task of getting to Mars, Quine and his colleagues hope to barter their way aboard one of the many missions heading to Mars in 2018. These include the joint Russian-European Space Agency ExoMars rover mission and an Indian Space Research Organization mission that will likely include a lander and rover.

In exchange for hitching a ride on one of these rockets, they will collect and relay other agencies’ data from Mars via the ARO ground station, which can collect them at times of day when places like Russia and India are facing away from Mars.

Those who are interested in supporting their campaign are being incentivized with a chance to help choose the landing site for the mission, and will get rewards ranging from a Frisbee for $20 or the chance to name the lander for $1 million.

The company has also launched a social campaign – featuring Ed Robertson of the “Barenaked Ladies” – urging people to create and upload their own “Mars dance” video to marsrocks.ca.

To find out more, check out their promotional video or click on the link below:

Further Reading: Mars Rocks

Posted on by Bob King

Curiosity Rover Sees a Pixel’s-Worth of Comet Siding Spring

In this panoramic view taken by NASA's Curiosity Rover on October 19th shortly after local sunset (6:11 p.m.), Comet Siding Spring is the single bright pixel at far upper left. Click for a high resolution version. Credit: NASA/JPL-Caltech/Malin Space Science Systems/James Sorenson

When Comet Siding Spring skimmed just 84,500 miles from Mars last month, NASA’s Opportunity and Curiosity Rovers – along with several orbiting Mars spacecraft – readied their cameras to record the historic flyby. Opportunity’s photos revealed a small, fuzzy blob against the stars of Cetus the Whale, but most of us searched in vain to find any trace of the comet among the blizzard of noise in pictures snapped by Curiosity. Yet it may be there after all. 

In this before and after animation, you can see how much noise needed to be cleaned from one of the original photos to uncover the the comet. Credit: NASA/JPL-Caltech/Malin Space Science Systems/James Sorenson
In this before-and-after animation, you can see how much noise needed to be cleaned from the original photos to uncover the the comet. Credit:  NASA/JPL-Caltech/Malin Space Science Systems/James Sorenson

In this panoramic image at top, assembled and processed by James Sorenson to remove the pervasive noise in the original photos, we see with a twilit landscape just after sundown. Look closely in the upper left hand corner and you’ll see a speck of light. That’s it! Combined with positional information, Sorenson tentatively identified that pixel as Comet C/2013 A1 Siding Spring. OK, it’s not much to look at but may be our best candidate for the hoped-for photo from Curiosity.

Comet Siding Spring near Mars in a composite image by the Hubble Space Telescope, capturing their positions between Oct. 18 8:06 a.m. EDT (12:06 p.m. UTC) and Oct. 19 11:17 p.m. EDT (Oct. 20, 3:17 a.m. UTC). Credit: NASA, ESA, PSI, JHU/APL, STScI/AURA
Comet Siding Spring near Mars in a composite image by the Hubble Space Telescope, capturing their positions between Oct. 18 8:06 a.m. EDT (12:06 p.m. UTC) and Oct. 19 11:17 p.m. EDT (Oct. 20, 3:17 a.m. UTC). Credit: NASA, ESA, PSI, JHU/APL, STScI/AURA

Remember that conditions were far from ideal when the picture was taken. There was considerable dust and haze in the Martian atmosphere over Gale Crater. Dust effectively absorbs and also scatters light. The bright twilight sky only made the comet more difficult to discern. If you’ve ever struggled to see Mercury at dusk on a hazy summer evening, you’ll understand what our robot was up against.

This animation combines multiple images that were acquired by the HRSC camera on board Mars Express during the comet Siding Spring flyby on October 19, 2014. Click to animate Credit: ESA/DLR/FU Berlin
This single image is one of series that were acquired by the HRSC camera on board Mars Express during the comet Siding Spring flyby on October 19, 2014. Click to animate. Credit: ESA/DLR/FU Berlin

The European Space Agency’s Mars Express orbiter also chimed in with a recent set of comet images. As it flew by, Siding Spring was traveling at around 35 miles per second (56 km/sec) relative to Mars. Images were acquired at 17-second intervals at a resolution of 10.5 miles (17 km) per pixel. What do they show? The irregular shape might make you might think you’re seeing the actual shape of the comet’s nucleus. Unfortunately, that’s impossible because it’s less than a kilometer across and each pixel in the photo spans 17 km.  Instead, we’re seeing the combined light of the nucleus and extended coma, the surrounding cloud of gas and dust. Why the images are pure black and white with no grey tones is unclear.

Two photos of comet C/2013 A1 Siding Spring taken 37 minutes apart by the CRISM imager. The subtle coloration of the comet indicates the abundance of different molecules. Credit: NASA / JPL / JHUAPL
Two photos of comet C/2013 A1 Siding Spring taken 37 minutes apart by the CRISM imager when the comet was closest to Mars. The subtle colors seen are likely related to dust grain size or composition. The nucleus itself is not resolved. Credit: NASA/JPL/JHUAPL

Besides the the close-up photo taken with the HiRISE camera on NASA’s Mars Reconnaissance Orbiter, its Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) got busy photographing the dusty inner coma generated when sunlight warms and vaporizes dust-laden ice in the nucleus. The  scale of the left image is approximately 2.5 miles (4 km) per pixel; for the right image, it is about 3 miles (5 km) per pixel.

According to NASA, CRISM observed 107 different wavelengths of light in each pixel. Here, only three colors are shown. Researchers think the appearance of color variations in the inner coma could be due to the properties of the comet’s dust, possibly dust grain size or composition. More photos and results from all the spacecraft will appear in the weeks and months ahead as scientists continue their analyses.

Comet Siding Spring shows a condensed coma and a short, faint tail in this photo taken on November 5, 2014. Credit: Alfons Diepvens
Comet Siding Spring shows a condensed coma and hint of a tail in this photo taken on November 5, 2014. Credit: Alfons Diepvens

Comet Siding Spring has left Mars and its crew of robotic eyes behind as it crawls north into the constellation Serpens low in the southwest at dusk. Amateur astronomers are still keen to photograph it at every opportunity. Recent observations indicate a temporary re-brightening, though the comet remains a dim 11th magnitude object.

Posted on by Matt Williams

Welcome to Mars! – Hi-SEAS and Mars Society Kick Off New Season of Missions

Credit: Hi-SEAS

The Hawaii Space Exploration Analog and Simulation (aka. Hi-SEAS) – a human spaceflight analog for Mars located on the slopes of the Mauna Loa volcano in Hawaii – just kicked off its third research mission designed to simulate manned missions on Mars.

Located at an elevation of 2500 meters (8,200 feet) above sea level, the analog site is located in a dry, rocky environment that is very cold and subject to very little precipitation. While there, the crew of Mission Three will conduct detailed research studies to determine what is required to sustain a space flight crew during an extended mission to Mars and while living on Mars.

The six-member team includes Martha Lenio (Commander), Allen Mirkadyrov, Sophie Milam, Neil Sheibelhut, Jocelyn Dunn, and Zak Wilson, with Ed Fix and Micheal Castro in Reserve. This crew will spend the next 254 days living in conditions that closely resemble those present on the Martian surface.

Research into food, crew dynamics, behaviors, roles and performance, and other aspects of space flight and a mission on Mars itself is the primary focus. This will be the third of four research missions conducted by Hi-SEAS and funded by the NASA Human Research Program. The information gleaned from these research studies, it is hoped, will one day help NASA conduct its own manned missions to the Red Planet.

Artist conception of a Hi-SEAS habitation dome. Credit: Blue Planet Research/Bryan Christie Design
Artist conception of a Hi-SEAS habitation dome. Credit: Blue Planet Research/Bryan Christie Design

For the course of their research studies, the crew will be living in a dome that is 11 meters (36 feet) in diameter and has a living area of about 93 square meters (1000 square feet). The dome also has a second level that is loftlike – providing a high-ceiling is crucial to combating long-term feelings of claustrophobia.

The six crew members will sleep in pie-slice-shaped staterooms, each of which contains a mattress, desk and stool. Their clothing is stored under the bed, which sits at the wide side of the slice. They do their business in a series of composting toilets that turn their repurposed feces (the pathogens are removed) into a potential source of fertilizer for the next mission.

A workout area provides the astronauts with an opportunity to stay in shape with such exercises as video aerobics, juggling, and balloon volleyball.  And communications are conducted through NASA-issued email addresses – with an artificial delay to simulate the time lag from Mars – and access to a web made of cached, nondynamic pages.

To complete the illusion of being on Mars, when the crew are not in their pressurized habitation dome, they will be walking around in space suits. The mission will conclude on July 14th, 2015, with a fourth and final mission to take place at a so-far undetermined date.

Image Credit: Mars Society MRDS
The Mars Society’s Mars Desert Research Station in southern Utah.
Credit: Mars Society MRDS

In related news, the Mars Society announced yesterday that Crew 142 arrived at the Mars Desert Research Station (MDRS) in southern Utah to begin the 2014-15 MDRS field season. Crew 142, consisting of seven people, is the first of three crews composed of finalists for the planned Mars Arctic 365 (MA365) mission that will serve at MDRS for two weeks of training and testing.

Once their training is complete, crew 142 will be shipping off to the Flashline Mars Arctic Research Station (FMARS) located on Devon Island in northern Canada, followed shortly behind by the other MA365 finalists, for a year-long research stint.

Much like the Hi-SEAS project, the Mars Society is a non-profit space advocacy organization that is dedicated to promoting the human exploration and settlement of Mars. Established by Dr. Robert Zubrin and colleagues in 1998, the organization works to educate the public, the media, and government on the benefits of Mars exploration and the importance of planning a manned mission in the coming decade.

For the next two weeks, the seven finalists will be engaged in activities designed to simulate conditions on another planet. For the duration, they will be living and working in the Mars Analog Research Stations (MARS) – a prototype of the habitat that the Mars Society plans to eventually land on Mars and serves as the crew’s main base as they explore the harsh Martian environment.

FMARS hab with Mars flag in foreground. Credit: Mars Society
FMARS hab with Mars flag in foreground. Credit: Mars Society

Ultimately, these analog experiments offer NASA and other space research groups the opportunity to carry out field research in a variety of key scientific and engineering disciplines that will help prepare humans to explore Mars in the coming years.

For one, it lets research crews know what kinds of work they can physically do when fully suited up, and just how well their suits can hold up to months’ worth of activity. At the same time, it allows for psychological studies and human factor issues – like testing the effects of isolation on human beings, and whether or not the habitats will suffice for long periods of occupation.

Above all, it lets us see how human beings with different skills sets and tasks can function together as a whole in a Martian environment. On any given day, astronauts in these analog environments are tasked with working within the pressurized habitats, out in the field, or far away using pressurized rovers or un-pressurized vehicles.

At the same time, it offers the opportunity for research crews to test out being in an isolated environment, connected to mission control and the terrestrial scientific community only through official communications.

And of course, there’s also the matter of the astronauts’ being connected to each other and robots in the field. Making these different assets work together to achieve the maximum possible exploration effect requires developing a combined operations approach, which is another aim of Hi-SEAS, the Mars Society, and other research groups.

Further Reading: Hi-SEAS, Mars Society