Tag: engineering

A bullseye on Mars

12:30 pm

Bullseye crater on Mars
Click for full image.

Cool image time! The photo on the right, cropped and reduced to post here, was taken by the high resolution camera of Mars Reconnaissance Orbiter (MRO) on November 30, 2019. It shows a lone crater on the flat northern lowlands of Mars in a region dubbed Arcadia Planitia.

The crater is intriguing because of its concentric ridges and central pit. As this region is known to have a great deal of subsurface water ice, close to the surface, these features were probably caused at impact. My guess is that the ice quickly melted, formed the kind circular ripples you see when you toss a pebble in a pond, but then quickly refroze again, in place.

This location is also of interest in that is it just north of the region that SpaceX considers the prime candidate landing site for its Starship manned spaceship.

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Successful first light for CHEOPS space telescope

12:02 pm

The science team for Europe’s exoplanet-hunting CHEOPS space telescope announced today that the telescope has successfully obtained its first pictures, and that all appears to be working correctly.

Preliminary analysis has shown that the images from CHEOPS are even better than expected. However, better for CHEOPS does not mean sharper as the telescope has been deliberately defocused. This is because spreading the light over many pixels ensures that the spacecraft’s jitter and the pixel-to-pixel variations are smoothed out, allowing for better photometric precision. “The good news is that the actual blurred images received are smoother and more symmetrical than what we expected from measurements performed in the laboratory,” says Benz. High precision is necessary for CHEOPS to observe small changes in the brightness of stars outside our solar system caused by the transit of an exoplanet in front of the star. Since these changes in brightness are proportional to the surface of the transit planet, CHEOPS will be able to measure the size of the planets. “These initial promising analyses are a great relief and also a boost for the team,” continues Benz.

I suspect the planned fuzziness of their images is why the press release did not include them.

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A Chernobyl fungus that thrives on radiation

11:51 am

Scientists have found that a Chernobyl fungus that eats radiation, turning it into food, is so successful that they have sent samples to ISS to see how it responses to space radiation.

By growing it in the International Space Station, where the radiation level is hiked compared to that on Earth, Venkateswaran and Professor Clay Wang of the University of Southern California were able to monitor mutation. When microorganisms are put under more stressful environments, they release different molecules, which could further out understanding of the fungi and how it can be used to develop radiation-blocking drugs for humans.

It is also possible that the fungus could be adapted for other uses.

Kasthuri Venkateswaran, a research scientist at NASA who is leading the experiments on the Cryptococcus neoformans fungi, believes that by extracting its radiation-absorbing power and manufacturing it in drug form, it could be used as a ‘sun block’ against toxic rays.

It would allow cancer patients undergoing radiation therapy, nuclear power plant engineers and airline pilots to operate without fear of absorbing a deadly dose of rays, Venkateswaran envisaged to Scientific American magazine.

The fungi’s radiation-converting power could also be used to power electrical appliances, with it being touted as a possible biological answer to solar panels.

It appears that the fungi’s high level of melanin contributes to its ability to do this.

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NASA delays commercial bidding process for its unmanned lunar landers

10:30 am

Capitalsm in space: NASA has postponed the bidding process for both the commercially-built lander that will bring its its VIPER lunar rover as well as the smaller landers that will bring simpler science packages to the Moon.

In the first case, it appears that the commercial companies wanted more time because VIPER is a heavier and bigger payload than their landers are currently designed for. In the second case, the reasons for the postponement are less clear, leaving the companies involved somewhat puzzled and in the dark.

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SpaceX might spin off Starlink with stock offering

10:15 am

Capitalism in space: Comments by SpaceX’s CEO suggest the company is considering spinning off its Starlink internet operation, with the additional possibility that spin-off would go public.

SpaceX President & COO Gwynne Shotwell told a group of investors that the company may spin off its Starlink internet satellite business, possibly as a public company. “Starlink is the right kind of business that we can go ahead and take public,” Shotwell said, according to a report from Bloomberg.

…There’s no time frame yet disclosed for a potential IPO of the Starlink side of SpaceX, and the company did not immediately respond to a request for comment. It’s unlikely the whole company would go public. Elon Musk has said for years that he wouldn’t take SpaceX public until the company has been regularly launching to Mars.

Don’t start counting your chickens. While there might be good reasons for SpaceX to do this, I suspect there are other good reasons for not doing it. They will likely make the decision once the Starlink constellation is operational and they have begun providing service to customers. At that point they will see what the demand will bring, and will have a better idea what’s the best course to take.

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NASA safety panel raises more questions about Boeing and Starliner

10:05 am

In its quarterly meeting yesterday, NASA’s safety panel raised more questions about the software problems during the unmanned demo mission of Boeing’s Starliner manned capsule in December.

NASA’s Aerospace Safety Advisory Panel (ASAP) revealed today that a second software error was discovered during the uncrewed Boeing Starliner flight test in December. Had it gone undetected during the flight, it had the potential to cause “catastrophic spacecraft failure” during reentry. The panel wants a complete review of Boeing’s software verification processes before NASA decides whether a second uncrewed flight test is needed. In an email this evening, Boeing said it appreciates the input and is working on a plan with NASA to address all the issues and decide what comes next.

In that Boeing email it noted that it was “unclear” what the consequences would have been if this second software issue had not been fixed.

The safety panel also called for an overall organizational review of the entire Boeing company, similar to the review done to SpaceX after Elon Musk was videoed taking a toke on a joint during a podcast interview.

The decision on whether Boeing will be required to fly another unmanned demo mission is targeted for before the end of February.

One comment: While there is clear evidence here that Boeing had issues on that demo flight that must be resolved before humans fly on Starliner, we must also recognize that NASA’s safety panel has an unfortunate tendency to overstate risk, demanding margins of safety that are frequently unrealistic for an endeavor pushing the envelope of exploration. That panel has also exhibited an almost corrupt bias against private commercial space, while looking past much more serious safety issues in the NASA-built SLS and Orion programs.

At the same time, the larger corporate issues here with Boeing do appear far more systemic and concerning that those that occurred with SpaceX. A cold independent audit of the company by NASA could actually do Boeing a lot of good.

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Russian Soyuz launches 34 OneWeb satellites

4:04 pm

Capitalism in space: Russia’s Soyuz rocket, launching from Russia, today successfully placed 34 OneWeb satellites into orbit.

This is the first of 20 launches over the next two years to build OneWeb’s satellite constellation. A previous Soyuz launch put up six demonstration satellites.

This was also Russia’s first launch in 2020. The leaders in the 2020 launch race:

3 China
2 SpaceX
1 Arianespace (Europe)
1 Rocket Lab
1 Russia

China leads the U.S. 3 to 2 in the national rankings.

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First Virgin Orbit launch pending?

11:09 am

Capitalism in space: According to their CEO, the first launch of Virgin Orbit’s LauncherOne rocket is expected to occur in the “coming weeks.”

“We are positioned at the end of the runway in Mojave. Our rocket is married to our 747,” he said. “We’re going through launch rehearsals.”

In an interview after the panel, Hart said that the company was ready to move into operations quickly should that test launch be a success. “If we have a great day, we’re poised to go forward pretty much immediately,” he said. The next LauncherOne rocket is currently “well along” in assembly at the company’s Long Beach, California, factory.

He also admitted that as a demo test flight, that first launch could go sour, and they were prepared for that.

The development of LauncherOne slowed appreciably in the past two years. In July 2018 got their first launch license, and said they would do this launch late that year. It did not happen. Then, in November 2018 they began capture-carry flights, with the expectation they would fly this first launch in 2019. This did not happen either. Worse, in August 2019 it was revealed that the company had lost a major launch contract, the lose of which might explain the slowdown in development.

Despite this slow down, my 2016 prediction that LauncherOne will complete its first commercial flight before Virgin Galactic’s SpaceShipTwo, still looks good, even though SpaceShipTwo began development more than a decade before LauncherOne.

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New solar results from Parker

10:24 am

Scientists have released a new set of science results from the Parker Solar Probe, all part of a special issue of the Astrophysical Journal.

From the introduction to the journal issue:

Over the past year and a half, PSP returned an enormous amount of science data that drew a new picture of the source region of the solar wind. The first discoveries of the mission were reported in the Nature magazine on 2019 December 4. This special issue of the Astrophysical Journal Supplement series consists of over 50 science papers that provide more detailed analyses of the data from the first two orbits.

Most of the results are very technical, relating to detailed phenomenon of the near solar environment, and are in a sense very preliminary. They are essentially still gathering data. It appears too soon for them to come to any solid conclusions yet.

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ISS crew returns to Earth

9:59 am

Three crew members from ISS returned to Earth today in a Soyuz capsule, including American Christina Koch, who set a new longevity record of 328 for a woman.

Christina Koch launched to the International Space Station aboard the Soyuz MS-12 launch vehicle on 14 March 2019 from the Baikonur Cosmodrome in Kazakhstan. At the time of launch, she was scheduled to perform a six-month mission, returning to Earth on the Soyuz MS-12 vehicle in early October 2019.

However, a variety of factors aligned to place NASA in the position of allowing one of its astronauts to remain aboard the International Space Station for close to one year. Christina was the logical choice given her background and EVA/spacewalk training. The decision, announced just one month after she began living and working aboard the Station for a few months, meant Christina would become the world-wide record holder for longest continuous time in space by a woman.

In fact, with a landing Thursday, Christina will have been in space 328 days, just 12 days shy of fellow NASA astronaut Scott Kelly’s record for single-longest continuous time in space by a NASA astronaut at 340 days.

The overall longevity record still belongs to Russian Valeri Polyakov, at 438 days in 1994-1995.

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The cliff at the end of Chasma Boreale on Mars

2:11 pm

The cliff at the end of Chasma Boreale
Click for full image.

Cool image time! The image to the right, cropped to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on November 15, 2019 during the height of the Martian summer in the northern hemisphere. It shows the scarp of the polar ice cap, looking directly down that scarp at what the MRO image post dubs an “exposure of basal unit”, or the bottom of the cap itself. This suggests that the base of that cliff is no longer ice, but the bedrock below it. If this cliff is similar to other scarps off the polar ice cap it should be at least 1,600 feet tall. It might be more, however, as the elevation difference between the cap and the floor of this basin is estimated by scientists to be more than a mile total.

This scarp however is different than the outer icecap scarps where avalanches occur with great frequency during the spring and summer. Instead, it is located in the heart of the ice cap, at the very end of the gigantic canyon Chasma Boreale that slashes a deep cut into that ice cap, practically cutting it in half.

Overview

The overview map on the right, with the red dot showing where this image is located, illustrates the cutting nature of Chasma Boreale. The canyon itself is 350 miles long with a width of about 75 miles at its beginning and with walls that at some points rising a mile in height.

Scientists theorize this canyon was formed by melting ice from cap that built up at the cap’s base, causing erosion and collapse, with the flow following the grade down hill from this end point out to the lowland plains beyond. It is also possible winds played a part in this process, encouraging the canyon formation.

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Europa Clipper faces budget overruns

10:25 am

NASA’s $4.25 billion dollar mission to orbit the Jupiter moon Europa now faces cost overruns that threaten its launch in 2023.

The management of NASA’s Europa Clipper mission, facing dwindling cost reserves while still years away from launch, is looking at cost saving options that would preserve the mission’s science.

In a Feb. 3 presentation at a meeting of the Outer Planets Assessment Group in Houston, Jan Chodas, project manager for Europa Clipper at the Jet Propulsion Laboratory, said she was looking for ways to restore cost reserves that had declined precipitously in the last year.

Chodas said that Europa Clipper had met a JPL recommendation of 25% cost reserves, known at the lab as unallocated future expenses (UFE), when it completed a final “delta” preliminary design review in June 2019. By November, though, those reserves had fallen to just 12%, a level deemed “unacceptably low” for a mission not scheduled for launch until at least 2023.

To save money, they are “streamlining hardware testing and scaling back work on flight spare hardware. The project has also reduced the frequency of meetings of the mission’s science team.”

When the reserves in a government budget get this low, it almost always guarantees that the budget will go over. When the reserves get this low this early in the project, it almost always guarantees that the budget will go over, by a lot.

There have been other indications that Europa Clipper’s budget is in trouble. In March NASA canceled one science instrument to save money.

Making matter worse has been our lovely Congress, which has required this mission fly on its bloated, over-budget, and behind schedule SLS rocket, a mandate that is also costing the project an additional $1.5 billion (for the launch) while threatening its launch date (because of SLS delays). NASA would rather have the option to launch Clipper on the more reliable commercial and already operational Falcon Heavy, for about $100 million, thereby saving more than a billion dollars while guaranteeing its launch date. Congress so far has refused to budge, and has in fact insisted that the mission be delayed several years if necessary for getting it on SLS.

Meanwhile, Clipper itself is doing what too many big NASA projects routinely do, go overbudget.

Our federal government. Doesn’t its management skills just warm your heart?

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SpaceX’s next Starship test flight will go almost eight miles high

10:08 am

Capitalism in space: In its licensing request to the FCC SpaceX has revealed that its next Starship test flight, set to take off sometime between March and September of this year, will take off and land in its space facility in Boca Chica, Texas, and go almost eight miles high.

The filing also indicates the test could possibly go as high as twelve miles.

In related news, the company has announced a job fair this week, aimed at hiring people to work on Starship at Boca Chica. Want to help build the first totally reusable rocket? Here’s your chance.

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Bezos sells another $1.8 billion in Amazon stock

9:56 am

Capitalism in space: This past week Amazon CEO Jeff Bezos sold more than $1.8 billion of his Amazon stock, apparently as part of his continuing effort to fund his space company Blue Origin in the development of its suborbital New Shepard spacecraft, its New Glenn orbital rocket, and its Blue Moon lunar lander.

In 2017 Bezos had said he would sell off about a billion dollars per year to fund Blue Origin. However, a survey of these stock sales suggests he has upped that figured considerably, with higher sales more frequently. His first big stock sale was in May 2017 for $1 billion. The second was in November 2017 for another billion. Then in August 2018 Bezos did two stock sell-offs within a week of each other, totaling $2.8 billion.

Now, in February 2020, he has raised another $1.8 billion by selling his Amazon stock. All told, he has raised $6.6 billion in cash in just three years. According to him, all of it is supposedly for Blue Origin, though there is no public information to confirm this.

With that much cash, Bezos’s Blue Origin is likely the best funded space company in the world, and should have enough capital to build almost anything it wants.

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Momentus announces new customer for its cubesat upper stage services

9:34 am

Capitalism in space: Momentus, an company that is offering an upper stage to move tiny cubesats into higher orbits after launch, has announced that the United Kingdom cubesat company SteamJet has purchased that upper stage for use when its next satellite is launched on a Russian Soyuz rocket later this year.

Momentus’s approach signals a fundamental change that commercial space is now undergoing. Traditionally the launch company would provide this kind of service, but for cubesats flying as secondary payloads that isn’t possible. Momentus is thus taking it on as an independent secondary launch service for cubesats alone. With this announcement the company already has five customers, with launches scheduled for the next two years.

SteamJet also is most intriguing along these same lines.

Once in orbit, SteamJet intends to demonstrate a propulsion system that uses water or another low pressure, non-toxic, non-corrosive fluid propellant to create thrust. SteamJet houses its propulsion system in a module shaped like a tuna can that attaches to the exterior of a cubesat.

A lot of exciting things are going to be happening in space in this coming decade, and almost all will be because of private enterprise, freedom, and competition, fueled by profit.

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SpaceX wins another NASA launch contract

9:19 am

Capitalism in space: NASA yesterday awarded SpaceX the launch contract, estimated to cost about $80 million, to launch its Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) climate mission.

That cost number seems high for a SpaceX launch, especially because, according to this Space News article, the launch will be using a reused first stage. For such launches SpaceX has generally been charging less than its standard $67 million, usually about $50 million. The press release says the contract covers both the launch and “other mission related services” but I cannot see how those additional services could raise the price almost 40%.

Unless someone at NASA is willing to prove me wrong, I suspect this is merely the case of our vaunted federal government overpaying for a service, simply because it isn’t their money and they are willing to spend extra for no reason other than it makes their job easier. Or possibly they are now playing favorites, and throwing extra money SpaceX’s way to help the company in its other endeavors, a method of funding that is really inappropriate.

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Frozen lava that flowed from Elysium Mons

1:51 pm

Lava flows off of Elysium Mons
Click for full image.

Cool image time! The photo on the right, rotated, cropped, and reduced to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on October 27, 2019. It shows a dramatic lava flow coming off the flanks of the giant volcano Elysium Mons, a flow that has probably been frozen in place for somewhere between 600 million to 3.4 billion years.

If you look close you can see several craters on top of the lava flow. To my eye these impacts look like they occurred when the lava was still soft, which suggests they were debris thrown up by the volcano. This however would be surprising, as the eruption of Elysium Mons is not thought to have been explosive, but slow and steady. Either way, these crater impacts are one of the ways scientists have been able to estimate the age of this volcano and its long frozen flows.

MRO has taken a scattering of high resolution images in this area, all of which are aimed at similar frozen flows coming off the volcano. All are about 250 miles from the caldera, which gives you a sense of the size and extent of Elysium Mons. While it is the fourth largest volcano on Mars at 7.5 miles high, its grade is so gentle that if you were standing on the surface the peak would be hard to see from any point.

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New simulations of Pluto’s atmosphere

9:42 am

New simulations of Pluto’s atmosphere, created using data obtained during the 2015 fly-by by New Horizons of Pluto, suggest that the planet’s thin atmosphere, mostly made up of nitrogen, generally blows in a retrograde direction when compared with the planet’s rotation.

Bertrand and his colleagues set out to determine how circulating air – which is 100,000 times thinner than that of Earth’s – might shape features on the surface. The team pulled data from New Horizons’ 2015 flyby to depict Pluto’s topography and its blankets of nitrogen ice. They then simulated the nitrogen cycle with a weather forecast model and assessed how winds blew across the surface.

The group discovered Pluto’s winds above 4 kilometers (2.5 miles) blow to the west — the opposite direction from the dwarf planet’s eastern spin — in a retro-rotation during most of its year. As nitrogen within Tombaugh Regio vaporizes in the north and becomes ice in the south, its movement triggers westward winds, according to the new study.

The press release is very badly written. It tries to make it sound as this work discovered the atmosphere of Pluto, and that this process is more unique in the solar system than it is. It also neglects to mention that we only have good information about one hemisphere of Pluto. The fly-by did not see the planet’s other half, and so any computer model based on New Horizons’ data is by definition guaranteed to be half incomplete, with gigantic uncertainties.

Still, it gives us another example of the unexpected complexity of the geological processes on Pluto, something no one expected for a place so far from the Sun where there is so little energy to drive such processes.

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Yutu-2 and Chang’e-5 complete 14th lunar day

9:10 am

China’s Yutu-2 rover and Chang’e-5 lander have successfully completed their fourteenth lunar day of operations on the far side of the Moon, and have gone into hibernation.

The report from China’s state-run news agency is, as usual, decidedly uninformative. It is written to make it appear that Yutu-2 traveled 367 meters during this most recent lunar day, when in truth that is the total distance since landing. In comparing this total with the total at the end of the thirteenth lunar day, we find that Yutu-2 actually traveled only ten meters.

The report also provided no other information about where the rover went, or what it has been doing, other than saying the rover and its instruments operated as “planned.” The article did not even include a picture, either new or old.

It is a shame that China operates in this secret way. They are doing good stuff on the Moon. If they touted it proudly to the world, in as much detail as possible, they would do themselves far more good.

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How to spot a glacier on Mars

3:34 pm

A glacier on Mars
Click for full image.

Overview map

The science team for the high resolution camera on Mars Reconnaissance Orbiter (MRO) today posted a nice lesson on what features to look for when you are trying to find glaciers on Mars.

To do this they used one of the earliest images of a Martian glacier, taken by MRO on June 12, 2008. The image to the right, cropped and reduced to post here, shows that entire glacier, coming off a mesa in the chaos terrain region of Protonilus Mensae, a region of mesas and glaciers that I highlighted in an earlier post in December, showing images of a mesa that had numerous glaciers flowing down from all sides.

The overview map to the right shows the location of both that earlier glacier-surrounded mesa (the red dot in Protonilus Mensae) and today’s image (the blue dot).

What the MRO science team has done with the image today however is to use it to illustrate the most important geological features that one will see when looking at a Martian glacier.
» Read more

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Mock and Real Mars habitats on Earth

8:49 am

On January 31, 2020 the Mars Society issued a press release touting its newest mock Mars habitat mission to its Mars research station in the high desert of Utah.

During this mission, one crew is operating at MDRS, while a second crew works out of the MAU habitat, which consists of a series of interlocking geometric tents that house crew quarters and a research area. The crew is made up of medical professionals who are testing how two teams on the same planet would collaborate on emergency medical procedures.

Located in southern Utah, MDRS serves as a home base for crews participating in Mars surface simulation testing and training. Depending on the individual crew’s specialization, its scientific focus ranges from geology to engineering, communications to human factors, robotics to microbiology. A wide variety of scientific and engineering research and educational outreach are typically conducted by crews at MDRS.

The newly-arrived MAU participants (designated as Crew 220) have set up their temporary second habitat close to MDRS, with part of the crew staying at the MDRS facility, while an additional crew is housed in the MAU-developed habitat out of sight of the main station. Halfway through the mission, the crews will rotate stations, thereby allowing each team an opportunity to experience both operational habitats.

While this simulated mission will certainly learn a few things about long term isolation by small crews, it does not appear to me to be a very real simulation of living on Mars. While the MDRS facility is quite sophisticated, it isn’t an entirely closed system. Moreover, the environment here, even in winter, does not come close to simulating the Martian environment. It is too warm and it has is a full atmosphere. And it certainly is not isolated. If someone gets seriously ill, or the facility experiences an irreversible failure, immediate evacuation is always an option.

Still, the Mars Society has been using this facility for simulating Mars missions since 2001, and has completed eighteen field seasons involving more than 1,200 participants. I am sure they have accumulated a great deal of useful data that can be applied on future Mars missions.

However, the U.S. has been running a much more realistic Mars simulation habitat since just after the end of World War II, and it appears that few realize it.
» Read more

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Maxar wins NASA contract to build robot for assembling test large antenna dishes in orbit

10:26 am

NASA has awarded the private company Maxar a contract to build a robot that will assemble a test large antenna dish in orbit.

The robot will fly as part of the Restore-L mission, whose primary robotic mission goal will be to refuel Landsat-7, originally launched in 1999.

Al Tadros, Maxar’s vice president of space infrastructure and civil space, said the NASA contract funds SPIDER through completion. It also funds a SPIDER demonstration with Tethers Unlimited’s MakerSat to build a 10-meter boom in space and attach it to Restore-L, he said.

Maxar’s demonstration contract calls for the in-orbit assembly of multiple antenna reflector dishes into one single reflector. Communications satellites use reflectors to beam television channels and internet connectivity to users. Maxar said SPIDER’s demonstration could show how commercial satellites and telescopes could carry fixtures currently too large to fit inside rocket payload fairings.

Restore-L was originally targeted for a 2022 launch, but this new contract implies that it might launch later to include this additional test.

The decision by the Trump administration to go all-in with the use of private space to get things done is bearing fruit. In the past, when NASA insisted that it build everything, it didn’t have the resources to do very much. Now that it is harnessing the skills of many independent companies to build many different things (from launchers to landers to rovers), suddenly more is getting done for less in less time. For example, Restore-L is a NASA built project that has taken more than a decade to reach orbit. NASA has now added a private component that it intends to fly in five years.

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Russian satellite rendezvouses with U.S. military satellite

10:11 am

A Russian military satellite, dubbed Inspector and supposedly designed to “monitor other [Russian] satellites in orbit”, has rendezvoused with a U.S. military satellite satellite, and is maintain a distance of about 200 miles.

With such a close range, it allows Cosmos 2542 to take numerous photographs of USA 245. “The relative orbit is actually pretty cleverly designed,” Thompson wrote. “Cosmos 2542 can observe one side of the KH-11 when both satellites first come into sunlight, and by the time they enter eclipse, it has migrated to the other side.”

Some news reports have suggested this might be a precursor to an attempt to destroy the U.S. satellite, but that is silly hype. The Russians have apparently decided to use their long ago developed technology for unmanned rendezvous (with Progress freighters to manned space stations) for military surveillance in space. There is nothing illegal about them doing this.

From the U.S. military perspective, this Russian action however once again points out the need to not depend on large big and expensive satellites that are launched rarely and are difficult to replace. They are too vulnerable. Better to put up many small and cheap satellites that are easy to replace and also act to provide redundancy.

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A Martian avalanche: before and after

6:35 pm

A Martian avalanche: before and after
Click for full resolution animation.

Cool image time! The science team for the high resolution camera of Mars Reconnaissance Orbiter (MRO) today released a beautiful blink animation showing the before and after terrain at an avalanche site along the scarp of Mars’s north pole ice cap.

The animation is very cool, but it is also helpful to align the two images next to each other to carefully study what actually changed. The image to the right, cropped and reduced here, shows both photos. (Thank you to planetary scientist Shane Byrne for splitting the animation for me.). I have added the white bars to indicate the cliff section that broke off during the avalanche. That section was made of water ice, with probably some dust and rocks mixed in, and broke into the blocks that are now scattered on the ground below.

This avalanche itself is actually not unusual and as I noted in an earlier post, is part of an annual season of numerous avalanches that occur on this northern scarp of the polar ice cap each spring. As written by Dr. Candice Hansen of the Planetary Science Institute in Tucson, Arizona,

Every spring the sun shines on the side of the stack of layers at the North Pole of Mars known as the north polar layered deposits. The warmth destabilizes the ice and blocks break loose. When they reach the bottom of the more than 500 meter tall cliff face [about 1,600 feet], the blocks kick up a cloud of dust.

And as Byrne noted to me in an interview when I asked him how it was possible for MRO to image so many avalanches, as they occur,

“It is incredible. I think this is the most incredible thing about the whole process.” said Byrne. “If you fly over a mountain range on the Earth and take a picture, the chances catching an avalanche in progress are almost zero. But on Mars half of the images we take in the right season contain an avalanche. There’s one image that has four avalanches going off simultaneously at different parts of the scarp. There must be hundreds to thousands of these events each day.”

In an email exchange with him today, he also added that this is not the first before and after comparison images obtained. “We’ve been seeing these blockfalls for several years now. That’s partly why these scarps are being so intensively monitored by HiRISE.”

Do these avalanches mean that the Martian northern polar ice cap is shrinking? Maybe, maybe not. Right now scientists think the cap is in a steady state, neither growing or shrinking. These events are thus more likely comparable to the routine calving of ice sections from the foots of glaciers here on Earth, a common tourist destination in the waters of western Alaskan coast.

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Strange parallel grooves in Martian crater floor

9:30 am

Parallell ridges and ruts in Martian crater floor
Click for full image.

Full crater view
Click for full image.

Cool image time! The image above, cropped to post here, was taken on December 2, 2019 by the high resolution camera of Mars Reconnaissance Orbiter (MRO) of a crater in the northern lowlands of Mars. It focuses in on the strange lineated ruts and ridges found on the crater’s central floor, as indicated by the black box on the wide shot to the right.

The north-south alignment of these groves suggests to me that they are wind caused, as if dust and sand had ponded in the crater’s lowest point and was then shaped by the prevalent winds. They also appear solid and old, as if this shaping occurred a long time ago and they are now decaying with time.

This location is at the same latitude as the plains around Erebus Montes, the prime candidate landing site for SpaceX’s Starship, and a region where a lot of shallow subsurface ice has been detected. It lies due west of that region, separated by the north-south Phlegra Montes mountain chain. At this latitude, 36 degrees north, scientists have found ample evidence of water ice, though some regions have more than others. This crater sits on the edge of this particular rich area, which might explain why the crater looks more solid and dry than others at similar latitudes. There simply might be less ice here, or the ice lies deeper below the surface.

I am off with Diane on a hike this morning, so this cool image fills in for my normal morning news posting. I should catch up this afternoon.

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Rocket Lab successfully launches U.S. reconnaissance satellite

12:31 am

Capitalism in space: Rocket Lab today successfully launched a U.S. reconnaissance satellite for the National Reconnaissance Office.

They also had the first stage do a guided re-entry after stage separation, continuing their testing which they hope will eventually lead to the recovery and reuse of these stages.

The leaders in the 2020 launch race:

3 China
2 SpaceX
1 Arianespace (Europe)
1 Rocket Lab

The U.S. and China are now tied 3-3 in the national rankings.

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You Use a Cartridge Razor? Dump it!

6:01 pm

An evening pause: Recently my cousin Ken Kueny, a former software manager at Orbital ATK and now the owner of Karn Custom Woodwork, a major carpentry company in Virginia, made me aware of a new example in the movement to buy dumb (rejecting modern hi-tech for older technology developed in the 20th century), this time related to shaving utensils. Apparently, men appear to be abandoning the modern expensive cartridge multi-blade razors for old-fashioned safety razors and double-edged blades.

I, who hate shaving and have a beard partly so that I only have to do a trimming about twice a week, was astonished. The video below gives a quick lesson on how to shave with a safety razor, for those too young to remember these tools. It also gives a sense of why it is better to do it this way. This video shows just a sampling of the many different types of available safety razors, and the engineering differences for each. Do a search on youtube and you will see numerous similar videos touting the advantages of going retro when shaving. All are quite convincing.

This new trend won’t make me shave my beard, as I also like it very much, but it does illustrate once again that while new designs can certainly improve things, newer is not always better.

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NASA signs agreement with private company to train private astronauts

4:33 pm

Capitalism in space: A private company based in Houston, KBR, has signed an agreement with NASA to train private astronauts for flights to and from ISS.

It appears that KBR has been providing NASA support services for quite awhile, such as some ISS command and control operations. This agreement appears to give them some NASA support, such as access to NASA training facilities, as they start offering their astronaut training services to private customers.

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