Category: Points of Information

Very brief descriptions, with appropriate links, of current or recent news items.

Enclosed Martian canyon, filled with ice

1:28 pm

Ice-filled canyon on Mars
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 on November 21, 2019. The uncaptioned image was simply entitled “Ice-filled Graben.”

The location is on the lower flanks of the giant volcano Alba Mons, which in itself sits north of Olympus Mons and the volcanic Tharsis Bulge. The canyon is called a graben because it was formed when a section of the crust slips downward along parallel faults. It does not have the features of a rill, or lava flow, as it starts and stops suddenly. It probably formed due to the rise of the volcano, pulling apart its flanks along faults, causing some sections then to slip downward.

How do the scientists know this is ice-filled? I suspect they have other data that indicates the presence of water, but there are also clear features inside this canyon that resemble the glacial features found elsewhere on Mars. For example, note the parallel lines near the canyon walls. These indicate past surface levels as well as layers within the ice from cyclic climate processes. The line of pits along the southwest wall, where the surface gets more sunlight, also suggests that this sunlight is causing more ice to sublimate away.

Finally, the graben is located at 46 degrees north latitude, definitely far enough north for such ice to exist, based on ample other research.

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College apologizes because teacher accurately quotes historical document

9:43 am

The coming dark age: The head of the University of Oklahoma has publicly apologized for a journalism professor because that professor had, after warning the class, accurately read aloud an historical document that included the word “nigger.”

The heart of the apology says it all:

The professor, a faculty member in History, read from a historical document that used the “N-word” repeatedly. While she could have made the point without reciting the actual word, she chose otherwise. Her issuance of a “trigger warning” before her recitation does not lessen the pain caused by the use of the word. For students in the class, as well as members of our community, this was another painful experience. It is common sense to avoid uttering the most offensive word in the English language, especially in an environment where the speaker holds the power.

This apology is downright hostile to the pursuit of knowledge, and coming from the head of a university is especially appalling.

My regular readers know that I forbid the use of obscenities by commenters, as I oppose the recent cultural trend to make their use ubiquitous and casual. I think it debases everyone, and prevents thoughtful debate. However, if you want to get an accurate sense of history you must have the open-mindedness to tolerate hearing such things in order to understand that history.

Moreover, this administrator assumes that his students are so pathetically weak and delicate that hearing this word would destroy them. Poppy-cock! What is really happening is that he is bowing to the race-mongers and political bullies who have been using their demands on what language to speak to force everyone to endorse their political rule.

The future is grim if it will become impossible to learn anything that might offend you. In fact, in that culture you really will not be able to learn anything at all.

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NASA leaning towards long-duration flight for 1st Dragon mission

9:11 am

Capitalism in space: According to one former astronaut as well as a review of photos of the training being given to the astronauts who will fly on SpaceX’s first manned Dragon flight, this Space News article thinks that NASA will make that first flight a long-duration mission.

This Dragon demo mission is officially still planned as a short mission, no more than two weeks. To extend it requires additional training, which the photos appear to show, and would thus delay its launch by as yet an unspecified time period.

The article also cites a third reason NASA is now favoring the long-duration option: The issues with Boeing’s manned Starliner capsule:

Another factor in any decision to extend Demo-2 is the status of the other commercial crew vehicle, Boeing’s CST-100 Starliner. That vehicle flew an uncrewed test flight in December, but software problems during the flight, including one which shortened the mission and prevented a docking with the ISS, have raised questions about whether a second uncrewed test flight will be needed. An investigation into those problems is expected by the end of this month.

Even if NASA decides a second uncrewed test flight of Starliner is not needed, a review of all of the spacecraft’s one million lines of code, and other reviews, is likely to delay a crewed test flight of the spacecraft. NASA and Boeing had previously agreed to make that test flight a long-duration mission, with NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson performing space station training in addition to that for the Starliner itself.

The delay in Boeing’s long duration mission leaves a gap in the schedule for maintaining crews on ISS. Flying Dragon long-duration would help solve that.

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Confirmed: Betelguese is brightening, as predicted

1:58 pm

More observations have now confirmed that Betelguese is once again brightening, as predicted.

Photometry secured over the last ~2 weeks shows that Betelgeuse has stopped its large decline of delta-V of ~1.0 mag relative to September 2019. The star reached a mean light minimum of = 1.614 +/- 0.008 mag during 07-13 February 2020. This is approximately 424+/-4 days after the last (shallower: V ~ +0.9 mag) light minimum was observed in mid-December 2018. Thus the present fading episode is consistent with the continuation of the persistent 420-430 day period present in prior photometry.

In other words, the star’s dimming, though deeper than earlier dips, was right in line with a well-known variation cycle. While absolutely worth close observation and study, the data now strongly suggests that this is relatively normal behavior for this aging red giant star. It will likely go supernova sometime in the future, not likely now.

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Quakes by InSight indicate Mars’ interior is active

1:01 pm

Cerberus Fossae

The first seismic results from InSight’s seismometer now show that the interior of Mars is active, with regular moderately-sized quakes.

The Seismic Experiment for Interior Structure (SEIS) instrument – a seismometer developed by an international consortium under the leadership of the French space agency CNES – recorded a total of 174 seismic events between February and September 2019. Twenty of these marsquakes had a magnitude of between three and four. Quakes of this intensity correspond to weak seismic activity of the kind that occurs repeatedly on Earth in the middle of continental plates, for example in Germany on the southern edge of the Swabian Jura hills.

Although only one measurement station is available, models of wave propagation in the Martian soil have been used to determine the probable source of two of these quakes. It is located in the Cerberus Fossae region, a young volcanic area approximately 1700 kilometres east of the landing site.

Cerberus Fossae is a land of cracks and linear depressions located between the giant volcanoes, Elysium Mons to the north and Olympus Mons to the east. It is believed those fissures were caused by the rise of those volcanoes, stretching the crust and cracking it.

This new data from InSight strengthens this theory.

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Space Force lobbies for $1 billion extra

8:30 am

The Space Force has put forth an extra wish list of missions/projects that require an $1 billion more above the $15 billion the agency has already requested in the next federal budget for 2021.

While about 10 percent of the request is for classified programs, the remaining funding runs the gamut, from bolstering space situational awareness to accelerating the development of navigational satellites to establishing new commercial satellite communication capabilities in low earth orbit.

Overall this wish list appears properly focused, aimed at upgrading or improving existing space military assets rather than growing the Space Force’s bureaucracy. We shall see over time if this proves true. I can’t help having doubts.

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New OSIRIS-REx close-up image of secondary asteroid landing site

9:40 am

Osprey landing site on Bennu
Click for full image.

The OSIRIS-REx science team today released one of the images taken during the spacecraft’s recent close reconnaissance of its secondary touch-and-go landing site on the asteroid Bennu.

I have cropped their oblique image to focus, in full resolution, on that landing site, dubbed Osprey, which is the crater on the left side of the photo. The boulder in that crater “is 17 ft (5.2 m) long, which is about the length of a box truck.”

After the fly-by, the science team had announced that the spacecraft’s laser altimeter had failed to operate, and the images taken by its highest resolution camera (not the camera that took today’s image) “are likely out of focus.”

Based on this image, what look like tiny pebbles inside the crater are actually boulders ranging in size from mere inches to as much as five feet across. If their high resolution images are soft, it will thus be hard to map out the terrain sufficiently to safely make a touch-and-go landing here.

More important, there is still no word on whether they have fixed the laser altimeter. Without it I suspect a landing will be very difficult, if not impossible.

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SpaceX seeking $250 million more in investment capital

9:24 am

Capitalism in space: According to anonymous sources, SpaceX is once again seeking more investment capital, this time totaling $250 million.

Last year the company raised $1.33 billion. While not as much as the personal cash that Jeff Bezos has raised for Blue Origin by selling his personal Amazon stock, it has been enough for SpaceX to accomplish far more. Not only is the company about to launch its first manned mission, it has quickly begun assembling its Starlink internet constellation in orbit, while pushing forward on Starship construction.

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First SLS launch pushed back again to April 2021

9:15 am

NASA on February 20, 2020 finally admitted that the first SLS launch cannot happen in 2020, and set a new target date no earlier than April 18, 2021.

The previous target launch date in November 2020 was always a pure fantasy. NASA just held off admitting it in order to defuse any political consequences for having a program, building SLS, that will end up taking them almost two decades to complete.

This new launch date is likely the most realistic so far, since the hardware for SLS is actually finally coming together. Nonetheless, if anything at all should go wrong along the way, especially with the full static test firing of the core booster of the first stage scheduled for no earlier than August, then expect more delays, possibly lasting years.

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Engineers to use InSight’s scoop to help digging process

7:38 pm

Insight’s engineers, having failed to get its mole pile driver to dig down as planned, now plan to use the lander’s scoop to push on the mole in the hope this will prevent it from popping up with each hammer drive.

[T]he mole is a 16-inch-long (40-centimeter-long) spike equipped with an internal hammering mechanism. While burrowing into the soil, it is designed to drag with it a ribbonlike tether that extends from the spacecraft. Temperature sensors are embedded along the tether to measure heat coming deep from within the planet’s interior.

…The team has avoided pushing on the back cap [at the top of the mole] until now to avoid any potential damage to the tether.

It appears to me that they are running out of options. This new attempt carries risks. It could damage the tether required to obtain underground temperature readings, the prime purpose of the experiment. However, if they don’t get the tether into the ground, this will also prevent the experiment from functioning. Thus, this attempt could essentially be a Hail Mary pass, gambling all on one last all-or-nothing gambit.

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Airbus to cut 2,362 jobs, citing weak space market

7:23 pm

Capitalism in space: Airbus announced this week that it plans to cut 2,362 jobs, citing as the reason “lower performance in space” as well as postponed defense contracts.

This quote from the article is revealing:

Airbus Defence and Space is the third satellite manufacturer to announce layoffs in the past 12 months. Thales Alenia Space said in September it was cutting around 6% of its workforce, following Maxar’s February 2019 announcement that it would dismiss roughly 3% of its employees.

The article however also indicates that 2019 saw a big recovery in geosynchronous satellite orders.

Though not stated, I suspect that part of Airbus’s problem is related to Ariane 6, which it is building in a joint partnership with Safran dubbed ArianeGroup. While designed to be less expensive to build, the rocket is not reusable, and its launch price is simply not competitive. Thus, getting contract orders has been very difficult.

Note also that ArianeGroup announced in November 2018 that it going to cut 2,300 jobs by 2022. I wonder if some of these cuts overlap the newly announced cuts.

Either way, these trims might be a good thing as Airbus and ArianeGroup work to cut their costs. Or they could be a bad thing, indicating that both are having trouble making sales. Only time will tell.

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