Tag: science

In the midst of Mars’ volcano country

12:26 pm

lava channel
Click for full image.

Cool image time! While the rest of the world is entirely focused on panic and disease, I am going to go on with my life. The photo to the right, rotated, cropped, and reduced to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on December 26, 2019. I suspected this channel was lava, and when I asked Colin Dundas of the U.S. Geological Survey’s Astrogeology Science Center in Arizona, he confirmed my suspicion.

Yes, that surface appears to be lava–it is part of the Elysium plains, which have many geologically-young lava flows. It’s likely that the channel is a lava channel, and the surrounding plains may be from an earlier stage of the same eruption.

The entire surface of the channel and the surrounding plains appear very fresh, mostly because of their smoothness and lack of many craters. You can also see what looks like a recent impact (the small dark splotch near the left edge about two-thirds from the top).

The fresh and smooth look of Elysium Planitia generally has led scientists to conclude that much of this region is formed from lava flows, some relatively recently. Thus, this particular lava channel is smack dab in the middle of Mars’ volcano country, quite vast and extensive. The context map below illustrates this.
» Read more

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Europe’s BepiColumbo mission to Mercury threatened by COVID-19

8:58 am

Because of the strict rules and work suspensions imposed due to the Wuhan virus panic, there will be a reduced workforce during the April 10, 2020 fly-by of Earth by the European Space Agency’s (ESA) BepiColumbo Mercury mission.

The press release tries to make it sound like they are heroically working through the fly-by, but the truth is revealed far down in the text:

The operation, however, will be performed with limited personnel at ESA’s European Space Operations Centre (ESOC) in Darmstadt, Germany, where engineers will have to comply with social distancing rules presently in place all over Europe as a response to the coronavirus pandemic. “The Earth swing-by is a phase where we need daily contact with the spacecraft,” says Elsa Montagnon, BepiColombo Spacecraft Operations Manager at ESA. “This is something that we cannot postpone. The spacecraft will swing by Earth independently in any case.”

The coronavirus threat forces the team to work with minimal face to face interaction while ensuring all steps in the process are properly covered. “During the critical two weeks prior to the closest approach, we need to upload safety commands to prepare the spacecraft for unexpected problems,” says Christoph Steiger, BepiColombo Deputy Spacecraft Operations Manager. “For example, we need to prepare the transfer module for the 34 minute-long eclipse when its solar panels will not be exposed to sunlight to prevent battery discharge.”

Operations can still be conducted as planned, he adds, but will require more effort and attention than in a normal situation. [emphasis mine]

I suspect that much of the software work is now being done remotely, but there is no doubt the inability to be present in the control room will prevent any quick fix, should the spacecraft need help during the fly-by.

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Quick fading of a Martian impact crater

2:37 pm

Fresh impact crater on Mars, in 2010
Click for full image.

The same impact, four Martian years later.
Click for full image.

Cool image time! Though it seems that no one is really interested in anything but the Wuhan virus and the attempt by our corrupt politicians to use it to gain power, I think that life requires more from us than politics and panic. Thus, I am going to keep posting pure science and cool images.

The two photos to the right were taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) almost ten years apart. They were both posted as captioned images, the first in 2010, the second on March 19, 2020 to illustrate the remarkable fading of a fresh impact’s dark ejecta, in only about four Martian years.

The March 19, 2020 captioned image included an animation to illustrate the change. I prefer putting the two images side-by-side. Either way, the change is striking. As planetary scientist Alfred McEwen noted in his caption, “the dark material has faded into the background, while the new 6.3-meter diameter crater persists.”

Wind and dust storms probably acted to wipe out the dark material, but the process did not take that long, and last year’s global dust storm was not a major factor, since much of the dark material was already gone in this July 2012 image.

The crater itself is located in Arcadia Planitia, just west of the Erebus Mountains, the very region in the northern lowlands that SpaceX has made its primary candidate landing site for its Starship rocket, partly because the terrain is flat which makes landing easy, and partly because there is amply evidence that these lowlands have lots of ice just below the surface. And the full image for the 2019 photo reinforces this conclusion. Much of the rougher ground south of the impact appears to be the partially sublimated surface of an ice block.

So, while this region will provide an easy smooth landing site and plenty of water for the first human arrivals, those humans will also have to contend with a planet without a thick atmosphere to protect them from most meteorites. Rare as these events are, they happen more often because of Mars’ location closer to the asteroid belt, and they hit the surface far more frequently.

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Mars: Volcanic, Glacial, or Fluvial?

12:08 pm

Sinuous ridge on Mars
Click for full image.

Cool image time! The photograph on the right, rotated, cropped, and reduced to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on September 30, 2019. It shows what the image title dubs a “sinuous ridge” in a region called Tempe Terra.

What caused it? At first glance the meandering nature of the ridge suggests it was originally a riverbed, formed by flowing water. Eventually the water dried up, and because that riverbed was made of harder material than the surrounding terrain, long term erosion caused that surrounding terrain to wear away, leaving a raised ridge where the river used to be. Scientists have found many such inverted channels on Mars.

Not so fast!
» Read more

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New radio telescope discovers many new Fast Radio Bursts

4:01 pm

A new radio telescope in Canada, designed to detect the mysterious and as-yet unexplained Fast Radio Bursts (FRB), has in the past year raised the total of known FRBs from 30 to 700, including nine repeating bursts.

This confirms an earlier very preliminary analysis that there were two different types of bursts, those that repeat and those that don’t.

Warning: It is very dangerous to take these results too seriously. A lot of uncertainty exists, including some basic facts about the bursts.

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European planetary missions go dark because of Wuhan virus

2:56 pm

The European Space Agency has suspended operations and shut down several planetary missions, including two Mars orbiters and two solar missions, because of lockdowns imposed because of COVID-19.

The problem is that they don’t have enough people in their mission controls to operate everything. They are shutting these down so that they can continue operations on their Mecury mission BepiColumbo, for example.

The article also tries to lay the blame for the recently announced launch delay of Europe’s Mars 2020 rover to 2022 on the virus, but that’s false. The mission was delayed because it simply wasn’t ready.

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Martian plateaus and buttes

1:38 pm

Martian plateaus and buttes
Click for full image.

Cool image time! Rather than sit in cowering fear, as it appears too many worldwide are doing, I am going to stay calm and carry on. The photo to the right, rotated, cropped, and reduced in resolution to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on January 20, 2020. It shows a small section of a region dubbed Iani Chaos, a terrain dubbed such by scientists because of its cracked and chaotic nature, flat-topped mesas cut by canyons and fissures.

Chaos terrain is generally found in the transition zones on Mars between its southern highlands and northern lowlands. It was formed over time by erosion processes, either liquid water or ice, that slowly washed out the material along fault-lines, leaving mesas behind. This particular spot in Iani Chaos appears to be late in this process, with the gaps between the buttes wide and many of the mesas worn down into pointy knobs.

The location of Iani Chaos, as shown in the map below, tells us much about its history.
» Read more

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Layers upon layers upon layers on Mars

11:13 am

Layered mesa on Mars
Click for full image.

Cool image time! Or rather, a bunch of cool images! On February 17, 2020 the science team for the high resolution camera on Mars Reconnaissance Orbiter (MRO) released a very cool captioned photograph of a terraced mesa in a crater just north of Hellas Basin, shown in the image to the right, rotated, cropped, and reduced to post here.

The color strip down the center of this image illustrates how the colors of the different layers indicate the different make-up of each. These distinctions are not obvious in black & white. That array of colors also leads to some very beautiful scenery, as noted by planetary scientist Alfred McEwen in his caption:

Sedimentary layers record a history of Mars’ erosion and deposition by water and wind, and they make great landscapes for future interplanetary parks.

That this terraced mesa is located on the northern edge of Hellas Basin, the basement of Mars, is possibly not surprising. Other similarly terraced mesas like this have been found on the basin’s eastern edge, highlighted in my September 2019 post. The geology here appears to encourage this kind of erosion, where the different sedimentary bedrock layers erode away at different rates, leaving behind terraced mesas.

Terraced layers on Mars however come in other varieties, some of which build up over time instead of getting eroded away.
» Read more

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Webb telescope further delayed by COVID-19

10:38 am

As part of its decision to shut down most of the agency’s operations due to fear of the COVID-19 virus, NASA’s has suspended all work on the James Webb Telescope, further delaying this much delayed space telescope.

The follow-on to the popular Hubble Space Telescope [Ed: a NASA lie that is not true], years late and billions over budget, it was on track for launch in March 2021, though some NASA officials were hinting there might be another delay. Today’s action almost certainly assures it. “The James Webb Space Telescope team … is suspending integration and testing operations. Decisions could be adjusted as the situation continues to unfold over the weekend and into next week. The decision was made to ensure the safety of the workforce. The observatory remains safe in its cleanroom environment.” — NASA

I must repeat this incessantly, as it appears too many modern space reporters are very ignorant about their own field. Webb is not a” follow-on to Hubble.” Astronomers made the decision in the late 1990s to build an infrared space telescope instead, which is what Webb is. For more than a decade they, and NASA, lied to the public about this, claiming Webb was a better version of Hubble, in order to garner support for building Webb.

I have been calling NASA on lie this since 2008, when I wrote The Universe in a Mirror, which I think eventually forced the agency to stop doing it. It is shameful however for a reporter now, in 2020, to still spread it.

As for Webb, this decision by NASA will certainly delay it again. The project is already fourteen years behind schedule, with its budget ballooning from $500 million to about $10 billion. All told, a perfect example of government in action.

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Friday at the non-existent Lunar & Planetary Science Conference

1:38 pm

Global distribution of Martian ice scarps
Today was supposed to have been the last day at the cancelled 51st annual Lunar & Planetary Science conference. As such, only a half day of presentations had been scheduled in order to give participants the option of returning home sooner.

While many of the abstracts of the planned-but-now-cancelled presentations were on subjects important to the scientists but not so interesting to the general public, two sessions, one on Martian buried glaciers/ice and a second focused on Mercury, would have made the day very worthwhile to this science journalist, had I been there.

The map above, from the first abstract [pdf] of the Mars session, might possibly epitomize our present knowledge of ice/glaciers on Mars. It provides an update of the continuing survey of ice scarps in the high mid-latitudes of Mars (see the most recent post on Behind the Black from February 12, 2020). Clearly, the more they look, the more they find of these ice scarps, cliff faces with visible exposed pure ice layers that will be relatively easy to access.

But then, finding evidence of some form of buried ice on Mars is becoming almost routine. Of the thirteen abstracts in this Mars session, ten described some sort of evidence of buried ice or glaciers on Mars, in all sorts of places, with the remaining three abstracts studying similar Earth features for comparison. The scientists found evidence of water ice on the top of one of Mars’ largest volcanoes (abstract #2299 [pdf]), in faults and fissures near the equator (#1997 [pdf]), in the eastern margin of one of Mars’ largest deep basins (#3070 [pdf]), in Gale Crater (#2609 [pdf]), in the transition zone between the northern lowlands and southern highlands (#1074 [pdf]), and of course in the northern mid-latitude lowland plains (#2648 [pdf] and #2872 [pdf]).

The results tell us not that there is water ice on Mars, but that it is very plentiful, and that its presence and behavior (as glaciers, as snowfall, and as an underground aquifer) make it a major factor in explaining the geology we see on Mars. I’ve even begun to get a sense that among the planetary scientists researching Mars there is an increasing consideration that maybe ice formed many of the river-like features we see on the surface, not flowing water as has been assumed for decades. This theory has not yet become dominate or even popular, but I have been seeing mention of it increasingly in papers, in one form or another.

If this possibility becomes accepted, it would help solve many Martian geological mysteries, primary of which is the fact that scientists cannot yet explain how water flowed as liquid on the surface some time ago in Mars’ long geological history, given its theorized atmosphere and climate. If ice did the shaping, then liquid water (in large amounts) would not be required.

Now, on to the Mercury session.
» Read more

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Inactive hot springs on Mars?

11:43 am

Inactive hot springs on Mars?
Click for full image.

Overview of Vernal Crater

Cool image time! In prepping my report of the interesting abstracts from Friday of the cancelled 51st annual Lunar & Planetary Science conference (to be posted later today), I found myself reading an abstract [pdf] from the astrobiology session about the possibility of now inactive hot springs on Mars! This was such a cool image and possibility I decided to post it separately, first.

The top image to the right, cropped and expanded to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter in 2009. It shows some dark elliptical splotches inside the floor of a crater dubbed Vernal. The second image to the right, taken from the abstract, shows the context, with the top image a wide shot showing the southern half of Vernal Crater where these features are located, and the bottom image zooming into the area of interest. The white box focuses on the elliptical features seen in the first image above. From the abstract:

The elliptical features consist of concentric halos of high but varying albedo, where the highest albedo in each occurs in a small central zone that mimics the shape of the larger anomaly. Each feature is also traversed by circumferential fractures. Several similar tonal features extend for 5-6 km, on stratigraphic trend with the elliptical features. Hypotheses considered for the origin of the elliptical features included springs, mud/lava volcanoes, pingos, and effects of aeolian erosion, ice sublimation, or dust, but the springs alternative was most compatible with all the data.

The abstract theorizes that the small ligher central zone is where hot water might have erupted as “focused fluid injection” (like a geyser), spraying the surround area to form the dark ellipses.

I must emphasize that this hypothesis seems to me very tenuous. We do not really have enough data to really conclude these features come from a formerly active hot spring or geyser, though that certainly could be an explanation. In any case, the geology is quite intriguing, and mysterious enough to justify further research and even a future low cost mission, such as small helicopter drone, when many such missions can be launched frequently and cheaply.

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NASA considering shutting down Curiosity in 2021

8:54 am

Even as the space agency is about to launch a new rover to Mars, it is considering cutting operations for the rover Curiosity as well as considering shutting down its operation as soon as 2021.

Other ongoing missions are threatened by the administration’s fiscal year 2021 budget proposal. “The FY21 budget that the president just recently submitted overall is extremely favorable for the Mars program, but available funding for extended mission longevity is limited,” [said Jim Watzin, director of NASA’s Mars exploration program].

That request would effectively end operations of the Mars Odyssey orbiter, launched in 2001, and reduce the budget for Curiosity from $51.1 million in 2019 to $40 million in 2021, with no funding projected for that rover mission beyond 2021.

The penny-wise-pound-foolish nature of such a decision is breath-taking. Rather than continue, for relatively little cost, running a rover already in place on Mars, the agency will shut it down. And why? So they can initiate other Mars missions costing millions several times more money.

Some of the proposed cuts, such as ending the U.S. funding for Europe’s Mars Express orbiter, make sense. That orbiter has accomplished relatively little, and Europe should be paying for it anyway.

These decisions were announced during a live-stream NASA townhall that was originally to have occurred live at the cancelled Lunar & Planetary Science conference. I suspect its real goal is to garner support for more funding so that the agency will not only get funds for the new missions, it will be able to fund the functioning old ones as well.

Sadly, there would be plenty of money for NASA’s well-run planetary program if our Congress and NASA would stop wasting money on failed projects like Artemis.

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Thursday at the non-existent Lunar & Planetary Science Conference

12:22 pm

Jezero Crater, under theorized ocean

It is now time for today’s virtual report from the non-existent 51st annual Lunar & Planetary Science conference, cancelled because of the terrified fear of COVID-19.

Unlike the previous three days, the bulk of the abstracts for presentations planned for today are more what I like to call “in-the-weeds” reports. The science is all good, but it is more obscure, the kind of work the scientists will be interested in but will generally hold little interest to the general public. For example, while very important for designing future missions, most of the public (along with myself) is not very interested in modeling studies that improve the interpretation of instrument data.

This does not mean there were no abstracts of interest. On the contrary. For today the most interesting sessions in the conference program centered on Mars as well as research attempting to better track, identify, and study Near Earth asteroids (NEAs).

The map above for example shows the location of Jezero Crater, where the rover Perseverance will land in 2021, under what one abstract [pdf] proposed might have been an intermittent ocean. The dark blue indicates where the topography suggests that ocean might have existed, while also indicating its shoreline. If it existed in the past, Perseverance might thus find evidence of features that were “marine in origin.” This ocean would also help explain the gigantic river-like delta that appears to pour into Jezero Crater from its western highland rim.

There were a lot of other abstracts looking closely at Jezero Crater, all in preparation for the upcoming launch of Perseverance in July, some mapping the site’s geology, others studying comparable sites here on Earth.

Other Mars-related abstracts of interest:
» Read more

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French and American studies find drug that can treat COVID-19

10:00 pm

It isn’t a vaccine that will prevent infection, but tests in France and in the U.S. now show that a drug normally used to treat malaria is very effective in reducing the symptoms of the Wuhan virus.

He said that the first Covid-19 patients he had treated with the drug chloroquine had seen a rapid and effective speeding up of their healing process, and a sharp decrease in the amount of time they remained contagious.

Chloroquine – which is normally used mainly to prevent and treat malaria – was administered via the named drug, Plaquenil.

The drug is readily available and can be prescribed to anyone who is considered threatened by the virus to help them get better why reducing the chances of them giving it to others.

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Comet C/2019 ATLAS brightening

4:42 pm

Comet ATLAS, discovered in 2019 by a telescopic survey looking for near Earth asteroids, is brightening more than expected as it approaches the Sun, and could by May be visible to the naked eye.

Jonathan Shanklin, Director of the British Astronomical Association’s Comet Section, reports that the current comet, C/2019 Y4, brightened quite rapidly in mid February, and adds “as of March 11 there is no sign of a slowdown in the rate of brightening. It is already visible in large binoculars . . . The uncertainty in brightness at the time of perihelion is large, though the worst case indicator is 2nd magnitude. It will remain well placed for UK observers into May and could become a prominent object.”

If 2nd magnitude is the dimmest they presently expect, this comet will be one of the brightest objects in the sky come May. Stay tuned!

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Wednesday at the non-existent Lunar & Planetary Science Conference

2:50 pm

The Moon's south pole

My virtual coverage of the cancelled 51st annual Lunar & Planetary Science conference continues today with a review of the abstracts of presentations that were planned for today, but unfortunately will never be presented.

As a side note, the social shutdown being imposed on America due to the panic over COVID-19 has some side benefits, as has been noted in a bunch of stories today. Not only will this possibly destroy the power the left has on college campuses as universities quickly shift to online courses, it will also likely put an end to the endless science conferences that are usually paid for by U.S. tax dollars. (That cost includes not just the expense of the conference, but the fees and transportation costs of the participants, almost all of whom get the money from either their government job or through research grants from the government.)

Anyway, for good or ill, the virus shut down the planetary conference in Texas this week, forcing me to post these daily summaries based not on real presentations where I would have interviewed the scientists and gotten some questions answered, but on their abstracts placed on line beforehand. Today, the three big subjects were the south pole of the Moon (as shown in the map above from one abstract [pdf], produced by one instrument on Lunar Reconnaissance Orbiter [LRO]), the Martian environment, and Titan. I will take them it that order.
» Read more

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Secondary impacts in water ice on Mars

10:13 am

Secondary impact in water ice on Mars
Click for full resolution image.

Cool image time! Today the science team for the high resolution camera on Mars Reconnaissance Orbiter (MRO) released a beautiful captioned image of a secondary impact of an object into the icy plains of Utopia Planitia, the northern lowlands northeast of where the rover Perseverance will land in 2021. The image to the right, cropped and reduced to post here, shows one of several secondary craters in the full image. As planetary scientist Alfred McEwen explains in the caption,

One interpretation [for the crater’s unusual appearance] is that the impact crater exposed nearly pure water ice, which then sublimated away where exposed by the slopes of the crater, expanding the crater’s diameter and producing a scalloped appearance. The small polygons are another indicator of shallow ice.

Note the dunes at the bottom of the crater. This has become a trap of wind-blown sand and dust. Note also how this secondary impact gives us a rough idea of the thickness of this ice, based on the area sublimated away.

There is a lot of relatively accessible ice in those northern lowlands, which is why SpaceX likes them for its possible landing site for Starship. That candidate site is in Arcadia Planitia, on the other side of Mars, but it is still in these same northern lowlands, where scientists have found lots of evidence of buried ice.

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COVID-19: the unwarranted panic

2:41 pm

Four more stories today indicate once again that the worldwide panic over the corona/COVID-19/Wuhan virus is strongly unwarranted:

The first report, from the science journal Science, provides an update on the situation in South Korea, where testing for the virus has been the most thorough of any nation in the world and where, because of that extensive testing, has shown the death rate has turned out to be far lower than the preliminary statistics have suggested. Out of a population of 50 million, slightly more than 8,000 have been infected, with only 81 dying. This is a death rate of 0.9%, higher than the flu’s 0.1% but not horribly so. And like the flu, most of those deaths have been among the elderly.

The numbers there are now dropping, indicating that the disease might have run its course without causing a catastrophic disaster. There is still a chance it could break out again, but the data suggests otherwise.

Moreover, South Korea controlled the situation without any strong-arm authoritarian tactics, as seen in China and as becoming popular here in the formerly free U.S.

“South Korea is a democratic republic, we feel a lockdown is not a reasonable choice,” says Kim Woo-Joo, an infectious disease specialist at Korea University.

It sadly appears that South Koreans might value freedom more than too many of today’s Americans.

The second article describes research from Wuhan in Hubei province in China, reconfirming the South Korean data. There it appears the death rate was 1.4%, only slightly higher than in South Korea. And once again, the death rate is mostly confined to the older population with already existing health issues, like the flu:
» Read more

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Tuesday at the non-existent Lunar & Planetary Science Conference

1:43 pm

Boulder on Bennu with changes in layered texture changes

Today was supposed to have been the second day of the week-long 51st annual Lunar & Planetary Conference, sadly cancelled due to fear of the Wuhan virus. As I had planned to attend, I am now spending each day this week reviewing the abstracts of the planned presentations, and giving my readers a review of what scientists had hoped to present. Because I am not in the room with these scientists, however, I cannot quickly get answers to any questions I might have, so for these daily reports my reporting must be more superficial than I would like.

On this day the most significant reports came from scientists working on the probes to the asteroids Bennu and Ryugu as well as the probes to the Moon. The image to right for example is from one abstract [pdf] that studied the texture differences found fourteen boulders on Bennu. The arrows point to the contacts between the different textures, suggesting the existence of layers. Such layers could not have been created on Bennu. Instead, these rocks must have formed on a parent body large enough and existing long enough for such geological processes to take place. At some point that parent body was hit, flinging debris into space that eventually reassembled into the rubble pile of boulders that is Bennu.

Other abstracts from scientists from both the Hayabusa-2 mission to Ryugu and the OSIRIS-REx mission to Bennu covered a whole range of topics:
» Read more

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Monday at the non-existent Lunar & Planetary Science Conference

1:08 pm

Today I had planned on attending the first day of the 51st annual Lunar & Planetary Science Conference in the suburbs of Houston, Texas. Sadly, for the generally foolish and panicky reasons that is gripping America these days, the people in charge, all scientists, decided to cancel out of fear of a virus that so far appears generally only slightly more dangerous than the flu, though affecting far far far fewer people.

Anyway, below are some of the interesting tidbits that I have gleaned from the abstracts posted for each of Monday’s planned presentations. Unfortunately, because I am not in the room with these scientists, I cannot get my questions answered quickly, or at all. My readers must therefore be satisfied with a somewhat superficial description.
» Read more

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China on track for Mars launch in July?

2:44 pm

Two stories today, one from Nature and the second from space.com, pushed the idea that China’s Mars orbiter/lander/rover mission is still on schedule to meet the July launch window.

A close read of both stories however revealed very little information to support that idea.

The Nature article provided some details about how the project is working around travel restrictions put in place because of the COVID-19 virus epidemic. For example, it told a story about how employees drove six scientific instruments by car to the assembly point rather than fly or take a train, thereby avoiding crowds.

What struck me however was that this supposedly occurred “several days ago,” and involved six science payloads that had not yet been installed on the spacecraft. To be installing such instrumentation at this date, only four months from launch, does not inspire confidence. It leaves them almost no time for thermal and vibration testing of the spacecraft.

The article also provided little information about the status of the entire project.

The space.com article was similar. Lots of information about how China’s space program is dealing with the epidemic, but little concrete information about the mission itself, noting “the lack of official comment on the mission.” Even more puzzling was the statement in this article that the rover “underwent its space environment testing in late January.”

I wonder how that is possible if those six instruments above had not yet been installed. Maybe the instruments were for the lander or orbiter, but if so that means the entire package is not yet assembled and has not been thoroughly tested as a unit. Very worrisome.

Posting today has been light because I was up most of the night dealing with a family health issue, meaning that I ended up sleeping for several hours during the day. All is well, nothing serious (it is NOT coronavirus), but it has left my brain and schedule very confused. Will likely take a good night’s sleep to get back to normal.

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Black dunes and weird hills on Mars

1:41 pm

Black dunes and weird hills on Mars
Click for full image.

Cool image time! Or I should say a bunch of cool images! The photo on the right, rotated, cropped, reduced, and annotated by me, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on February 3, 2020. An uncaptioned image, it was entitled “Arabia Terra with Stair-Stepped Hills and Dark Dunes.” Arabia Terra is one of the largest regions of the transition zone on Mars between the northern lowland plains and the southern cratered highlands. It is also where Opportunity landed, and where Europe’s Rosalind Franklin rover will land, in 2022.

This image has so many weird and strange features, I decided to show them all, Below are the three areas indicated by the white boxes, at full resolution. One shows the black dunes, almost certainly made up of sand ground from volcanic ash spewed from a long ago volcanic eruption on Mars.
» Read more

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Sunspot update: The flatline resumes

12:17 pm

NOAA this week released its February update of its monthly graph showing the long term sunspot activity of the Sun. Below is my monthly version, annotated as I have done every month since 2011.

After a tiny uptick in sunspot activity in January, the Sun resumed the unprecedented flatlining of sunspot activity that began last June. Since then, the Sun has produced practically no sunspots, a drought that as far as I can tell has never happened since the 11-year sunspot cycle resumed in the 1700s (after the grand minimum in the 1600s) and astronomers began counting sunspots.

February 2020 sunspot activity
The graph above has been modified to show the predictions of the solar science community for the previous solar maximum. The green curves show the community’s two original predictions from April 2007, with half the scientists predicting a very strong maximum and half predicting a weak one. The red curve is their revised May 2009 prediction, extended in November 2018 four years into the future.

February saw only one sunspot, and it belonged to the old solar cycle. It also occurred at the beginning of the month, and was followed by 33-day streak of blankness, into the middle of March, when a sunspot from the new cycle appeared and quickly faded.

The continuing overall lack of sunspots, from either the old or new cycle, does not mean that we are entering a new grand minimum, with no sunspots for decades (though some scientists believe we are). It does suggest however that the next solar maximum will be weak, and very likely weaker than the very weak maximum that just ended.

Why the Sun does this remains a mystery. Scientists really have no fundamental understanding of the magnetic processes that produce the Sun’s sunspot cycles. And since that cycle appears to have some effect on the Earth’s climate, it also means scientists do not yet have a fundamental understanding of the climate either.

Not that this lack of knowledge matters anymore. We are in an age of panic and certainty, based on emotion and feelings. All that matters is that many people feel they understand the climate and how the Sun works, just as everyone is sure that COVID-19 will destroy the world if we don’t shut down all human activity.

They are certain, and any additional data that illustrates that certainty is unwarranted is irrelevant and must be ignored.

Certainty however is a very dangerous thing. The universe is always more complicated than we know, and to assume we now understand all without doubt leaves us very vulnerable to some bad surprises, as well as the chance we will take actions that are foolish, inappropriate, and even downright evil.

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An exoplanet where it rains iron

10:12 am

Astronomers have discovered an exoplanet 640 light years away hot enough for iron to be vapor in the atmosphere and to condense out as rain.

The high-resolution spectrum reveals lots of iron vapor within the sliver of atmosphere undergoing the transition from day to night. However, this iron vapor signature is missing from the sliver of atmosphere transitioning from night to day. The astronomers think this happens because strong winds push iron vapor to the nightside, where it cools and condenses into clouds.

“This planet has a twilight zone at a temperature close to the iron condensation temperature,” Ehrenreich explains, “so the change in atmospheric composition (with iron vs. without iron) is occurring right where we are able to observe.”

Because the planet is a gas giant, there’s no surface onto which the droplets can fall, says coauthor Nuno Santos (University of Porto, Portugal). But the planet’s gravity likely pulls the clouds downward, enveloping the nightside in iron fog. The global winds then push the clouds and fog onto the dayside, where the vaporization-condensation cycle repeats again.

Very exotic, and alien, and I guarantee it is probably far more alien than we so far can guess.

You can find out more in this second more detailed article.

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ExoMars2020 rover delayed until 2022

9:43 am

The European Space Agency (ESA) today announced that they are delaying the launch of their ExoMars2020 rover mission until the next launch window in 2022

The press release says this will give them the time “necessary to make all components of the spacecraft fit for the Mars adventure.” Considering that the spacecraft’s parachutes have yet to have a successful high altitude test, that the entire spacecraft is not yet assembled, and that when they did the first thermal test of the rover the glue for the solar panel hinges failed, this seems that they need to do a lot of testing.

Overall the decision is smart. Better to give them the time to get this right then launch on time and have a failure.

At the same time, there appears to be something fundamentally wrong within the management of this project at ESA. This project was first proposed in 2001, and has gone through repeated restructurings and redesigns. Moreover, they began planning the rover for this 2020 launch in 2011, and after ten years were not ready for launch.

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Martian dust devil tracks come and go

1:40 pm

The changing surface of dunes on Mars
Click for full image.

Earlier image of the same dunes
Click for full image.

Cool image time! To understand what created the vastly strange and alien Martian surface, it will be necessary for scientists to monitor that surface closely for decades, if not centuries. To the right is one small example. Taken by the high resolution camera of Mars Reconnaissance Orbiter (MRO) and rotated, cropped, and reduced to post here, it shows a dune field inside a crater in the southern cratered highlands of Mars. Craters have been found to be great traps for dust and sand on Mars. Once the material is blown inside, the winds are not strong enough to lift the material out above the surrounding rims. Thus you often get giant dunes inside craters, as we see here.

What makes this location of interest to planetary scientists is the changing surface of these dunes. They have been monitoring the location since 2009. In 2013, the MRO science team released a captioned photograph, the second image to the right, also rotated, cropped, and reduced by me to match the same area in the top image. In that caption planetary scientist Corwin Atwood-Stone of the Lunar and Planetary Laboratory in Arizona wrote,

This area was previously imaged in August 2009, about two Mars years ago, and in that image dust devil tracks were also visible. However the tracks visible now are completely different from the earlier ones. This tells us that there has been at least one dust storm since then to erase the old tracks, and lots of dust devil activity to create the new ones.

Since then the MRO science team has taken repeated images of this location to monitor how the dust devil tracks change, as well as monitor possible changes to the dunes themselves, including avalanches. The newest image above shows the result of the global dust storm last year. It wiped out the dust devil tracks entirely.

The newer image was entitled, “Monitor Dune Avalanche Slopes,” but I couldn’t find any examples. Based on published research, I am sure there is something there, even if I couldn’t find them. Maybe my readers have a better eye than I.

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Astronomers more precisely estimate the diameter of neutron stars

10:53 am

Using several different techniques, astronomers now estimate that the typical neutron star will have a diameter of 11 kilometers, or about 7 miles.

What is significant about this new estimate is that if that neutron star happens to be orbiting a black hole and get pulled into it, it will be swallowed whole instead of being ripped apart.

Their results, which appeared in Nature Astronomy today, are more stringent by a factor of two than previous limits and show that a typical neutron star has a radius close to 11 kilometers. They also find that neutron stars merging with black holes are in most cases likely to be swallowed whole, unless the black hole is small and/or rapidly rotating. This means that while such mergers might be observable as gravitational-wave sources, they would be invisible in the electromagnetic spectrum.

In other words, such cataclysmic events would be largely invisible to observers.

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China completes remote communications test of Mars rover

9:07 am

The new colonial movement: Though the report today in China’s state-run press is remarkably vague and lacking in details, it appears that they have successfully completed a remote communications test between their planned Mars rover and their ground control center.

The report also said that this will be the “only” such test before the summer launch of their orbiter/lander/rover to Mars.

China has been exceedingly closed-mouthed about this Mars project. Except for one landing test (which I found far from impressive), they have provided very little information about their progress.
While this does not mean they are having problems, it also does not engender confidence, especially because the launch window is only about four months away.

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