Tag: science

Solar Orbiter takes closest image of Sun so far

10:18 am

Solar Orbiter's closest image of the Sun, so far
Click for full interactive image, where you can zoom in, a lot.

Cool image time! The European Space Agency (ESA) yesterday released several new images from its Solar Orbiter probe, taken when the spacecraft made its most recent closest approach of the Sun.

One of the images, taken by the Extreme Ultraviolet Imager (EUI) is the highest resolution image of the Sun’s full disc and outer atmosphere, the corona, ever taken.

Another image, taken by the Spectral Imaging of the Coronal Environment (SPICE) instrument represents the first full Sun image of its kind in 50 years, and by far the best one, taken at the Lyman-beta wavelength of ultraviolet light that is emitted by hydrogen gas.

The images were taken when Solar Orbiter was at a distance of roughly 75 million kilometres, half way between our world and its parent star. The high-resolution telescope of EUI takes pictures of such high spatial resolution that, at that close distance, a mosaic of 25 individual images is needed to cover the entire Sun. Taken one after the other, the full image was captured over a period of more than four hours because each tile takes about 10 minutes, including the time for the spacecraft to point from one segment to the next.

The photo to the right, reduced to post here, is the EUI photo.

Solar Orbiter has been in its science orbit since November, though that orbit over time will slowly be adjusted to swing the spacecraft into a higher inclination so that it can make the first close-up observations of the Sun’s polar regions. It is also working in tandem with the Parker Solar Probe, which observes the Sun from even closer distances using different instruments.

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Ingenuity completes 23rd flight on Mars

11:05 pm

Overview map
Click for interactive map.

JPL announced tonight in a tweet that Ingenuity today completed its 23rd successful flight on Mars.

23 flights and counting! #MarsHelicopter successfully completed its 23rd excursion. It flew for 129.1 seconds over 358 meters [1,175 feet].

The overview map to the right was taken from the “Where is Perseverance?” webpage and annotated by me to show the planned future routes of both Perseverance and Ingenuity. The white dotted line shows Perseverance’s path, now having almost circled the rough ground on its way to the delta and Three Forks. The tan dotted line indicates Perseverance’s future route. The dashed pink and green lines indicate two possible future flight paths for Ingenuity.

The green dot marks the position the science team marked on the map for where Ingenuity landed after today’s flight. They have not yet calculated the actual flight path, which is why it is shown by the tan dashed line. This also means there is as yet some uncertainty about this landing spot.

Originally, the plan had been to get to this spot in one flight. For reasons not yet explained, when the helicopter took off on its 22nd flight during the March 19-20th weekend, it stopped after only about 100 feet. Today’s flight apparently completed the plan, putting the helicopter where it was supposed to be.

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Today’s blacklisted American: Forbes terminates journalist for documenting Fauci’s salary

12:51 pm

Adam Andrzejewski, journalist banned for doing good journalism
Adam Andrzejewski, journalist banned for doing good
journalism

The new dark age of silencing: Adam Andrzejewski, a long time journalist for Forbes magazine, was fired when the magazine was pressured by NIH to stop him from documenting accurately the large income that Anthony Fauci and his wife derived from their government jobs.

As Andrzejewski concludes in outlining his blackballing by Forbes:

Two directors, two bureau chiefs, and two top PR officers [from NIH] didn’t send an email to the Forbes’ chief on a Sunday morning because they wanted to correct the record about Fauci’s travel reimbursements. They sent that email to subliminally send a message: We don’t like Andrzejewski’s oversight work, and we want you to do something about it.

Unfortunately, Forbes folded quickly. Within 24 hours of the NIH email to Randall Lane, my regular Forbes editor called and announced new rules. Forbes barred me from writing about Fauci and mandated pre-approval for all future topics.

Then, Forbes went silent and terminated my column roughly 10 days later on January 28.

On the day Forbes cancelled me, the editors bent the knee. A new piece on Fauci published: “Fauci’s Portrait Will Soon Hang In The Smithsonian.”

The shameful part of this story was the way a news organization took the side of government agents, rather than their own journalist. The press is not supposed to be a state-run organization, but a free press intent on uncovering government malfeasance. The people who run Forbes apparently don’t understand this, and are quite willing to become panting toadies to the federal government.

Andrzejewski however understands his role as a journalist far better. In 2011 he founded Open The Books, a non-profit focused on documenting government spending precisely, at all levels from the smallest school district to the largest agency in the federal government. To do this the organization has filed almost 50,000 Freedom of Information requests. As he noted at the link above,
» Read more

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Update on the lie that was COVID

4:12 pm

How governments determined policy against COVID
How our governments determined policy against COVID during
the past two years.

Now that the crisis of the day has shifted to the Ukraine War, bringing with it new demands by our so-called rulers to once again panic in order to begin a world war, it pays to look back at the last fake panic, what I like to call the lie that was COVID.

Below are a only few examples of the never-ending new stories daily that illustrate starkly the foolishness and the over-reaction to COVID. Take some time to read them all.

First, was COVID the deadly disease that could kill you, as claimed by our academic and political leaders? In a word, no. The two stories below simply show its harmlessness to children, something that was obvious almost from the beginning of the panic.

In the past two years anyone with any interest in the truth could have easily found and read similar stories. The threat was routinely exaggerated, sometimes to the point of faking data. These two stories are merely the tip of the iceberg. If I wanted I could add twenty, thirty, fifty more and still not list them all.

Both of these stories however illustrate the evil of the next two:

The New York petty tyrant in the first story is not alone. Democratic Party politicians nationwide, from President Joe Biden down to local school boards, have repeatedly shown themselves obsessed with putting masks on little kids, sometimes even by physical and vicious force.

As for the second story, note that it occurred two days ago in Chicago, the first day that Chicago schools had shifted to a “mask-optional” policy. Yet the teacher smacked a mask of the toddler, who ended up coming home crying. His father’s reaction:
» Read more

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Ingenuity completes 22nd flight; Perseverance on a roll

11:37 am

Overview map
Click for interactive map.

According to a tweet from JPL on March 21, 2021, Ingenuity successfully completed its 22nd flight on Mars during the March 19-20th weekend, flying for 101 seconds at a height of about 30 feet.

The tweet provided no other information, other than another flight might occur as early as later this week.

However, the most recent map update from the rover/helicopter science teams, shown to the right and annotated to post here, tells us what happened. The white dotted line indicates Perseverance’s travels. The tan dotted line indicated the flight path and landing spots for Ingenuity. The dashed tan lines indicate the planned routes for both. The red dot marks Perseverance’s present location. The green dot marks Ingenuity’s location, after its 22nd flight.

The announced flight plan for Ingenuity’s 22nd flight is shown by the two blue dots, heading north and then making a sharp left before landing. Apparently, the helicopter either did not complete that plan, landing earlier for some reason, or the flight team had decided before takeoff to shorten the flight plan significantly.

What we do know is that the helicopter landed safely, from images downloaded on March 20th [sol 384] and from the JPL tweet. The next flight, targeting later this week, could attempt to complete the previous flight plan, or instead continue to break it up into small sections.

Meanwhile, Perseverance has been racing across the Martian surface, traveling almost as much in the past week as it had for the past year. (See the map from March 16th to compare.) Moreover, the Perseverance team shortened its planned route, cutting to the west of that large crater rather than skirting it to the east. The route taken was probably slightly rougher, but nothing the rover couldn’t handle, and it saved travel time. Apparently, the scientists running the rover are now very eager to finally get to the delta, the mission’s primary geological target.

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The unbelievably rough and wind-swept surface of Mars’ Greenheugh pediment

11:17 am

Gator-back terrain on Mars
Click for full image.

Since my last update on the travels of the Mars rover Curiosity on February 22, 2022, the rover has been been creeping ever so slowly westward across a plateau that scientists have dubbed the Greenheugh pediment.

Scientists have known for years that the surface of the pediment was going to be rough going. This panorama taken by Curiosity when it first climbed up to the pediment in March 2020 to take a peek before retreating revealed that roughness starkly.

In truth, since beginning its traverse of that pediment in February, the Curiosity team has found the ground not only as rough as expected, but beautiful in a strange sort of way, as illustrated by the March 20, 2022 photo to the right, reduced to post here. As Lauren Edgar, Planetary Geologist at USGS Astrogeology Science Center, noted yesterday in a Curiosity update that featured this image:
» Read more

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NASA: Europa Clipper’s cost rise; Mars sample return delayed

10:10 am

At a meeting this week NASA officials admitted that the cost of its Europa Clipper mission has risen by three quarters of a billion dollars, and that the sample return mission to bring back Perseverance’s core samples will be delayed, as well as now require two landers, not one.

NASA revealed significant changes to two of its flagship planetary science missions at today’s Space Science Week meeting at the National Academies of Sciences, Engineering and Medicine. The cost for Europa Clipper, which will gather data as it makes multiple swingbys of Jupiter’s moon Europa, has grown from $4.25 billion to $5 billion. Separately, NASA and ESA are replanning the Mars Sample Return mission. Two landers are needed instead of one to retrieve samples from the surface of Mars and boost them into orbit for their trip back to Earth. The launches will be in 2028 instead of 2026.

The sample return mission itself is also growing in complexity:

A Sample Fetch Rover will be sent to collect them and take them to a Mars Ascent Vehicle — a rocket — that will shoot them into Martian orbit where they will be transferred to an Earth Return Orbiter for the trip back to Earth.

Initially the plan was for the fetch rover and ascent vehicle to be launched together in 2026, and the Earth Return Orbiter in 2027. But Zurbuchen decided to convene an Independent Review Board in 2020 to get an impartial assessment of the plan by outside experts. The Board cautioned that 2026 was “not achieveable” with 2028 a more realistic date, and that the “program’s schedule and cost are not aligned with its scope.”

Consequently, NASA now has replanned the mission with two landers — one each for the fetch rover and ascent vehicle — instead of one. Both landers will launch in 2028. The Earth Return Orbiter will still launch in 2027. The samples will get back to Earth in 2033.

Prediction: The launch of this fleet of sample return spacecraft will be further delayed, and its overall cost will rise, by a lot. In fact, it is very possible that SpaceX’s Starship will have already returned samples from Mars before NASA’s mission gets off the ground.

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Scientists: Enceladus’ tiger stripes come from underground ocean

9:58 am

The uncertainty of science: Using a new computer model, scientists now think they have shown how on the Saturn moon Enceladus pressure from an underground ocean can push through cracks to produce geysers on the surface.

Rudolph and his colleagues ran a physics-based model to map the conditions that could allow the cracks from the surface to reach the ocean and cause the eruptions. The model accounts for cycles of warming and cooling that last on the scale of a hundred million years, associated with changes in Enceladus’ orbit around Saturn. During each cycle, the ice shell undergoes a period of thinning and a period of thickening. The thickening happens through freezing at the base of the ice shell, which grows downward like the ice on a lake, Rudolph said.

The pressure exerted by this downward-expanding ice on the ocean below is one possible mechanism researchers have proposed to explain Enceladus’ geysers. As the outer ice shell cools and thickens, pressure increases on the ocean underneath because ice has more volume than water. The increasing pressure also generates stress in the ice, which could become pathways for fluid to reach the surface 20-30 kilometers away.

You can read the paper here.

Be warned: This is only a model. Moreover, its conclusions suggest that this mechanism will not work on Jupiter’s moon Europa, which has many planet-wide crack-like features that suggest (as yet unconfirmed) a bubbling up from below.

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Sharpest radio image ever taken of newly discovered space object

9:11 am

The first known Odd Radio Circle (ORC)
Click for full image.

The uncertainty of science: Astronomers, using the MeerKat radio telescope in South Africa, have taken the best radio image yet of a newly discovered type of astronomical object, dubbed whimsically as an odd radio circle (ORC).

The photo to the right is that image. While it is reminiscent of the many planetary nebulae seen in visible light that astronomers have been studying since the 1800s, this weird shape is only seen in radio frequencies, and it is much much larger.

Odd radio circles are so named because they’re large, circular objects which are bright around the edges at radio wavelengths, but which can’t be seen with optical, infrared or X-ray telescopes – and at this stage, astronomers don’t really know what they are.

And they’re massive – about a million light years across, making them sixteen times larger than our own galaxy. But despite their gargantuan size, the objects are difficult to spot, hiding in plain sight.

Planetary nebulae are generally the size of solar systems.

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The journey so far of China’s Zhurong Mars rover

11:07 am

Zhurong's journey on Mars, as seen by MRO
Click for full image.

Elevation map and wider overview
Click for full image.

Cool image time! The science team for the high resolution camera on Mars Reconnaissance Orbiter (MRO) today released a new orbital photo that shows the entire journey on Mars of China’s Zhurong rover, since it landed in May 2021. That image, reduced to post here, is to the right. From the caption, written by Alfred McEwen of the Lunar & Planetary Laboratory in Arizona:

This HiRISE image, acquired on 11 March 2022, shows how far the rover has traveled in the 10 months since it landed.

In fact, its exact path can be traced from the wheel tracks left on the surface. It has traveled south for roughly 1.5 kilometers (about 1 mile). This cutout highlights the rover and the rover’s path (with contrast enhanced to better reveal the tracks).

The white curves that the rover has apparently been inspecting as it moved south are called megaripples, mid-size sand dunes from three to six feet in height that are generally found to be inactive, though not always. From a recent report about Zhurong’s findings:

“The examples Zhurong has visited appear very bright-toned in satellite images taken from orbit, and the team thinks that this is because the megaripples are covered with a layer of very fine dust,” says Matt Balme at the Open University, UK, who wasn’t involved in the analysis. “This means these features are probably currently inactive, as any present-day windblown sand would tend to remove the dust.”

That report used data from the rover’s first sixty days on Mars, after it had passed its first megaripple and had just reached the parachute and backshell. It does not include any later data in the past eight months, as Zhurong rolled past another nine megaripples and several small craters.

It also doesn’t include any data obtained as the rover skirted the wide apron that surrounds the large depression in the lower left. That depression looks like a crater at first glance, but because it appears to be on top of a mound it could instead by an old pitted cone. There are a lot of these cones in this region of the northern lowland plains of Mars, and planetary scientists really want to know whether they were formed from erupting ice, lava, or mud.

The Chinese have so far not released any data on what they have found in these later travels. We shall have to wait for further published papers.

The wider elevation overview map to the right, first published on August 24, 2021 and cropped and annotated to post here, shows Zhurong’s future potential geological targets to the south. The cone to the southwest as well as the nearest scarp to the south are probably the rover’s primary goals.

Though the released results have hinted that the geology here was shaped by both wind and water, direct evidence for water has not been found, or revealed by the Chinese. Zhurong has a radar sensor that could detect evidence of near surface underground ice, if it was there. As far as I know at this point, no results from that instrument have as yet been published.

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Pushback: Pilots sue CDC over Biden mask requirement on planes

12:02 pm

How the CDC determines its mask policies
How the CDC determines its mask policies

Don’t comply: Ten pilots from three different American airlines — American, Southwest, and JetBlue — have now sued the CDC over the Biden administrations mask mandate requiring everyone to wear masks on airplanes.

A group of commercial airline pilots filed a lawsuit against the Centers for Disease Control and Prevention (CDC) in an attempt to lift the federal transportation mask mandate.

In court paperwork, the 10 commercial airline pilots – who work for American JetBlue and Southwest – argued that the CDC issued an order “Requirement for Persons to Wear Masks While on Conveyances & at Transportation Hubs” on Feb. 1, 2020 “without providing public notice or soliciting comment.”

The pilots are asking the court to “vacate worldwide the FTMM (federal transportation mask mandate)” calling the move an “illegal and unconstitutional exercise of executive authority.”

Biden’s edict was first imposed on February 1, 2021, shortly after he took power. It has been extended several times since, the most recent extension keeping it in force through April 18, 2022. At no time, however, has any data been put forth by the CDC demonstrating that the required masks accomplish anything, while we already have decades of data showing that the masks are useless against viruses like the Wuhan flu.

This new lawsuit is the eighteenth filed against the mandate, though it is the first filed by those who work on the planes.

The pilots claim above that the CDC did not follow federal law when it imposed the mandate is almost certainly correct. » Read more

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Alignment of segments in Webb’s primary mirror completed

3:06 pm

Alignment image
Click for full image.

Astronomers and engineers have now successfully completed the alignment of the eighteen segments in the primary mirror of the James Webb Space Telescope.

On March 11, the Webb team completed the stage of alignment known as “fine phasing.” At this key stage in the commissioning of Webb’s Optical Telescope Element, every optical parameter that has been checked and tested is performing at, or above, expectations. The team also found no critical issues and no measurable contamination or blockages to Webb’s optical path. The observatory is able to successfully gather light from distant objects and deliver it to its instruments without issue.

The picture to the right shows that alignment, focused on a single star. As noted in the caption:

While the purpose of this image was to focus on the bright star at the center for alignment evaluation, Webb’s optics and NIRCam are so sensitive that the galaxies and stars seen in the background show up.

After many years delay and an ungodly budget overrun, thank goodness Webb appears to be working better than expected.

It will still be several months before actual science observations begin. Further more precise alignment adjustments need to be done for all its instruments and mirrors.

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Solar scientist Eugene Parker passes away at 94

2:53 pm

R.I.P. Solar scientist Eugene Parker, whose research revolutionized solar science in the 20th century and for which the Parker Solar Probe was named, has passed away at the age 94.

As a young professor at the University of Chicago in the mid-1950s, Parker developed a mathematical theory that predicted the solar wind, the constant outflow of solar material from the Sun. Throughout his career, Parker revolutionized the field time and again, advancing ideas that addressed the fundamental questions about the workings of our Sun and stars throughout the universe.

Parker belonged to the past generations of scientists who followed the principles of the Enlightenment and believed that science was fundamentally the search for truth. He understood he could always be wrong, which brought a certain muscular strength to any ideas he proposed. He could not be lazy in any way, or his work would fail. Instead, it shone, and made what little we know of the Sun today possible.

Sadly, such men are one-by-one going from us. I wonder if the new generations will understand his mindset.

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Recent avalanche on Mars

12:06 pm

Close-up comparison of slump
Click for full image.

Wide view comparison of slump
For full images go here and here.

Cool image time! Today the science team for the high resolution camera on Mars Reconnaissance Orbiter (MRO) released images showing a very recent avalanche, or slumping, on the interior slopes of what looks like a small three-mile-wide crater inside the easternmost reaches of the giant canyon Valles Marineris.

The comparison above, reduced and rotated to post here, is their close-up showing the change, which occurred sometime between March 2021 and February 2022. The wider comparison on the right, cropped, reduced, and annotated by me, shows a wider view to help place this slumping in the context of the crater.

Calling this an avalanche is not really accurate, as it isn’t really the fall of boulders and rocks, but the quick slumping downward of an entire section of what looks like dust or sand. As Alfred McEwen of the Lunar & Planetary Laboratory in Arizona writes in the caption:
» Read more

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NASA extends Ingenuity’s mission through September ’22

9:31 am

Overview map
Click for interactive map.

NASA yesterday officially extended Ingenuity’s flight operations on Mars at least through September 2022, outlining in detail the helicopter’s hoped-for flight targets.

The map to the right shows the helicopter’s present location with the green dot, with its two possible future routes proceeding from this location indicated by dashed lines. The red dot indicates Perseverance’s present location, with its planned route from this spot indicated by the dashed lines.

Scheduled for no earlier than March 19, Ingenuity’s next flight will be a complex journey, about 1,150 feet (350 meters) in length, that includes a sharp bend in its course to avoid a large hill. After that, the team will determine whether two or three more flights will be required to complete the crossing of northwest Séítah.

Once Ingenuity crosses the rough terrain and reaches the delta, it will then be used to do more route scouting for the rover.

Upon reaching the delta, Ingenuity’s first orders will be to help determine which of two dry river channels Perseverance should take when it’s time to climb to the top of the delta. Along with routing assistance, data provided by the helicopter will help the Perseverance team assess potential science targets. Ingenuity may even be called upon to image geologic features too far afield (or outside of the rover’s traversable zone), or perhaps scout landing zones and caching sites for the Mars Sample Return program.

This ambitious plan exists because both the helicopter and its engineering team have far exceeded expectations. At the moment, there is no obvious reason why Ingenuity cannot continue to operate for years, an expectation that no one predicted.

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Mark Vande Hei sets new record for longest American space flight

10:03 am

Mark Vande Hei today set a new record for the longest American space flight, exceeding the 340 days flown by Scott Kelly on ISS in 2012-2013.

Since Vande Hei is scheduled to return to Earth on March 30th, his total record flight time should end up being 355 days, just short of a full year.

Vande Hei arrived at the space station aboard a Russian Soyuz spacecraft on April 9, 2021, knowing at the time that he would be there for at least for the five to six months that is typical today for expedition crew members. His mission was extended by NASA in September to allow for a Russian movie crew to visit the orbiting complex and, more importantly, protect against a crew rotation schedule that could leave the station without any Americans on board.

Vande Hei’s record will be the fifth longest, behind four other Russians on Mir. Musa Manarov and Vladimir Titov were the first to complete a year long flight in 1987-1988. Valery Polyakov holds the record for the longest flight, 437 days in 1994-1995. Sergei Avdeyev’s flight of 381 days on Mir in 1998-1999 is the second longest.

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Mesa in the Martian northern lowlands

3:21 pm

Mesa in the dry northern lowlands
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken on February 2, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO) and shows a mesa sticking up on the relatively flat and featureless northern lowland plains in Utopia Planitia, the second largest impact basin on Mars.

The full image shows three such mesas. Though pictures taken in the northern lowlands of Utopia tend to show evidence of buried ice or glaciers, the impression I get from this picture is one of dryness. If there is any ice here, it is below ground. And even that seems unlikely. The surface surrounding nearby craters does not have that squishy and slushy look that is seen in the north when an impact occurred on near surface ice. Instead, the ground looks solid.

The overview map below reinforces this impression.
» Read more

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Supernova discovered in Cartwheel galaxy

8:54 am

Cartwheel Galaxy, before and after supernova
Click for full image.

Cool image time! In reviewing a December 2021 image of the Cartwheel Galaxy taken by the New Technology Telescope in Chile, astronomers noticed something that was not there in earlier images, a new supernovae.

The photo above, reduced to post here, compares a 2014 image, taken by the Very Large Telescope, with the 2021 photo. In the lower left of the new image is a bright object not in the previous photo.

This event, called SN2021afdx, is a type II supernova, which occurs when a massive star reaches the end of its evolution. Supernovae can cause a star to shine brighter than its entire host galaxy and can be visible to observers for months, or even years — a blink of an eye on astronomical timescales. Supernovae are one of the reasons astronomers say we are all made of stardust: they sprinkle the surrounding space with heavy elements forged by the progenitor star, which may end up being part of later generations of stars, the planets around them and life that may exist in those planets.

Cartwheel is about 500 million light years away, and because of its bright outer ring is one one of the more unusual nearby galaxies.

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Ingenuity completes 21st flight on Mars

3:54 pm

Overview map
Click for interactive map.

According to a tweet today from JPL, the Mars helicopter Ingenuity has successfully completed its 21st flight on Mars, traveling 1,214 feet in two minutes and nine seconds at an average speed of 12.6 feet per second.

The red dot on the map to the right shows Perseverance’s location as of today. The green dot indicates Ingenuity’s position before the 21st flight. Since neither the Perseverance nor the helicopter teams have posted any updates describing the 21st flight, it is difficult to indicate a precise location for its landing site. All we know is that the helicopter is supposed to fly to the northwest, cutting across the rougher region while the rover follows the tan dotted line around that rough region, with both targeting the delta to the northwest.

As a guess, I have placed a black dot about 1,200 feet to the northwest.

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More thumbprints on Mars!

1:22 pm

Thumbprints on Mars
Click for full image.

Cool image time! Among the many strange and unexplained geological features that scientists have identified on Mars, the thumbprint feature is one of the most intriguing. The photo to the right, cropped and reduced to post here, is a fine example, and was taken on September 10, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

The thumbprints are the lighter splotches, and are generally found near curved ridges located mostly in Martian lowlands. All appear to have crater-like features in them, though these craters are not impact craters, but likely (though not confirmed) caused by some form of underground eruption, be it mud, ice, lava or something else. Though scientists do not yet really understand the process that formed the thumbprints, the data strongly suggests that they formed in connection with glacial events. From this 2003 paper [pdf]:

TT [thumbprint terrain] as well as the associated trough systems were formed by a glacial mechanism. [Elevation] data show that the trough systems consistently lie topographically above the TT; this implies that if they were they formed by the same glacier, the troughs must have formed before the glacier retreated and formed the TT.

The splash apron around the crater near the bottom of the photo supports the glacial theory, implying the presence here of underground ice.

Scientists have also theorized wind processes and cinder cones as explanations for these features.

These particular thumbprints are located, as shown in the overview map below, in the same general area as a previous cool image of thumbprints, from April 2019.
» Read more

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Monitoring one glacier flowing off a mesa in Mars’ glacier country

1:28 pm

Vicous glacial flow on Mars
Click for full image.

Today’s cool image takes us back to the mesa in Mars’ glacier country that first clued me in on the prevalence of ice in the Martian mid-latitudes. The photo to the right, rotated, cropped, and reduced to post here, was taken on November 13, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO), and shows a viscous flow coming down from a hollow on that mesa’s southern wall.

The new image has likely been taken to see if anything has changed since the previous image was taken in 2014. Based on the resolution published at the MRO website, nothing seems to have changed, though with more sophisticated software higher resolution versions of the images are available that might show some changes.

In my first post about Mars’ glacier country in December 2019, this flow was one of four that I featured coming off this same 30-mile wide mesa, as shown by the first overview map below.
» Read more

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Fractured terrain on Mars

1:39 pm

Fractures on Mars
Click for full image.

Today’s cool image, which at first glance does not seem so puzzling, actually falls into my “What the heck?” category of baffling Martian geology. The picture to the right, cropped and reduced to post here, was taken on January 15, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Labeled “Avernus Cavi fractures”, it shows what resembles the well-documented chaos terrain seen in many places on Mars, where erosion over eons along fault lines creates mesas with random criss-crossing canyons.

The problem is that this location is practically on the Martian equator, and chaos terrain tends to be found in the mid-latitude bands where there are many glaciers, suggesting the cyclical waxing and waning of those glaciers is what causes the erosion. Here at the Martian equator the terrain is very dry. No glaciers.

Moreover, note the higher mesa near the top center. Its flat top suggests that once this terrain was covered with an even higher layer of material, almost all of which was stripped away evenly everywhere, except where that mesa sits. As an amateur geologist I can’t think of any sequence of events that would do such a thing. I suspect professionals might have problems themselves.

Then there are the small parallel ridges. They suggest dunes, especially inside the depressions where sand and dust can get trapped. On the mesa tops however these ridges are more mysterious. Why for example are they aligned with the small ridge in some hollows, but not others? They in many ways remind me of the ridges in this earlier “What the heck?” cool image, also right on the equator.

The overview map below provides some help, though not much.
» Read more

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The layered Martian history exposed in Valles Marineris

12:28 pm

Overview map

The layers in Valles Marineris
Click for full image.

Cool image time! Like the Grand Canyon in the United States, Mars’ largest canyon, Valles Marineris, appears to have been carved out of a layered terrain, thus exposing those many layers in the walls of the canyon.

Valles Marineris, however, is much much larger than the Grand Canyon. You could fit dozens of Grand Canyons inside it and hardly fill it. Yet, its walls have the same layered look, suggesting that in Mars’ long geological history, first came many events that laid down new layers time after time, followed by a long period when the laying ceased and other events carved out the canyon to its almost 30,000 foot depth (which by the way is also about six times deeper than the Grand Canyon).

Today’s cool image to the right, cropped and reduced to post here, was taken on September 5, 2021 and shows a terraced terrain on the floor of Candor Chasma, one small side canyon of Valles Marineris that is still much larger than the Grand Canyon. The black dot in the overview map above indicates its location. I roughly estimate the elevation difference between the high and low spots in the picture is about 3,000 feet, a difference that while two-thirds that of the depth of the Grand Canyon is almost unnoticeable within the depths of Valles Marineris.

This layering is probably the canyon’s most important geological feature. See these previous cool images here and here for other examples. When geologists finally arrive on Mars and can begin dating these layers in detail they will likely reveal the planet’s entire geological history, going back five to six billion years.

Most of the layers are probably volcanic flood lava laid down by repeated eruptions from the giant volcanoes to the west. In between and within however will be deposits from the Martian atmosphere, telling us its composition and thickness. All told, the layers of Valles Marineris will likely unlock almost all of the most basic secrets of Martian geology.

We merely have to go there to find out.

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Martian crater overwhelmed by glacier?

1:32 pm

Martian crater overwhelmed by glacier?
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on January 28, 2022 by the high resolution camera on Mars Reconnaissance Orbiter. It shows what the science team labels a “modified crater.”

What I see is an old crater almost completely covered by glacial material. That material however is also very old, as there are numerous small craters on its surface, enough that it must have been here for a long time. Its cracked surface also suggests this glacier is very old.

Thus, while we might have ice here, buried by a thin layer of dust and debris to prevent it from sublimating away, it must be very old ice. The many climate cycles caused by the extreme swings in Mars’ rotational tilt, from 11 to 60 degrees, have apparently not caused this ice to ebb and flow very much.

Might it therefore not be ice, but hardened lava?

The location, as shown by the overview map below, provides some context, but only makes this mystery more puzzling.
» Read more

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Sunspot update: The Sun rages on

10:54 am

Time for my monthly sunspot cycle update, where I take NOAA’s monthly graph showing the long term trends in the Sun’s sunspot activity, and annotate it with additional data to provide some context.

The trend of sunspot activity exceeding the predictions continued in February. While the increase in activity from January still left it less than the activity in December, the total number of sunspots is still far above the number predicted by NOAA’s panel of solar scientists in 2020, with the rise towards a solar maximum also much steeper and far faster than predicted.
» Read more

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Germany turns off its instrument on the Spektr-RG orbiting X-ray telescope

8:59 am

As part of Germany’s decision to break off all scientific cooperation with Russia in response to Russia’s Ukraine invasion, the Max Plank Institute has turned off its instrument on the Spektr-RG orbiting X-ray telescope.

Meanwhile, Roscosmos’ head, Dmitry Rogozin revealed he will demand compensation from Europe for its sanctions, including this shut down on Spektr-RG.

Europe’s sanctions cause real losses to Russia’s space corporation Roscosmos. The corporation will estimate them and demand a compensation from partners in Europe, Roscosmos’s press-service told TASS on Tuesday. “They have caused harm to the Spektr-RG laboratory’s research program by turning off one of the two telescopes. Their sanctions cause real losses to us. The damage will be estimated and a bill presented to the European side,” Roscosmos said.

It now appears that all the European cooperation with Russia in space is likely dead, at least until Russia gets out of the Ukraine.

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The Democrats now prove there never was any science behind their mandates

12:21 pm

Most of all beware this boy.’
As noted by the Spirit of Christmas Present in Dickens’
The Christmas Carol, ‘This boy is ignorance, this girl is want.
Beware them both, but most of all beware this boy.’

Only months and years after most Republican Party governors and politicians had lifted or halted all mandates requiring masks or COVID shots or social distancing, in the past week Democrats in numerous places have suddenly decided that masks and COVID shots and social distancing have suddenly become unnecessary or ineffective, and have canceled almost all their government-edicts mandating such things.

Simultaneously, the CDC late last week finally loosened its mask recommendations, no longer demanding that Americans wear masks indoors or in many other circumstances.

What none of these announcements mentioned was any evidence of any new scientific results to justify the new recommendations or the loosening of mandates. These changes were based — not on new scientific results — but on the fear-based opinions of politicians and health bureaucrats who for the past two years have consistently based their edicts and mandates solely on emotions and politics, not scientific evidence, and were repeatedly wrong every single time.

That they happened to be correct now is not because they are basing their actions on any new”science”, but like a broken clock, even idiots can stumble on the truth once in awhile, by accident.

In this case however their stumbling is not entirely by accident. » Read more

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Scientists: Yutu-2 spots tiny glass globules similar to those found by Apollo astronauts

9:45 am

According to a paper just published Chinese scientists running the Yutu-2 rover on the far side of the Moon have spotted several tiny glass globules similar to those found by Apollo astronauts.

Xiao and his team believe the small spheres, which are between 0.59 and 0.79 inches (1.5 to 2.5 centimeters) across, were probably formed by relatively recent meteor impacts. Specifically, the researchers believe that the globules formed from anorthosite, a volcanically-formed rock rich in the mineral feldspar, after a high-energy impact melted the rock and reformed into spheres.

In appearance these Yutu-2 globules appear translucent, unlike the Apollo globules which were either dark or opaque. Since the rover did not do spectroscopy on these objects before moving on, however, their actual make-up is unknown, with the speculations by the researchers above merely that, speculations, though reasonable.

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Chandra’s camera remains in safe mode

12:12 pm

Though engineers have improvised a work-around that has allowed most of instruments on the Chandra X-Ray observatory to resume science operations, the power supply problem in the telescope’s high resolution camera (HRC) that occurred on February 9th remains unresolved, leaving that camera in safe mode.

The Chandra science instrument and engineering teams continue to analyze the cause of the HRC power supply issue, as well as potential approaches to enable the HRC again. The spacecraft is otherwise healthy and operating normally.

Chandra has been flying now for more than two decades, well past its original mission. For it to begin to have these problems is not surprising, though it will be a great tragedy if it fails just as the James Webb Space Telescope is about to go operational. Ideally astronomers want data from both, as well as Hubble, to cover a wide swath of the electromagnetic spectrum, from the optical to the infrared to X-rays.

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