Tag: science

A sample of typical but strange Martian northern lowland plain geology

1:24 pm

Typical lowland features on Mars
Click for full image.

Cool image time! The photo to the right, rotated, cropped and reduced to post here, was taken on April 18, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a nice sample of the typical glacial-filled craters found often in the mid-latitudes between 30 to 60 degree latitudes, surrounded by a lot of erosion features representative of these lowland northern plains.

The biggest crater is very symptomatic of what scientists have dubbed concentric crater fill, a feature that they believe reveals that there is buried ice water glaciers here, protected by a thin layer of debris. The apron of brighter material surrounding the crater could be a splash feature created during impact and now more obvious because it has been revealed as sublimation and erosion lowered the terrain nearby.

The location is north of the Cydonia region in Acidalia Planitia, several thousand miles to the northeast of the region where Viking 1 landed in 1976 and Mars Pathfinder landed in 1997, as shown in the overview map below.
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Hubble remains out of commission, with no repair date in sight

9:32 am

According to a statement to Space.com provided by the engineers trying to fix the Hubble Space Telescope, “there is no definitive timeline for bringing the computer back online.”

The Hubble operations team is working to solve the payload computer issue onboard the Hubble Space Telescope. The team is working to collect all the data available to them to isolate the problem and determine the best path forward for bringing the computer back to operations. At this time, there is no definitive timeline for bringing the computer back online. However, the team has multiple options available to them and are working to find the best solution to return the telescope to science operations as soon as possible.

…Assuming that this problem is corrected via one of the many options available to the operations team, Hubble is expected to continue yielding amazing discoveries into the late 2020s or beyond,” the operations team at NASA’s Goddard Space Flight Center in Maryland told Space.com in an email. However, “there is no definitive timeline yet as to when this will be completed, tested and brought back to operational status,

I gather from this that they do have options to might fix the problem, but they have also found the problem to be more complex than expected.

While I honestly am confident these engineers can bring the telescope back to life, we must all be prepared for the strong possibility that this might be the moment when such a repair is impossible. If so, our vision of the heavens will once again be blinded by the poor vision available to us from inside the Earth’s atmosphere. And that vision will not be cleared in the foreseeable future by an American or western optical space telescope, as none are being designed, no less built.

The Chinese however are building one, for their purposes, which will be better than Hubble and is set to launch within the next few years to fly in formation with their new space station, close by so that astronauts can do repairs if necessary.

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First attempts to fix Hubble fail

9:43 am

An attempt to switch the Hubble Space Telescope to a different backup computer module in order to bypass a broken unit failed last week, leaving the telescope in safe mode.

A payload computer on Hubble stopped working June 13, the agency said in a June 16 statement. Engineers speculated that the computer, used to manage operations of Hubble’s science instruments, malfunctioned because of a degrading memory module, putting the instruments into a safe mode.

The agency said at the time that it would switch of a backup memory module that day and, after about a day of testing, restart the instruments and resume science observations.

However, in a June 18 statement, NASA said those efforts to switch to a backup memory module failed because “the command to initiate the backup module failed to complete.” An attempt to restore the computer with both the original memory module and the backup unit also failed.

While the engineers at the Space Telescope Science Institute, that operates Hubble, have expressed confidence they can overcome these issues, the failures this week are truly troublesome. We may truly be facing the end of the telescope,

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A confused river of ice on Mars

12:39 pm

A river of ice on Mars
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on March 4, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what MRO’s science team labeled a “Landform in Source Region of Harmakhis Vallis.”

They are being very correct and careful with that label. The landform here is quite clearly reminiscent of a glacier, but because they don’t yet have confirmation of its watery nature, as good scientists they can’t call it that.

I however am a mere journalist, so I am free to speculate more wildly. Sure looks like glaciers to me, the ice flowing downhill from the left to the right and flowing around that central mound.

The overview map below gives a wider context, but also makes the behavior of the glaciers here far more puzzling.
» Read more

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Japanese scientists complete inventory of Ryugu asteroid samples

9:00 am

In a press conference yesterday the Japanese space agency JAXA announced that scientists have completed their inventory of the samples brought back from the asteroid Ryugu by the Hayabusa-2 spacecraft, and are now ready to begin distributing those samples to scientists around the world for more detailed research.

JAXA has cataloged the soil samples brought back by Hayabusa 2 last December, by size, color and shape. From now, 269 researchers from 14 countries, including Japan and the United States, will conduct an in-depth analysis of the soil’s structures and components over the course of about a year.

As expected, the inventory found the samples had a large amount of hydrogen, oxygen, and carbon atoms. Even before Hayabusa-2’s arrival, Ryugu had been catalogued as a “hydrated” asteroid, which means it was thought to contain a lot of hydrogen and oxygen, the basic elements of water. The inventory has now confirmed this.

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New data confirms lack of dark matter in one galaxy

12:00 pm

The uncertainty of science: Astronomers have strengthened their evidence that one particular nearby galaxy is completely devoid of dark matter, a situation that challenges the existing theories about dark matter which suggest it comprises the bulk of all matter in the universe.

The astronomers had made their first claim that this galaxy, NGC 1052-DF2, lacked dark matter back in 2018, a claim that was strongly disputed by others.

The claim however would only hold up if the galaxy’s distance from Earth was as far away as they then estimated, 65 million light years (not the 42 million light years estimated by others). If it were closer, as other scientists insisted, then NCC 1052-DF2 likely did have dark matter, and the theorists could sleep at night knowing that their theory about dark matter was right.

To test their claim, the astronomers used the Hubble Space Telescope to get a better, more tightly constrained estimate of the distance, and discovered the galaxy was even farther away then previously believed.

Team member Zili Shen, from Yale University, says that the new Hubble observations help them confirm that DF2 is not only farther from Earth than some astronomers suggest, but also slightly more distant than the team’s original estimates.

The new distance estimate is that DF2 is 72 million light-years as opposed to 42 million light-years, as reported by other independent teams. This places the galaxy farther than the original Hubble 2018 estimate of 65 light-years distance.

So, does this discovery invalidate the theories about dark matter? Yes and no. The theories now have to account for the existence of galaxies with no dark matter. Previously it was assumed that dark matter was to be found as blobs at the locations of all galaxies. Apparently it is not.

However, the lack of dark matter at this one galaxy does not prove that dark matter is not real. As noted by the lead astronomer in this research,

“In our 2018 paper, we suggested that if you have a galaxy without dark matter, and other similar galaxies seem to have it, that means that dark matter is actually real and it exists,” van Dokkum said. “It’s not a mirage.

Ah, the uncertainty of science. Isn’t it wonderful?

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Russia announces it is shifting its manned operations on ISS to yearlong missions

10:35 am

According to Dmitry Rogozin, head of Roscosmos, Russia is changing the standard length of a crew stay at ISS from six months to a full year, beginning with the flight in which the crew will help film a commercial movie on ISS in October.

Then-Head of the Gagarin Cosmonaut Training Center Pavel Vlasov earlier said that two members of the Soyuz MS-18 spacecraft, Pyotr Dubrov and Mark Vande Hei, would stay in orbit longer than six months to help shoot a film Vyzov (Challenge). He also said that crew commander Oleg Novitsky would return to Earth in October aboard the Soyuz MS-18’s descend capsule together with the participants of the Soyuz MS-19 spacecraft’s flight (actress Yulia Peresild and film director Klim Shipenko who would be engaged in the film). Two crewmembers, cosmonaut Dubrov and NASA astronaut Vande Hei, would remain in orbit and return to Earth aboard the Soyuz MS-19 spaceship, he said.

Gaining experience at missions a year or longer, something only the Russians have accomplished, makes sense if one plans to send astronauts to Mars. I suspect however there is a second more practical reason for this change: It will free up seats on Soyuz to sell for commercial tourist flights. Russia clearly wants to compete successfully with the new American commercial manned flights that SpaceX and Axiom will be flying. This change gives them that opportunity.

Rogozin himself likely has personal financial motives. He is a co-producer on that movie, and likely will also pocket personally some of the profits from future tourist flights.

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Astronomers propose explanation the dimming of Betelgeuse in 2020

10:01 am

The uncertainty of science: New data has allowed astronomers to propose a more detailed explanation for the dimming of Betelgeuse in 2020 by almost two-thirds.

[T]he dimming was likely to be caused by [one of two] mechanisms, such as a blob of unusually cold matter appearing on the surface of the star in what’s known as a convective cell, or a cloud of dust crossing the line of sight to it.

Now, astrophysicist Miguel Montargès at the Paris Observatory and his collaborators have found that the reason for the ‘great dimming’ was probably a combination of both of those factors

The data suggest that the star spewed out material from a convection cell, which then quickly condensed into dust which acted to block the star’s light. The growing cell itself also was darker, which also contributed to the dimming.

The results, while robust, are still uncertain. While a number of mainstream news sources are claiming the mystery of Betelgeuse’s dimming has been “solved”, that is not how it works. The data now points to an answer, but the data is far from complete, and future observations could very easily change that answer.

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New studies: Plexiglass does nothing; masks carry diseases; lockdowns destroyed 40% of all small businesses

5:11 pm

Modern science!
How modern politicians apply science!

Three new studies have once again confirmed what common sense and a hundred-plus years of medical research has consistently shown, that the measures mandated by foolish governments and health officials last year to supposedly “stop” or “slow” the spread of COVID-19 did nothing of the sort, and instead likely accomplished the exact opposite.

The studies specifically looked at three of the most popular and imposing actions mandated by either governments or corporations, the installation of plexiglass everywhere, the mandating of mask use, and the draconian lockdowns that shut down whole states for almost a year. In all three cases, the studies found them worse than useless.

First, the plexiglass barriers: Not only has there never been any research documenting the usefulness of the plexiglass barriers that restaurants, convenience stores, and almost all businesses have installed to isolate their workers and customers from each other and thus supposedly prevent the spread of COVID-19, a new study from Boston found that the plexiglass barriers likely increased the risk of infection, because it hampered the flow of air circulation.
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Hubble in safe mode due to computer problem

1:47 pm

A computer failure on June 13th put the Hubble Space Telescope in safe mode, with engineers hoping to have the problem resolved and the telescope back in operation by tomorrow.

NASA is working to resolve an issue with the payload computer on the Hubble Space Telescope. The computer halted on Sunday, June 13, shortly after 4 p.m. EDT. After analyzing the data, the Hubble operations team is investigating whether a degrading memory module led to the computer halt. The team is preparing to switch to one of several backup modules on Wednesday, June 16. The computer will then be allowed to run for approximately one day to verify that the problem has been solved. The team would then restart all science instruments and return the telescope to normal science operations.

The unit itself, while built in the 1980s, was only launched to Hubble in 2009 as part of the last shuttle repair mission.

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The Mountains of Mars

12:05 pm

The mountains of Mars
Click for full resolution. The highest mountain on the right is about 450 feet high.

Even as the rover Perseverance is beginning its first science campaign on the floor of Jezero Crater, the rover Curiosity about 3,000 miles to the east has begun its climb into the mountains of Mars that surround the central peak of Gale Crater, Mount Sharp.

The mosaic above, made from two images taken by the rover’s right navigation camera (here and here), shows what Curiosity sees ahead. Since my last update on June 4th describing Curiosity’s future travels, the rover’s science team has pushed forward directly uphill towards the entrance to the canyon Gediz Vallis, visible as the gap between the mountains to the right and left in the above mosaic.

The overview map below shows the rover’s approximate present position, with the yellow lines indicating what the above photo is looking at.
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Rocket Lab wins contract to build two Mars smallsat planetary probes

9:13 am

Capitalism in space: Rocket Lab has won a contract to build two Mars smallsat planetary probe as part of a NASA project.

The project, led by the University of California, will have two probes dubbed Blue and Gold that will launch in 2024 on a Falcon Heavy rocket. The science goal is to place two spacecraft in Mars orbit to provide a more global look at is atmosphere. The financial goal is to show that smallsats built for less can do the same job as larger probes costing millions more.

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Boxwork in the basement of Mars

12:34 pm

Polygon ridges in Hellas Basin
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, shows what resembles closely what in Earth caves are called boxwork, polygonal ridges sticking out from the bedrock and usually indicating cracks filled with harder material that resist erosion.

Taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on March 23, 2021, what makes this boxwork especially interesting is its size and location. On Earth cave boxwork generally ranges from a few inches to a few feet across. Not only do these Martian ridges range from 100 feet to a half mile in length, they are located at the lowest point in Hellas Basin, the basement of Mars. In fact, this spot is as close as you can get to Mars’ Death Valley, as shown by the overview map below.
» Read more

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China releases more images from Zhurong

12:34 pm

Zhurong looking north past its lander
Click for full image.

The new colonial movement: Three weeks after its Mars rover Zhurong rolled off its lander to begin its 90 day mission, China yesterday finally released the first high resolution images taken by the rover.

The images included a 360 degree panorama, taken while the rover was still sitting on the lander, an image of both the rover and lander taken by a mini-camera that was dropped from the bottom of the rover, a picture of some interesting nearby boulders to the east, and a picture looking past the lander looking north.

This last picture is above, reduced and annotated by me. The small flat but distinct hill to the north I think is the nearest pitted cone that could be either a mud or lava volcano. That cone is about 3.75 miles away, and though a very enticing target is probably too far away for Zhurong to reach, unless it survives for years past its planned three-month mission, as did the American rovers Spirit and Opportunity.

The closer small ridges and hills just to its right could be the east and west rims of the nearest large crater, about 650 feet wide with a distorted shape, that is visible in the high resolution orbital images taken by both Tianwen-1 and Mars Reconnaissance Orbiter (MRO). This crater is about 1,600 feet away.

Based on these images it appears that once Zhurong rolled off the lander to the east, it immediately turned to the right to move several feet south, where it turned right again to move several feet to the west until it was just to the west of the lander, where it took the picture above. During that last move it dropped the small camera behind it so that it could take the picture showing both the rover and the lander.

These maneuvers and the rover’s position south of the lander and facing west suggest they are going to head to the west, where there are some nearby smaller craters and other interesting features. Whether they eventually go north, with that pitted cone a long term goal should the rover last longer than its planned mission through the end of August, remains entirely unknown.

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Zhurong finally located on Mars

11:58 am

Zhurong as seen by MRO
Click for full image.

Though the Chinese had earlier this week released one image taken by their Mars orbiter, Tianwen-1, showing their rover Zhurong on the surface of Mars, they did not provide any specific location information.

This lack has now been filled by a new high resolution image of Zhurong taken by Mars Reconnaissance Orbiter (MRO) on June 6, 2021. This image, cropped to match the Tianwen-1 image and annotated by me to post here, shows the parachute, entry capsule, heat shield, lander, and rover. I have added white dots to distinguish the rover from the lander, which indicate that since the Tianwen-1 orbital image the rover had moved south about 70 feet, suggesting it has been able to travel on the surface.

What this MRO image provides that the Chinese refused to reveal is the latitude and longitude of that landing site, which in turn tells us that the lander put down about 14 miles to the northwest of its targeted landing spot. The mosaic of MRO context camera images below show this landing spot in context with the surrounding terrain.
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Update on Perseverance’s future travel plans

10:47 am

Perseverance's future travels
Click for full image.

The science team for the rover Perseverance yesterday released a revised map of where they intend over the next few months to send the rover on the floor of Jezero Crater.

The map to the right, cropped and reduced to post here, shows that route.

The first science campaign (depicted with yellow hash marks) begins with the rover performing an arching drive southward from its landing site to Séítah-North (Séítah-N). At that point the rover will travel west a short distance to an overlook where it can view much of the Séítah unit. The “Séítah-N Overlook” could also become an area of scientific interest – with Perseverance performing a “toe dip” into the unit to collect remote-sensing measurements of geologic targets.

Once its time at the Séítah-N Overlook is complete, Perseverance will head east, then south toward a spot where the science team can study the Crater Floor Fractured Rough in greater detail. The first core sample collected by the mission will also take place at this location. After Cratered Floor Fractured Rough, the Perseverance rover team will evaluate whether additional exploration (depicted with light-yellow hash marks) farther south – and then west – is warranted.

Whether Perseverance travels beyond the Cratered Floor Fractured Rough during this first science campaign, the rover will eventually retrace its steps. As Perseverance passes the Octavia B. Butler landing site, the first science campaign will conclude. At that point, several months of travel lay ahead as Perseverance makes its way to “Three Forks,” where the second science campaign will begin.

At that point the rover will begin studying the base of the delta of material that in the far past poured through a gap in the western rim of Jezero Crater.

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Europe to fly mission to Venus to study its volcanoes

9:32 am

The European Space Agency yesterday announced that it will fly an orbiter to Venus in 2031, dubbed EnVision, to study the estimated million volcanoes on the surface of that hellish planet.

EnVision will use an infrared spectrometer to seek out hot spots on the surface that could indicate active volcanoes. It will use radar to map the surface, looking for signs of lava flows. Ultraviolet and high-resolution infrared spectrometers will then look for water vapor and sulfur dioxide emissions, to see whether smoldering volcanoes are driving cloud chemistry today.

This data will help determine exactly geologically active Venus’s volcanoes are. Several studies in the past decade using archival data (see here, here, and here) have suggested as many as 37 of those volcanoes are active, but this data remains uncertain.

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Evidence of past underground water in the Martian equatorial regions?

2:30 pm

Mosaic of strange feature
Click here, here, here, and here for full images.

Today’s cool image, to the right, takes us to the equatorial regions of Mars, a region that today appears quite arid and dry based on all the orbital and rover/lander data so far gathered. The photo and its complex geology however provides us a hint that once liquid water did exist here. At least, that is the hypothesis that scientists presently favor, though making it fit this complex geology is not simple or straightforward.

The mosaic to the right is made from four context camera images taken by Mars Reconnaissance Orbiter (MRO). It shows a very complicated series of depressions — one of which vaguely resembles a crater — that appear to have been washed out by some past erosion process, though that process could not have been that simple because of the fissures and cracks that dominate the floor of the circular feature.

I contacted Chris Okubo of the U.S. Geological Survey, who had requested a high resolution image from MRO of a small part of this mosaic, as indicated by the white box, to ask him what we are looking at. His answer was appropriately noncommittal:
» Read more

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Ingenuity completes 7th flight on Mars

10:21 pm

Locations of Perseverance and Ingenuity on Mars
Click for interactive map.

Ingenuity yesterday successfully completed its 7th flight on Mars, heading south and landing exactly as planned.

Ingenuity lifted off around 12:34 local mean solar time on Tuesday, which corresponds to 11:54 a.m. EDT (1554 GMT). As planned, the chopper then traveled 348 feet (106 meters) south from its previous location on the floor of Mars’ Jezero Crater, staying aloft for nearly 63 seconds, JPL officials wrote in another tweet. The solar-powered rotorcraft set down at a new airfield, the fourth one it has reached since landing on the Red Planet with NASA’s Perseverance rover on Feb. 18.

Both the rover Perseverance and Ingenuity are traveling south on the floor of Jezero Crater, with the helicopter leapfrogging ahead every few weeks. On the map the red dot indicates Perseverance location, with the green dots Ingenuity’s last three landing sites. They have not yet added to the map exactly where Ingenuity landed yesterday (#7), so I have estimated it based on the information above.

The red outline indicates the region they are planning to explore over the next few months in order to gather a very thorough understanding of the geology of the floor of Jezero Crater. They will eventually head to the northwest towards the cliffs in the upper left, which is the foot of the large delta that flowed in the past into the crater through a gap in its western rim. The route they will take to get there however remains undetermined.

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Eroding Martian lava?

12:49 pm

Eroding Martian lava?
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on April 19, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Requested by Colin Dundas of the U.S. Geological Survey’s Astrogeology Science Center in Arizona, the image was entitled “Enigmatic Terrain in Elysium Planitia.” The image is labeled so because, as Dundas explained,

Flood lava is a key part of the feature, best seen at the north and south ends of the image. What’s unusual is the knobby terrain at the center. … I haven’t yet been able to do a more thorough study of these features, so plenty of puzzles remain!

The higher material in the upper right is likely flood lava. A 2016 paper [pdf] led by Dundas on similar features in Elysium Planitia that were not as knobby found their origin somewhat baffling. The evidence suggested that lava, mud, wind, and ice could all be involved in their formation, but the evidence was also not sufficient to eliminate any possibility.

In the case of today’s image, the explanation might also be any of these possibilities. For example, we might be looking at the erosion of the flood lava, exposing harder knobs of different material that had been there before and had been covered by the lava. Or maybe the knobs are simply the last bits of that layer of flood lava that has not yet eroded away.

As always, the overview map provides some context.
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Juno takes first close-up images of Ganymede since 2000

9:21 am

Ganymede as seen by Juno
Click for full image.

Ganymede as seen by Juno
Click for full image.

On June 7th the Jupiter orbiter Juno made its first close fly-by of Ganymede, taking the first close-up images of this Jupiter moon since the orbiter Galileo flew past in 2000.

The first two images from NASA Juno’s June 7, 2021, flyby of Jupiter’s giant moon Ganymede have been received on Earth. The photos – one from the Jupiter orbiter’s JunoCam imager and the other from its Stellar Reference Unit star camera – show the surface in remarkable detail, including craters, clearly distinct dark and bright terrain, and long structural features possibly linked to tectonic faults.

…Using its green filter, the spacecraft’s JunoCam visible-light imager captured almost an entire side of the water-ice-encrusted moon. Later, when versions of the same image come down incorporating the camera’s red and blue filters, imaging experts will be able to provide a color portrait of Ganymede. Image resolution is about 0.6 miles (1 kilometer) per pixel.

In addition, Juno’s Stellar Reference Unit, a navigation camera that keeps the spacecraft on course, provided a black-and-white picture of Ganymede’s dark side (the side opposite the Sun) bathed in dim light scattered off Jupiter. Image resolution is between 0.37 to 0.56 miles (600 to 900 meters) per pixel.

Both images are to the right, each slightly reduced to post here. These images of this moon of Jupiter, the largest moon in the solar system and about 26% larger than the planet Mercury, reveal many of the same unsolved geological mysteries uncovered when the Galileo orbiter photographed it two decades ago. As I wrote in my Chronological Encyclopedia

Closer inspection of Ganymede revealed a strange topography, including patches of grooved terrain (not unlike the surface of a vinyl record) overlaying other patches of grooved terrain, the different patches oriented in random and totally unrelated directions. Moreover, the surface is overlain by bright and dark patches (the bright patches thought to be caused by water frost) that often had no apparent correspondence to topographical features. Planetary geologists could only scratch their heads in wonderment.

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China releases orbital image showing Zhurong on Mars

10:46 am

Zhurong on Mars
Click for original image.

China’s state-run press today released two images taken by its Tianwen-1 Mars orbiter showing its Zhurong rover on the surface of Mars.

Those photos are to the right. The top shows the location prior to the rover’s landing. The bottom, taken on June 2nd, shows the rover and its landing platform, as well as its entry capsule, heat shield, and parachutes.

In the image, taken by a high-resolution camera installed on the orbiter of Tianwen-1 at 6 p.m. on June 2 (Beijing Time), two bright spots are visible in the upper right corner. The larger one is the landing platform, and the smaller one is the Zhurong Mars rover, the CNSA said.

…The dark area surrounding the landing platform might be caused by the influence of the engine plume during landing. The symmetrical bright stripes in the north-south direction of the landing platform might be from fine dust when the landing platform emptied the remaining fuel after landing, the CNSA said.

The bright spots in the center of the image are the back cover of the entry capsule and the parachute jettisoned during the landing. Another bright spot in the lower left of the image is the heat shield of the entry capsule, the CNSA said.

Based on the second photo, it appears that Zhurong has barely moved far from the lander since it rolled off on May 22nd.

And that’s all we really know. The Chinese press release provides no details about how well the rover is functioning, where exactly this location is on the surface of Mars, nor anything else of interest. The rover might be in the region covered by the MRO photos I posted yesterday, but if so the resolution isn’t good enough for me to find the spot. I am sure however that MRO scientists are presently carefully comparing their highest resolution version with these Tianwen-1 images to pinpoint it. They will then follow-up with their own high-resolution images of Zhurong from MRO.

The rover has a planned mission length of 90 Martian days, which runs through the end of August. How much the Chinese government will reveal about its operations and results however remains completely unknown. If it functions as planned expect science papers published in about a year. If not we will only get silence.

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Mini-volcanoes (mud or lava?) near Zhurong’s Mars landing site

2:11 pm

Mosaic of features near Zhurong's planned landing site on Mars
Click here, here, and here for full images.

Cool image time! Though we still do not know exactly where the Chinese Mars rover Zhurong landed on Mars, we have a rough idea based on the latitude and longitude numbers leaked to the Chinese press in October 2020 and were apparently confirmed by photos taken by the Tianwen-1 orbiter soon after reaching Mars. We also know Zhurong’s engineers wanted to land in the northern lowland plains dubbed Utopia Planitia, a region that is relatively flat and thus makes a safe landing spot for their first attempt to reach the surface of Mars.

The mosaic to the right, rotated and reduced to post here, is made from three context camera images taken by Mars Reconnaissance Orbiter (MRO). The white cross on the right edge is essentially Zhurong’s leaked landing spot. The red box indicates the area covered by one of only two photos that China has released that were taken by its Tianwen-1 orbiter.

The white box in the upper left shows the area covered by today’s cool image, shown below.
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Curiosity’s dramatic path forward

12:40 pm

Curiosity's future travels
Click for full image.

Cool image time! In the coming weeks and months the view from Curiosity is going to give us the most spectacular views of another world since the Apollo astronauts walked on the Moon.

In today’s download of new images from the Mars rover Curiosity was the photo above, reduced to post here. Taken by rover’s right navigation camera, it looks west directly in line with Curiosity’s future travels, and shows that it is now finally entering mountain country.

The overview map below provides the context.
» Read more

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New investment capital pours into commercial space

10:29 am

Launcher's E2 engine
Launcher’s 3D printed E2 engine, claimed by the company
to be the highest performance engine for small rockets.

Capitalism in space: Three stories today underlined superbly the robust and steadily growing state of the commercial space industry. Moreover, these stories suggest that this growth will be permanent with almost no limit to its possibilities.

To begin, we have the public appearance of another startup smallsat rocket company, dubbed Launcher.

Small launch vehicle developer Launcher has raised $11.7 million in a Series A funding round, which the company says puts it on a path to reaching orbit with a fraction of the total investment of other launch startups. Launcher said June 2 that the Series A round was co-led by Boost.VC and the company’s founder, Max Haot, both of whom earlier provided seed funding to the startup. Haot invested $5 million using proceeds of a camera company, Mevo.com, that he sold earlier this year to Logitech. Other existing and new investors also participated in the round, which Haot told SpaceNews was oversubscribed.

…Launcher is working on a small launch vehicle called Launcher Light, intended to be similar in performance to Rocket Lab’s Electron, which can place up to 300 kilograms into low Earth orbit. Launcher Light is a smaller version of Rocket-1, the company’s original vehicle, which Haot said in March should speed up development since it will require fewer engines.

The company hopes to launch by ’24, and is also planning another fund-raising round next year to raise an additional $40 million.

Considering the large number of new rocket companies raising capital, who knows if this company will make it. Certainly some will grab market share and survive, but more likely in the coming decade there will be a shake-out where many will either consolidate or disappear, similar to what happened in the early days of the automobile industry.

That so many similar new rocket companies are attracting so many investors however shows that people with money are now convinced that space is the place, and the future there is very bright for profit. And what lends weight to this sentiment are the other two stories today, both of which involve new space startups that are not rocket companies but the kind of ground facilities required by the satellites those rockets launch.
» Read more

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Third set of new results from Parker released

9:32 am

The scientists using the Parker Solar Probe on June 2nd released their third set of new results as part of a special issue of the journal Astronomy & Astrophysics.

The latest articles include data analysis, theory, and modeling. Among the major topics covered are magnetic switchbacks first discovered by Parker Solar Probe, the role of waves in heating solar plasma, solar angular momentum, the near-Sun dust environment, and the diversity of small energetic-particle events.

The most interesting paper I think is the one describing data that lends strong weight to the theory, proposed in 1929 by astronomer Henry Norris Russell, that a dust-free zone exists close to the Sun and all stars. From the abstract:

The observed brightness decrease in the axis of symmetry is interpreted as the signature of the existence of a dust density depletion zone between about 19 [solar radii] and 3 [solar radii] which at the inner limit of WISPR’s field of view of 7.65 [solar radii] has a dust density that is ~5% lower than the density at 19 [solar radii], instead of the expected density which is three times if no depletion zone exists.

In plain English, the data shows that from about 1.3 million to 8.2 million miles from the Sun Parker found far less dust than predicted by other models. As the probe continues to lower its orbit and get closer to the Sun with each fly-by these numbers will be better refined, and are likely to in the end prove Russell’s hypothesis.

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Problem with Ariane 5 rocket causes Arianespace to delay Webb telescope launch

9:08 am

As first revealed in mid-May, Arianespace has been forced to delay the launch of the James Webb Space Telescope by at least one month because of a problem with the fairing on its Ariane 5 rocket, found during an August 2020 launch.

There have been no Ariane 5 launches since. According to yesterday’s press briefing, however:

“The origin of the problem has been found. Corrective actions have been taken,” Daniel de Chambure, acting head of Ariane 5 adaptations and future missions at ESA, said. “The qualification review has started, so we should be able to confirm all that within a few days or weeks.” He did not elaborate on the problem or those corrective actions, beyond stating that the problem took place during separation of the payload fairing. Industry sources said in May that, on the two launches, the separation system imparted vibrations on the payload above acceptable limits, but did not damage the payloads.

It appears this new delay to Webb’s launch is because two commercial payloads must lift off first before Webb, with the first now scheduled for July. According to Arianespace, it will take two months prep for the next commercial launch, followed by two months prep for the Webb launch. That puts the launch of Webb in November.

Overall this particular delay is slight, only a few weeks, and pales in comparison to the ten years of delays experienced by NASA during development and construction of Webb. It also will add very little to the telescope’s overall budget, which has grown from an original price of $500 million to now about $10 billion.

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NASA picks two missions to fly to Venus later this decade

2:14 pm

NASA today announced two new missions to go to Venus to study its atmosphere and surface, both scheduled to launch sometime between 2028 and 2030.

One, dubbed DAVINCI+, send a probe into Venus’s atmosphere, both to measure its gases as well as taken the first high resolution images of a unique Venusian geological called “tesserae.” On radar images tesserae regions appear to be high plateaus cross-cut with many sharp ridges.

The second, dubbed VERITAS, will be a radar-orbiter designed to map the planet’s surface at higher resolution than the earlier Pioneer and Magellan radar orbiters. It will also do this:

VERITAS also will map infrared emissions from Venus’ surface to map its rock type, which is largely unknown, and determine whether active volcanoes are releasing water vapor into the atmosphere.

That data will help tell us whether there are now active volcanoes on Venus. The data we presently have suggest it is a planet of many volcanoes, numbering in the millions. That data has also hinted at the possibility that some are active. VERITAS will attempt to find out.

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Inexplicable ridges north of China’s Mars rover

2:00 pm

Wrinkle ridges in Utopia Planitia?
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, shows some unusual geology about 450 miles north of the approximate area where China’s Zhurong rover landed in the northern lowlands of Mars. It was taken on April 14, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

These scattered ridges remind me of wrinkle ridges, formed when the surface of a place shrinks. With less surface area, the extra material needs somewhere to go, and so ridges are forced up at weak points to release the pressure.

Assuming this hand-waving explanation is true, the next question would be: What causes the shrinking? The overview map below might help provide an answer.
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