Category: Points of Information

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

Gadsden flag kid sues school and its officials for violating his first amendment rights

1:26 pm

Jaiden and school official
Jaiden Rodriguez reacting with bemused
disbelief by the ignorance of the school
official behind him. Click to watch the video

In August 2023 the Vanguard School in Colorado Springs demanded that 12-year-old Jaiden Rodriguez remove patches on his daypack showing the Gadsden flag as well as some funny Pac-men holding guns or he would be banned from classes. Jaiden refused, and the resulting uproar — forcing the cancellation of a scheduled parents night — caused school officials to quickly back down and give Jaiden permission to attend classes with the daypack and Gadsden flag patch.

For the school the most embarassing part of the story was how it illustrated the total ignorance of school officials about American history as well as the First Amendment. School officials, who are supposed to teach history to their students, knew less about American history than Jaiden. They falsely claimed that the Gadsen flag had “its origins in slavery and the slave trade,” when it was actually created during the American Revolution as a symbol against tyranny. In addition, they ignorantly claimed they had the right to censor Jaiden, simply because his patches “might” offend some students, when the Supreme Court has consistently ruled for more than a half century that they did not have that right.

The uproar caused the school’s board of directors to issue a retraction, though they did not waive the ban on the armed Pac-men patches. Moreover:
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A Martian splash crater in the northern lowland plains

10:12 am

A Martian splash crater
Click for original image.

Cool image time (necessary when there is no real space news to report)! The picture to the right, cropped, reduced, and sharpened to post here, was taken on June 29, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what the scientists label as “steep crater walls.”

And the interior slopes of this 5-mile-wide unnamed crater are steep, about 600 feet high and descending at a grade of 10 to 13 degrees, getting steeper as you go down. In fact, the floor of the crater itself continues that slope downward to the west until it reaches the base of its western interior wall. For some reason the glacial material within it is piled up higher on its eastern end.

The dark streaks on the crater interior walls are either slope streaks or recurring slope lineae, with the former appearing somewhat randomly and the latter seasonal in nature. Both remain unexplained unique phenomenons of Mars. This new picture was likely a follow-up of a January 2014 MRO picture to see if anything had changed in the past decade.

To my eye it is difficult to detect any changes, but I am not looking at the highest resolution version of the picture. The lack of changes suggests the streaks are seasonal lineae, as both images were taken in the northern spring and the streaks in both appear much the same.
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China successfully launches classified satellite

10:27 pm

China tonight (November 1, 2023 in China) successfully launched a classified satellite, its Long March 6 rocket lifting off from its Taiyuan spaceport in the north part of the country.

No video of the launch was released. Nor were any pictures. In addition, no information was released describing where the rocket’s first and second stages crashed. Both use kerosene and oxygen, so neither is as toxic as China’s other older rockets using hypergolic fuels, but China also does not make any apparent effort to control these crash landings.

The leaders in the 2023 launch race:

78 SpaceX
49 China
14 Russia
7 Rocket Lab
7 India

American private enterprise still leads China 90 to 49 in successful launches, and the entire world combined 90 to 78. SpaceX by itself is now tied with the rest of the world (excluding American companies) 78 to 78.

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October 31, 2023 Quick space links

3:34 pm

Courtesy of BtB’s stringer Jay.

 

 

 

 

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Scour pits of volcanic Martian ash

3:12 pm

Scour pits in volcanic ash
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on June 16, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The science team describes this as “clusters of scour pits,” which means the pits here were formed by the prevailing winds, which according to a global analysis of dunes on Mars, is probably blowing from the west to the east at this location.

This image only covers a small section of these scour pits. The full field extends about 20 by 18 miles across, and appears to be the southeastern flank of a mile-high dome. The scour marks could therefore also be evidence of some sagging of this material downhill along that flank.

It is also possible that the flow of the prevailing winds across this southeastern downhill slope is causing the pit formation. Unlike this flank, the rest of this dome is relatively smooth.
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Ingenuity completes 64th flight on Mars

9:49 am

Overview map
Click for interactive map.

Ingenuity's view just before landing
Click for original image.

In a pattern that is beginning to be almost routine, on October 27, 2023 the Mars helicopter Ingenuity completed its 64th flight on Mars, flying 1,348 feet at a speed of 13 mph for 139 seconds at an altitude of 39 feet.

As with most of its recent flights, the distance and time was slightly longer than the flight plan, likely because the helicopter took extra time finding a good landing spot.

On the overview map above, the green line marks the flight path, and the green dot the helicopter’s present position. The blue dot marks Perseverance’s present position. The yellow lines indicate the area covered by the color image to the right, cropped, reduced, and enhanced to post here. This image was taken by Ingenuity just a few seconds before landing, and looks across the floor of Neretva Vallis, where Perseverance will soon be traveling.

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On the Space Show tonight

9:04 am

Tonight I will be doing another long appearance from 7:00-9:00 pm (Pacific) with David Livingston on The Space Show. I hope my readers tune in and, more importantly, call in with questions.

When I scheduled this with David several months ago, I told him my expectation was that Starship/Superheavy would still be on the ground due to government blockage. He hoped not. I am sad to say I was right, when I really really wanted to be wrong.

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Scientists detect salts and carbon-based molecules on Ganymede

8:47 am

Ganymede as seen by Juno
A close-up image taken during the June 7, 2021
Juno fly-by of Ganymede Click for original image.

Using data obtained during a close fly-by of Ganymede by Juno in June 2021, scientists have detected evidence of salts and organic carbon-based molecules.

On June 7, 2021, Juno flew over Ganymede at a minimum altitude of 650 miles (1,046 kilometers). Shortly after the time of closest approach, the JIRAM instrument acquired infrared images and infrared spectra (essentially the chemical fingerprints of materials, based on how they reflect light) of the moon’s surface. Built by the Italian Space Agency, Agenzia Spaziale Italiana, JIRAM was designed to capture the infrared light (invisible to the naked eye) that emerges from deep inside Jupiter, probing the weather layer down to 30 to 45 miles (50 to 70 kilometers) below the gas giant’s cloud tops. But the instrument has also been used to offer insights into the terrain of moons Io, Europa, Ganymede, and Callisto (known collectively as the Galilean moons for their discoverer, Galileo).

The JIRAM data of Ganymede obtained during the flyby achieved an unprecedented spatial resolution for infrared spectroscopy – better than 0.62 miles (1 kilometer) per pixel. With it, Juno scientists were able to detect and analyze the unique spectral features of non-water-ice materials, including hydrated sodium chloride, ammonium chloride, sodium bicarbonate, and possibly aliphatic aldehydes.

The data indicated that the salts and organics were most concentrated in Ganymede’s equatorial regions, which are less impacted by Jupiter’s strong magnetic field. The scientists think these materials originally came from the brine of an underground ocean that somehow reached the surface, though this hypothesis remains unconfirmed.

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Chinese crew completes five-month mission on Tiangong-3 after return to Earth

8:32 am

The new colonial movement: A three-man Chinese crew successfully landed today in north China in their Shenzhou capsule, completing a five-month mission on the Tiangong-3 space station.

The full mission length was 154 days. China claims that one of the astronauts was a civilian, but that really means nothing considering the security required to participate in these missions.

The crew that has taken over on Tiangong-3 are expected to do a mission of comparable length, probably pushing the length to six-months.

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SpaceX launches another 23 Starlink satellites

4:30 pm

SpaceX today successfully launched 23 more Starlink satellites, its Falcon 9 rocket lifting off from Cape Canaveral.

The first stage successfully completed its eighth flight, landing on a drone ship in the Atlantic.

The leaders in the 2023 launch race:

78 SpaceX
48 China
14 Russia
7 Rocket Lab
7 India

American private enterprise now leads China 90 to 48 in successful launches, and the entire world combined 90 to 77. SpaceX by itself now leads the rest of the world (excluding American companies) 78 to 77.

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October 30, 2023 Quick space links

4:12 pm

Courtesy of BtB’s stringer Jay.

 

  • Visual maps showing who has put the most satellites in orbit in 2023, here and here

    • Not surprisingly, the maps make it obvious how much SpaceX now dominates the space industry.

 

 

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Chandra X-rays a giant hand in space

3:54 pm

A cosmic hand
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken by the Chandra X-ray Observatory, with data from the orbiting IXPE producing the lines that indicate the orientation of the magnetic field lines.

The image was part of research studying what the scientists call Pulsar Wind Nebulae (PWNe).

[E]arly-on when the new-born pulsar is still deep in its parent supernova remnant, or at late times after it has escaped to the relatively uniform interstellar medium, the pulsar wind is often uniform around the pulsar spin or velocity axis. In projection on the sky such structures have bilateral symmetry, that is, the two halves mirror each other. This makes them look (vaguely) like animals. This has led to many PWNe collecting animal monikers (‘The Mouse’, ‘The Dragonfly’, ‘The Rabbit’ – we are guilty of some of these…).

In between these early and late phases, the story is often more complex and the PWN interaction with the supernova shock wave leads to complicated morphologies. One of the prime examples is the PWN in the supernova remnant RCW 89 (also known as MSH 15-5(2)). Here the complex interactions form the PWN into the `Cosmic Hand’. Wanting to map the magnetic fields which structure this hand, the IXPE team took a long hard stare at MSH 15-5(2) and its central pulsar.

The scientists admit that the match between IXPE’s data and the structure of the hand is not really a surprise, but confirming the match was necessary if they are ever going to figure out the fundamental laws that govern magnetic fields, laws that presently are not well understood, at all.

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A spiral galaxy giving birth to a lot of stars

10:01 am

A spiral galaxy giving birth to a lot of stars
Click for original image.

Time for another cool galaxy image! The picture to the right, reduced and sharpened to post here, was taken by the Hubble Space Telescope, and shows what some informally refer to as the “‘Spanish Dancer Galaxy’ because the “vivid and dramatic swirling lines of its spiral arms … evoke the shapes and colours of a dancer’s moving form. ”

Though this galaxy’s two main arms cause it to resemble a barred galaxy, it lacks a central bar, suggesting it is young. The numerous reddish and pink regions in the arms, all of which are thought to be star-forming regions, also suggest the galaxy is young, still giving birth to many stars.

It is located about 60 million light years away, and is part of what scientists label the Doradus galaxy group, which contains less than a hundred galaxies. In comparison, a galaxy cluster is much larger, containing hundreds to thousands of galaxies.

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Two mouse embryos successfully grown on ISS

9:41 am

Mouse embryos from experiment
Taken from figure 2 of the paper

In a paper just published, scientists reveal that in 2021 they successfully grew two mouse embryos in weightlessness on ISS, suggesting that “perhaps mammalian space reproduction is possible, although it may be somewhat affected,” as they note in the conclusion of their paper [pdf].

From the papers abstract:

The embryos cultured under microgravity conditions developed into blastocysts with normal cell numbers, ICM, trophectoderm, and gene expression profiles similar to those cultured under artificial-1 g control on the International Space Station and ground-1 g control, which clearly demonstrated that gravity had no significant effect on the blastocyst formation and initial differentiation of mammalian embryos.

The images to the right come from the paper’s second figure, and compare the blastocysts from a ground control (top), an 1g artificial sample on ISS (middle), and the weightless result (bottom).

The experiment has many uncertainties, with the low number of embryos tested the most important. Quoting the paper’s conclusion again, the possibilities of refining this experiment for better results are great:

Unfortunately, the number of blastocysts obtained from the ISS experiment was not abundant; and we have not been able to confirm the impact on offspring because we have not produced offspring from embryos developed in space. We believe that the ETC [the experiment itself] will allow blastocysts to be frozen on the ISS if a cryoprotectant is used in place of PFA [a solution of formaldehyde]. Then, the frozen blastocysts could be brought back to Earth for transfer to a female recipient, and the viability of the blastocysts could be evaluated. Moreover, we could design a device to launch frozen oocytes and spermatozoa to the ISS, where in vitro fertilization experiments could be performed in microgravity. The use of this approach would be cheaper. Furthermore, the study of mammalian reproduction in space is essential to start the space age, making it necessary to study and clarify the effect of space environment before the ISS is no longer operational.

Despite the uncertainties, these results are significant. They suggest that human reproduction in zero gravity is possible, which also suggests it will be even more possible in lower gravity environments like the Moon or Mars.

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An infrared view of the Crab Nebula by Webb

9:14 am

Webb's image of the Crabb compared to Hubble's
Click for original image.

Using the Webb Space Telescope astronomers have taken the first detailed infrared image of the Crab Nebula, the remnant from a supernova that occurred in 1054 AD.

The two pictures on the right compare Webb’s false color infrared view with a natural light Hubble image in optical wavelengths, taken in 2005. From the press release:

The supernova remnant is comprised of several different components, including doubly ionized sulfur (represented in red-orange), ionized iron (blue), dust (yellow-white and green), and synchrotron emission (white). In this image, colors were assigned to different filters from Webb’s NIRCam and MIRI: blue (F162M), light blue (F480M), cyan (F560W), green (F1130W), orange (F1800W), and red (F2100W).

In comparing the images, it appears the scientists chose colors for the Webb image to more or less match those of Hubble’s natural color picture. However, as the press release notes:

Additional aspects of the inner workings of the Crab Nebula become more prominent and are seen in greater detail in the infrared light captured by Webb. In particular, Webb highlights what is known as synchrotron radiation: emission produced from charged particles, like electrons, moving around magnetic field lines at relativistic speeds. The radiation appears here as milky smoke-like material throughout the majority of the Crab Nebula’s interior.

This feature is a product of the nebula’s pulsar, a rapidly rotating neutron star. The pulsar’s strong magnetic field accelerates particles to extremely high speeds and causes them to emit radiation as they wind around magnetic field lines. Though emitted across the electromagnetic spectrum, the synchrotron radiation is seen in unprecedented detail with Webb’s NIRCam instrument.

The release also notes this remarkable but somewhat unfortunate fact:

Scientists will have newer Hubble data to review within the next year or so from the telescope’s reimaging of the supernova remnant. This will mark Hubble’s first look at emission lines from the Crab Nebula in over 20 years, and will enable astronomers to more accurately compare Webb and Hubble’s findings.

In 2005 repeated Hubble images of the Crab revealed that its filaments and radiation were stormy, with constant activity. The scientists actually produced a movie of those changes. It was expected that new images would be taken at regular intervals to track that activity. Apparently it was not, either because no scientist was interested or the committee that assigns time on Hubble decided this wasn’t important enough reseach.

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SpaceX successfully launches another 22 Starlink satellites

9:27 am

SpaceX early this morning successfully launched another 22 Starlink satellites, its Falcon 9 rocket lifting off from Vandenberg in California.

The first stage completed its seventh flight, landing on a drone ship in the Pacific.

The company has another Starlink launch scheduled for later today, taking off from Cape Canaveral. UPDATE: Aborted at T-30 seconds for a technical issue, and rescheduled for October 30, 2023.

The leaders in the 2023 launch race:

77 SpaceX
48 China
14 Russia
7 Rocket Lab
7 India

American private enterprise now leads China 89 to 48 in successful launches, and the entire world combined 89 to 77. SpaceX by itself is now tied with the rest of the world (excluding American companies) 77 to 77.

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Intuitive Machines delays launch of its Nova-C lunar lander two months

10:04 am

South Pole of Moon with landing sites

Intuitive Machines yesterday announced that it has decided to delay the launch of its Nova-C lunar lander from in November launch window to a new window beginning on January 12, 2023.

The company did not elaborate on the reasons for the delay. However, executives warned at a media event Oct. 3 that “pad congestion” at LC-39A could delay their launch. The mission has to launch from that pad, rather than nearby Space Launch Complex 40, because only LC-39A is equipped to fuel the lander with methane and liquid oxygen propellants on the pad shortly before liftoff.

That pad is used for Falcon 9 crew and cargo missions to the International Space Station as well as Falcon Heavy launches. The pad is scheduled to host the Falcon 9 launch of the CRS-29 cargo mission Nov. 5 followed by a Falcon Heavy mission for the Space Force in late November. Converting the pad between Falcon 9 and Falcon Heavy launches can take up to three weeks.

The landing site is indicated by the green dot on the map of the south pole to the right. Note that this landing will be the closest to the south pole yet, though not at the south pole. It will also be the first to land next to a crater that has a permanently shadowed interior, though Nova-C will not be able to enter it because it carries no rover and is only designed to last through the first lunar day.

Based on the present launch schedule, Astrobotic now gets the first chance to successfully land a privately built lunar lander. It is scheduled to launch on December 24, 2023 on a Vulcan rocket. The Japanese company Ispace attempted and failed to land its Hakuto-R1 spacecraft in April.

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October 27, 2023 Quick space links

4:20 pm

Courtesy of BtB’s stringer Jay.

 

 

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The son of one of the co-founders of Hamas tells it like it is

2:13 pm

Rather than write another long essay detailing (based on facts) the evil and genocidal nature of Hamas in Gaza, I think it better today to let Mosab Hassan Yousef, the oldest son of Hamas co-founder Sheikh Hassan Yousef, do the speaking. An interview of him by Sky News Australia conducted yesterday is embedded below.

His passionate horror of Hamas — from long very personal experience — is evident and clear. So is his intellectual honesty. He will not lie to himself for the sake of alliance, ethnicity, religion, or anything. All that matters is the truth, which he states very bluntly.

“This is my message: an ex-Hamas member, as a son of one of Hamas’ founders, enough of this. If we don’t stop them now, the next war is going to be deadlier and only God knows what will happen next if Hamas is not finished as soon as possible,” Mr Yousef said.

“They opened the gates of hell on the Palestinian people.

“They are willing to actually sacrifice many Palestinian children, the entire Palestinian people and use them as fuel to … achieve their ideological agendas, their religious agendas.”

To underline the truth of his words, for his own protection Yousef now lives in the United States, his location was kept secret, and he refused to answer any personal questions about his specific plans. He knows better than anyone that Hamas will kill him if it can. It is a organization of violence, hate, and murder. Defy it, no matter who you are, and it will have no mercy upon you.

For such an organization civilized people should exhibit no mercy. It must be treated as the Nazis were treated in World War II. It must be obliterated, no matter the cost.

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Giant airship gets clearance for test flights

10:45 am

A giant rigid-frame balloon airship, dubbed Pathfinder-1 and reminiscent of the airships from the early 20th century, has gotten clearance to begin flight tests at Moffett Field in California.

At 407 ft (124 m) long and 66 ft (20 m) in diameter, it’s considerably longer than the “flying buttocks” of the Airlander 10, although less than half of its width. It might not qualify as the world’s largest aircraft, but it’s still absolutely enormous, approaching twice the length of an Airbus A380.

…Currently housed in a monstrous hangar in Mountain View, California, Pathfinder 1 has already flown indoors earlier this year. According to IEEE Spectrum, the company has now been awarded the special airworthiness certificate required to fly this beast outdoors – at less than 1,500 ft (460 m) of altitude, and within the boundaries of Moffett Field and the neighboring Palo Alto Airport’s airspace.

Because of the lightweight materials being used, Pathfinder-1 will use helium, not hydrogen, to lift it. The hope is that this airship can be used to transport cargo. The project is financed by Google co-founder Sergey Brin.

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Is a recently discovered near Earth asteroid a piece from the Moon?

10:38 am

The uncertainty of science: Researchers now think they have enough information to claim that a recently discovered near Earth asteroid, dubbed Kamo`oalewa, could actually be a piece of the Moon, flung from it during a asteroid impact in the past few million years.

The 2021 study found that Kamo`oalewa’s spectrum was unlike that of other near-Earth asteroids but matched most closely that of the moon. Based on this, the team hypothesized that the asteroid could have been ejected from the lunar surface as a result of a meteoroidal impact.

In the new study, Malhotra and her team wanted to determine the feasibility for a knocked-off piece of the moon to get into this quasi-satellite orbit – a phenomenon that is quite unlikely, Malhotra said. Moon fragments that have enough kinetic energy to escape the Earth-moon system also have too much energy to land in the Earth-like orbits of quasi-satellites, she said.

With numerical simulations that accurately account for the gravitational forces of all the solar system’s planets, Malhotra’s group found that some lucky lunar fragments could actually find their way to such orbits. Kamo`oalewa could be one of those fragments created during an impact on the moon in the past few million years, according to the study.

The scientists add that the asteroid’s solar orbit, which keeps its flying in relative formation with the Earth for millions of years, strengthens this hypothesis.

It must be noted that this remains an unconfirmed hypothesis. A spacecraft would have to visit Kamo’oalewa and obtain samples to study to confirm it.

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UK awards German launch startup Rocket Factory Augsburg $4.3 million for first launch

10:32 am

The United Kingdom has given a $4.3 development grant to the German launch startup Rocket Factory Augsburg (RFA) to pay for launch preparations at the Saxavord spaceport in the Shetland Islands.

The real news from this article however is the continuing delays for anyone to launch from Great Britain. Previously the two Scottish spaceports, one in Shetland and the other in Sutherland, had anticipated the first launches in 2023, from the three companies RFA, Orbex, and ABL. Now it appears that those launches could be delayed into the middle of 2024.

RFA currently expects to launch its three-stage, 30-meter-tall RFA One rocket at some point during the three months to the end of June, recently delayed from the end of this year.

…ABL had planned to conduct its SaxaVord Spaceport launch in 2023, but has yet to announce a date for its next launch attempt anywhere after its inaugural mission from Alaska failed to reach orbit Jan. 10.

ABL is gearing up for its second launch attempt, hopefully before the end of this year, but it will do it from the Kodiak spaceport in Alaska.

One can’t help wondering if these delays are connected the red tape from UK’s Civil Aviation Authority (CAA), which delayed issuing a launch licence to Virgin Orbit so long it literally helped bankrupt the company. For example, Orbex applied for its launch license from Sutherland in January 2022, and 22 months later it apparently has still not gotten an approval from the CAA.

This grant from the UK government might be that government’s effort to keep RFA — faced with CAA delays — from switching its launch site out of Great Britain.

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Russia’s Soyuz-2 rocket launches military satellite

9:40 am

Russia today used its Soyuz-2 rocket to launch a classified military surveillance satellite, lifting off from its Plesetsk spacesport in northern Russia.

A graphic at the link shows the rocket’s flight path crossed over almost all of Russia as it flew east, with its lower stages and fairings crashing on land. Though the drop zones were inside Russia, there are very isolated regions in the high Arctic latitudes, with few inhabited areas.

The leaders in the 2023 launch race:

76 SpaceX
48 China
14 Russia
7 Rocket Lab
7 India

American private enterprise still leads China 88 to 48 in successful launches, and the entire world combined 88 to 77. SpaceX by itself now trails with the rest of the world (excluding American companies) 76 to 77.

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October 26, 2023 Quick space links

3:43 pm

Courtesy of BtB’s stringer Jay.

 

 

 

 

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Pushback: Fired director of college’s Diversity, Equity, and Inclusion department accuses movement of promoting bigotry

2:31 pm

Tabia Lee
Tabia Lee, fighter for freedom and a
color-blind society

They’re coming for you next: Tabia Lee, a black woman who was fired as faculty director for the Office of Equity, Social Justice, and Education [OESE] at De Anza College in California has, as promised, refused to go quietly.

As I reported in March, Lee was fired because she took the word “inclusion” literally, trying to establish a color-blind policy that would provide some aid and comfort to the Jewish students on campus who were experiencing almost daily incidents of harassment and bigotry, simply because they were Jewish.

Her reward? She was herself harassed, with some calling her a “dirty Zionist,” then denied tenure, then fired.

Since then she has not gone quietly into that good night. In July Lee suited De Anza College, as well as ten specific school officials, charging the school violated her First Amendment rights, California’s Constitution, and its Common Law in censoring and firing her.

Her name came up again this week because she wrote a blistering op-ed for the New York Post, blasting not only De Anza for its racist DEI policies, but blasting the entire “Diversity, Equity, and Inclusion” movement as nothing more that a Nazi-like movement promoting bigotry and hate.
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The icy terrain near one of Starship’s prime candidate landing spots on Mars

1:35 pm

The icy terrain near Starship's prime landing spot on Mars
Click for original image.

Cool image time! The picture to the right, cropped to post here, was taken on August 22, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The camera team labeled the picture a “terrain sample,” which generally means it was not taken as part of any scientist’s specific research request, but to fill a gap in the schedule so as to maintain the camera’s proper temperature. When the team needs to do this, they try to pick a location in the gap that might have some interesting features. Sometimes such pictures show relatively boring features. Sometimes the results are fascinating.

In this case the location chosen was in the northern lowland plains of Mars, in a region called Amazonis Planitia. At 38 degrees north latitude it is not surprising that the photo shows ice features. All the depressions here appear to have an eroding glacier, while the surrounding plateau resembles an untouched snow field in the very early spring, the snow beginning to sublimate away to leave the top rough and stuccoed. Note too that these depressions are likely not impact craters (they have no upraised rims and many are distorted in shape), but were likely formed by that same sublimation process.
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New data better maps the supernova remnant SN1006

10:50 am

SN1006, as seen in X-rays
Click for original image.

Using data from both the Chandra X-ray Observatory and the Imaging X-ray Polarimetry Explorer (IXPE), scientists have now better mapped the magnetic field and the remnant from the supernova that occurred in 1006 AD.

The false color image to the right shows this data. From the caption:

The red, green, and blue elements reflect low, medium, and high energy X-rays, respectively, as detected by Chandra. The IXPE data, which measure the polarization of the X-ray light, is show in purple in the upper left corner, with the addition of lines representing the outward movement of the remnant’s magnetic field.

From the press release:

Researchers say the results demonstrate a connection between the magnetic fields and the remnant’s high-energy particle outflow. The magnetic fields in SN 1006’s shell are somewhat disorganized, per IXPE’s findings, yet still have a preferred orientation. As the shock wave from the original explosion passes through the surrounding gas, the magnetic fields become aligned with the shock wave’s motion. Charged particles are trapped by the magnetic fields around the original point of the blast, where they quickly receive bursts of acceleration. Those speeding high-energy particles, in turn, transfer energy to keep the magnetic fields strong and turbulent.

At present scientists really do not understand the behavior of stellar-sized magnetic fields. It is very complex, involving three dimensional movements that are hard to measure, as well as electromagnetic processes that are not well understood. While this new data doesn’t provide an explanation, it does tell us better what is actually happening. The theories will follow.

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Australia and the U.S. agree to facilitate rocket launches in Australia

10:37 am

A technology agreement announced on October 25, 2023 between Australia and the U.S. included language that will allow for American rocket companies to launch from Australia, as well as Australian rocket companies to launch American satellites.

According to the White House statement, the agreement…

…provides the legal and technical framework for U.S. commercial space launch vehicles to launch from Australia in a manner that: protects sensitive U.S. launch technology and data in Australia consistent with our shared nonproliferation goals; and creates the potential for new space-related commercial opportunities.

A private Australian spaceport, Equatorial Launch Australia (ELA), has been working to bring U.S. launches there. In addition, an Australian rocket startup, Gilmour Space, wants to launch American payloads. This new government agreement is supposed to facilitate both.

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