Category: Points of Information

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

One spiral galaxy eating another

9:51 am

One spiral galaxy eating another
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken by the Hubble Space Telescope as part of an on-going survey of known pecular-looking galaxies. This pair is believed to be 570 million light years away. From the caption:

Galaxies are composed of stars and their solar systems, dust and gas. In galactic collisions, therefore, these constituent components may experience enormous changes in the gravitational forces acting on them. In time, this completely changes the structure of the two (or more) colliding galaxies, and sometimes ultimately results in a single, merged galaxy. That may well be what results from the collision pictured in this image. Galaxies that result from mergers are thought to have a regular or elliptical structure, as the merging process disrupts more complex structures (such as those observed in spiral galaxies). It would be fascinating to know what Arp 122 will look like once this collision is complete . . . but that will not happen for a long, long time.

From our viewpoint, the spiral galaxy at the top appears warped by the gravitational pull of the face-on spiral at the bottom, as if it is being sucked into the bottom galaxy. In truth, both galaxies are pulling on each other. If we could circle around and see them in three dimensions we would almost certainly see distortions in the bottom spiral as well.

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Scientists: Suspended iron minerals floating in Venus’s atmosphere explain dark UV streaks

9:37 am

Venus as seen in ultraviolet by Mariner 10, February 5, 1974
Venus as seen in ultraviolet by Mariner 10,
February 5, 1974

The uncertainty of science: Since the mid-1970s scientists have been trying to figure out the cause of the dark streaks seen in the atmosphere of Venus when photographed in ultraviolet. The image to the right was the first such UV image, taken by Mariner 10 during its fly-by on its way to Mercury. These streaks are caused by some unknown material that absorbs the UV light.

Researchers have now proposed that two different iron-bearing minerals, floating in Venus’s atmosphere, are what cause these dark UV streaks. From the absract:

Our results demonstrate that ferric iron can react with sulfuric acid to form two mineral phases: rhomboclase [(H5O2)Fe(SO4)2·3H2O] and acid ferric sulfate [(H3O)Fe(SO4)2]. A combination of these two mineral phases and dissolved Fe3+ in varying concentrations of sulfuric acid are shown to be good candidates for explaining the 200- to 300-nm and 300- to 500-nm features of the reported unknown UV absorber.

Iron has been detected in the atmosphere previously, and is theorized could come from volcanic eruptions on the planet’s million-plus volcanoes.

This new hypothesis explaining the dark UV absorber however remains unconfirmed, and joins a list of other candidates for that absorber, many of which propose either iron or sulfur in different combinations. Because so little data really exists about the atmosphere of Venus, with what is known also uncertain, it is presently impossible to solve this mystery with confidence. The problem is made even more difficult in that scientists understand almost nothing about the chemistry of materials under the conditions seen in Venus’s atmosphere, which is extremely hot (800 degrees Fahrenheit) and very thick and dense (100 times that of Earth).

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NASA: UAE to build airlock module for lunar station plus have astronaut fly there

9:20 am

According to a press release from NASA today, the United Arab Emirates (UAE) will build the airlock module for the Lunar Gateway space station plus have one astronaut fly a mission to the station after it is built.

Under a new implementing arrangement expanding their human spaceflight collaboration with NASA through Gateway, MBRSC will provide Gateway’s Crew and Science Airlock module, as well as a UAE astronaut to fly to the lunar space station on a future Artemis mission.

I strongly suspect that the UAE will mostly pay for this module to be built, hiring outside contractors from either the U.S. or Europe to do the work.

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January 5, 2023 Quick space links

3:10 pm

Courtesy of BtB’s stringer Jay.

 

 

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Canyons formed from the giant crack that splits Mars

2:45 pm

Canyons formed by the giant crack that splits Mars
Click for original image.

Cool image time! The photo to the right, cropped, reduced, and sharpened to post here, was taken on September 22, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a complex of north-south trending canyons, with easternmost cliff about 400 feet high (though the full drop to the large canyon on its east is closer to 800 feet).

These canyons however have nothing to do with ice or water flow. They were formed by underground tectonic forces that pushed the ground upward, forced it to split and form cracks. Those cracks in turn produced these canyons. In some cases, such as the depression on top of the central ridge, the formation process probably occurred because fissures formed below ground, causing the surface to sag.

As always, the hiker in me wants to walk up the nose of that ridge and then along its western edge, with the western canyon on my left and that smaller depression on my right.

The larger context of this location is in itself even more spectacular.
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SpaceX sues to have NLRB complaint dismissed

10:31 am

SpaceX yesterday filed a lawsuit in the federal courts to have the employee complaint filed by the National Labor Relations Board (NLRB) dismissed as a violation of the company’s fifth and seventh amendment rights as well as article II of the Constitution.

You can read SpaceX’s lawsuit here [pdf]. It specifically lists as defendants the board members of the NLRB, as well as the unnamed administrative judge who will run the NLRB’s case, once it begins.

The SpaceX lawsuit is interesting in that it challenges the very legal structure that has established the NLRB, stating that its actions are illegal because that structure forbids the President from having full control over its actions, as required by article II of the Constitution.

Whether this lawsuit succeeds is of course unknown, but its quick filing tells us that SpaceX was prepared for this NLRB action, even before it was filed. It also tells us that the company now recognizes the overall threat to it by the Biden administration, which appears to be trying to weaponize every agency in the federal government to destroy the company, and is prepared to fight long and hard against this abuse of power.

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Researchers propose method for removing toxic perchlorates from Martian water

9:55 am

Of the twelve research grants just awarded by NASA to develop a variety of new technologies for astronomy and future space exploration, one proposes a new method for removing the toxic perchlorates that are thought to exist in all Martian water.

What if we could make the perchlorates just vanish? This is the innovative solution we propose here, taking advantage of the reduction of chlorate and perchlorate to chloride and oxygen being thermodynamically favorable, if kinetically slow. This is the promise of our regenerative perchlorate reduction system, leveraging synthetic biology to take advantage of and improve upon natural perchlorate reducing bacteria.

These terrestrial microbes are not directly suitable for off-world use, but their key genes pcrAB and cld, which catalyze the reduction of perchlorates to chloride and oxygen, have been previously identified and well-studied. This proposed work exploits the prior work studying perchlorate-reducing bacteria by engineering this perchlorate reduction pathway into the spaceflight proven Bacillus subtilis strain 168, under the control of a robust, active promoter. This solution is highly sustainable and scalable, and unlike traditional water purification approaches, outright eliminates perchlorates rather than filtering them to dump somewhere nearby.

Essentially the researchers will try to engineer bacteria known to be able to survive space so that it carries genes from another microbe able of changing the perchlorate into chloride and oxygen.

This study as well as the other eleven are only in phase one of their contracts, with the award of later phases determined by their initial successes or failures.

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Japan delays launch of Mars sample return mission due to problems with its H3 rocket

9:43 am

Japan’s space agency JAXA last week officially delayed the launch of its MMX Mars sample return mission, from later this year until the next Mars launch window in 2026.

A September 2024 launch would have seen MMX reach the Red Planet in August 2025 and return to Earth with around 0.35 oz (10 grams) of samples of the Mars moon Phobos in 2029. But the mission now must wait until the next Mars launch window opens in late 2026; its samples are slated to reach Earth in 2031.

The delay is because of JAXA’s ongoing problems getting its new H3 rocket off the ground. The first test launch last year failed, and though the next launch attempt is now scheduled for February, the agency decided it wanted more time to prove out the rocket before putting the Mars mission on it.

This decision once again highlights the overall failure of JAXA to produce for Japan a viable space effort. It is long past time for the Japanese government to take control from this agency, and allow the private sector to compete freely for business. Right now Japan’s continuing failures in space are downright embarrassing, compared to its Asian neighbors of China, India, and South Korea.

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NASA and one private company respond to Navaho nation’s demand to cancel lunar mission

9:32 am

Both NASA and one of the private companies involved in ULA’s first Vulcan rocket launch on January 8, 2023 that will carry the Astrobotic’s Peregrine lunar lander to the Moon have now responded to the Navaho nation, which has stated its religion gives it the unlimited right to decide what can go there.

Navaho President Buu Nygren had claimed earlier this week that the “Moon is sacred to numerous Indigenous cultures” and the payloads of human ashes being sent to the Moon was “tantamount to desecration.” He demanded the mission be delayed or canceled.
» Read more

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China’s Kuaizhou-1A solid-fueled rocket launches four weather satellites

9:09 am

China today successfully completed its first launch in 2024, its Kuaizhou-1A solid-fueled rocket lifting off from its Jiuquan spaceport in northwest China carrying four weather satellites.

No information was released about where the rocket’s lower stages crashed inside China. Nor did China’s state run press provide any information on the payloads, other than to say they will most be “used to provide commercial meteorological data services.”

The 2024 launch race:

2 SpaceX
1 India
1 China

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January 4, 2024 Quick space links

3:59 pm

Courtesy of BtB’s stringer Jay.

 

 

 

 

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John Batchelor highlights Genesis: The Story of Apollo 8

1:19 pm

At 11 pm (Eastern) during the third hour of John Batchelor’s show tonight and tomorrow he will air a long two hour interview with me discussing my book Genesis: The Story of Apollo 8. After many years he finally decided his listeners deserved a full discussion of what is to many the most historically important Apollo mission to the Moon. It might not have landed on the Moon but what the astronauts accomplished and said changed the nation, and will likely be remembered forever.

Tune in if you are interested. Even better, consider reading the book. In fact, the best thing of all would be to give the book to any high school students in your family. They will learn more about American history and the Cold War by reading it than they get nowadays from their entire public school education.

I will also embed the podcasts here when they become available.

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The mining potential on Mars

11:01 am

The mining potential on Mars
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on October 30, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Labeled simply as a “terrain sample,” it was probably taken not as part of any specific research project but to fill a gap in the schedule in order to properly maintain the camera’s temperature.

Nonetheless, the larger region where this photo is located is one of great interest to scientists as well as to future explorers. First note the colors. The wide variations between the bright orange of that peak (only a few tens of feet high) and the light orange and aqua-green of the bedrock to the north and south suggest a terrain with a lot of different materials within it.

The location is in the dry equatorial regions, so the swirls visible on the plateaus north and south of that small peak are not related to near surface ice. Instead, this is warped bedrock, with those swirls also suggesting material of a varied nature, exposed to the surface by erosion processes.
» Read more

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Hubble detects changes in atmosphere of exoplanet

10:16 am

Using data from collected in 2016, 2018, and 2019 combined with computer simulations, scientists now believe they have detected changes in the atmosphere of the exoplanet WASP-121b, also nicknamed Tylos.

The Jupiter-sized planet orbits a star about 880 light years away.

WASP-121 b is so close to its parent star that the orbital period is only 1.27 days. This close proximity means that the planet is tidally locked so that the same hemisphere always faces the star, in the same way that our Moon always has the same side pointed at Earth. Daytime temperatures approach 3,450 degrees Fahrenheit (2,150 degrees Kelvin) on the star-facing side of the planet.

The team used four sets of Hubble archival observations of WASP-121 b. The complete data-set included observations of WASP-121 b transiting in front of its star (taken in June 2016); WASP-121 b passing behind its star, also known as a secondary eclipse (taken in November 2016); and the brightness of WASP-121 b as a function of its phase angle to the star (the varying amount of light received at Earth from an exoplanet as it orbits its parent star, similar to our Moon’s phase-cycle). These data were taken in March 2018 and February 2019, respectively.

A computer model was then used to fill in the gaps and provide a simulation of the hot temperatures of that exoplanet’s atmosphere over time. Two videos of that simulation are available at the link.

There of course is a lot of uncertainty in this result, though the fundamental discovery of changes is important. This data proves there is weather on such alien planets, even if that weather is so alien we really don’t understand it in the slightest based on the available data on hand.

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SpaceX launches commercial communications satellite

9:27 pm

SpaceX today successfully launched a commercial geosynchronous communications satellite, its Falcon 9 rocket lifting off from Cape Canaveral.

The first stage successfully completed its tenth flight, landing back at Cape Canaveral. The fairings completed their ninth and fourteenth flights respectively.

The 2024 launch race:

2 SpaceX
1 India

No one else has launched as yet, though many launches are scheduled through the first ten days of January.

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January 3, 2024 Quick space links

3:39 pm

Courtesy of BtB’s stringer Jay. I am probably taking most of the rest of the day off, having just gotten back from cataract surgery on one eye. No problems, but I don’t have a lot of energy right now. If I perk up something might happen, but I can’t say if that will be the case.

 

 

 

 

 

 

 

 

 

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SpaceX launches six next generation Starlink satellites

9:09 pm

SpaceX tonight completed its first launch in 2024, its Falcon 9 rocket lifting off from Vandenberg in California and putting six next generation Starlink satellites into orbit.

The first stage completed its first flight, successfully landing on the drone ship in the Pacific. The fairings successfully completed their eleventh and ninth flights, respectively. This was the first new stage introduced since August 2023, and continues SpaceX’s pattern of adding about two new first stage boosters per year.

The six Starlink satellites are designed to work directly with the cell phones that people already use, thus increasing the customer base available for the product. As the first generation of this design, it is expected that there will be upgrades with later launches.

At this moment India and SpaceX are the only two entities to launch in 2024, each once.

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January 2, 2023 Quick space links

3:05 pm

Courtesy of BtB’s stringer Jay.

 

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Dunes on the floor of Valles Marineris

2:17 pm

Overview map

Dunes on the floor of Valles Marineris
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on September 26, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a field of scattered elongated dunes on a flat older surface with craters and what appear to be smaller ripple dunes (in the lower left). The large elongated dunes tend to be oriented in an east-west manner, while the older tiny ripple dunes appear to have a north-south orientation.

Very clearly the larger dunes appear to be traveling across that flat older surface, though whether there is any documented movement is unknown. Generally (though there are exceptions) scientists have found most of the dunes on Mars to be either inactive, or if they are moving because of the wind that movement is very tiny per year. In this case there is one dark spot on the dunes, near the center of the picture, where it appears a collapse might have occurred, suggesting recent change.

On the center right of the picture is the end point of a long ridgeline extending 10 to 12 miles to the east and rising about 7,300 feet, as shown in the overview map above. The small rectangle in the inset shows the area covered by the photograph.

At the base of that ridgeline can be seen a series of terraces descending to the west, suggesting that this hill might be volcanic in nature, with each terrace indicating a separate lava flow. The location is in the dry equatorial regions, so near-surface ice is likely not an explanation.

In the inset the mountain wall to the north is the large mountain chain that bisects this part of Valles Marineris. It overwhelms this small 7,300-foot-high ridge, rising more than 22,000 feet from these dunes with its high point still one or two thousand feet below the rim of Valles Marineris itself.

Once again, the grand scenery of Mars amazes. Imaging hiking a trail along that ridgeline, with the mountains rising far above you to the north and south.

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First Juno images of Io from December 30th fly-by

9:51 am

Io as seen by Juno on December 30, 2023
For original global image go here. For original of inset go here.

The first raw Juno images taken of the Jupiter moon Io during its close fly-by on December 30, 2023, the closest in more than twenty years, have been released by the science team and citizen scientists have begun processing them.

The global picture to the right, rotated and reduced to post here, was processed by Kevin Gill. The inset of the volcanic mountains near the terminator was processed by Thomas Thomopoulos. As he notes, to obtain better detail he enhanced the colors and image and then zoomed in.

In the inset, note the northeast flows coming off the two mountains near the center. With the lower mountain, this flow appears to lie on top of a larger flow that extended out almost to the mountain to the right.

Io is a planet of continuous volcanic activity. For example, when the global image above was taken, the plume of a volcano eruption was visible on the right horizon, as shown in this version, its exposure adjusted by Ted Stryk. Catching such eruptions on Io is not unusual, considering its continuous volcanic activity generated by the tidal forces the planet undergoes from its orbit around Jupiter. In fact, the very first plume was imaged in 1979 by Voyager 1 during its short fly-by, and proved a hypothesis of such activity that scientists had only published one week earlier.

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India completes first launch of 2024

8:50 am

India’s space agency ISRO early today completed the first launch of 2024, its PSLV rocket placing an X-ray telescope into orbit along with ten payloads on its fourth stage, which is functioning as an orbital tug. Most appear [pdf] to be experiments that will remain on board, but one is an amateur radio smallsat that might be released.

As this is the only launch so far in 2024, India leads the race. It will certainly not remain the leader.

My annual global launch report for 2023 will be published tomorrow, after the holiday.

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China launches “test satellite for satellite internet technologies”

8:34 pm

China today launched what it described as “a test satellite for satellite internet technologies,” its Long March 2C rocket lifting off from its Jiuquan spaceport in the northwest of China.

No word on where the lower stages crashed, both of which use very toxic hypergolic fuels. Nor was there any additional information about the satellite, though the description suggests this is a prototype satellite for a Starlink-type constellation, several of which China’s government has proposed building.

The leaders in the 2023 launch race:

96 SpaceX
66 China
19 Russia
8 Rocket Lab
7 India

American private enterprise still leads China in successful launches 110 to 66, and the entire world combined 110 to 103. SpaceX in turn trails the rest of the world (excluding other American companies) 96 to 103.

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December 29, 2023 Quick space links

3:01 pm

Courtesy of BtB’s stringer Jay.

 

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SpaceX successfully completes static fire tests of both Superheavy and Starship

12:37 pm

SpaceX today successfully completed static fire tests on both Superheavy and Starship prototypes intended to fly on its next orbital test flight.

The video at the link is four hours long. The Starship engine burn occurs at 1 hour 15 minutes and lasts about five seconds. The Superheavy burn takes place at 2 hours 42 minutes, and lasts about ten seconds. Both burns appeared to operate exactly as planned, though obviously an inspection of the launchpad under Superheavy will have to take place to see if its deluge system operated as intended.

Once again, SpaceX is demonstrating that it will be ready to go for the third orbital test launch of this rocket in mere weeks. Based on these tests today as well as past operations, it seems that all the company needs to do now is stack Starship on top of Superheavy, do another dress rehearsal countdown, and then go.

It won’t however. There is no word from the FAA on when it will issue a launch permit. Based on the previous launch, it will likely not issue the permit when SpaceX says it has completed its investigation of the last launch and is ready to fly again. Instead it will take another month or two writing up its own report (which will essentially reword what SpaceX has told it). Then, once the FAA is finished only then will the Fish and Wildlife Service begin to write up its report (as happened in the fall), causing further delays.

I repeat my prediction from November: No launch until March, at the earliest. The federal government continues to stand in the way of progress, and freedom.

Hat tip to BtB’s stringer Jay.

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The ancientness of rocks on Mars

10:31 am

Ancient rocks on Mars
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and enhanced to post here, was taken on December 27, 2023 by the high resolution camera on the Mars rover Curiosity. It shows what is a somewhat typical rock found on the ground as Curiosity climbs Mount Sharp in Gale Crater.

Two features stand out. First, the many layers illustrate again the cyclical nature of Martian geology. Many sedimentary events occurred over a long time to create this rock, each cycle putting down a new layer, with some intervening time periods possibly removing layers as well. Such layering has now become evident in both ground photos taken by rovers as well as orbital images.

Second, the delicate nature of some layers indicates the incredibly slow erosion process on Mars, enhanced by the red planet’s one-third gravity. The atmosphere is incredibly thin, less than 0.1% of Earth’s. Yet given time the wind had been able to wear away the edges of this rock. The thin atmosphere and light gravity has also allowed some material to remain in a delicate manner that would be impossible on Earth.

Thus, for these thin flakes to have formed has required a great deal of time. The very nature of this rock speaks of an ancient terrain, shaped slowly by inanimate processes with no active life around to disturb things.

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Curiosity science team releases movies of Mars from dawn to dusk

9:32 am

Using its front and rear hazard avoidence cameras, the Curiosity science team had the rover take two full sets of images looking in one direction for twelve hours straight in order to create two movies of Mars that show an entire day, from dawn to dusk.

I have embedded both movies below. From the press release:

When NASA’s Curiosity Mars rover isn’t on the move, it works pretty well as a sundial, as seen in two black-and-white videos recorded on Nov. 8, the 4,002nd Martian day, or sol, of the mission. The rover captured its own shadow shifting across the surface of Mars using its black-and-white Hazard-Avoidance Cameras, or Hazcams.

Instructions to record the videos were part of the last set of commands beamed up to Curiosity just before the start of Mars solar conjunction, a period when the Sun is between Earth and Mars. Because plasma from the Sun can interfere with radio communications, missions hold off on sending commands to Mars spacecraft for several weeks during this time.

The first looks forward, into Gediz Vallis, where Curiosity will eventually travel. The second looks back down Mt Sharp and out across the rim of Gale Crater.
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