Author: Robert Zimmerman

Dimorphus is dry, based on data obtained before and after DART hit it

10:52 am

Data collected by the ground-based Very Large Telescope (VLT) in Chile before and after the impact by the DART probe in September 2022 has revealed that the rubble-pile asteroid Dimorphos is very dry, with little or no water.

[The astronomers] observed the Didymos–Dimorphos system on 11 occasions, from just before the impact to about a month afterwards. MUSE [one of VLT’s instruments] is able to split the light from the double-asteroid into a spectrum, or rainbow, of colors, to look for emission at specific wavelengths that corresponds to specific molecules. In particular, Opitom’s team searched the ejecta for water molecules and for oxygen that could have come from the break-up of water molecules by the impact. However, no evidence of water was detected. Dimorphos, at least, seems to be a dry asteroid.

You can read the paper here.

Some theories prior to DART’s impact suggested that there could be ice within some inner solar system asteroids. Finding none instead suggests that inner solar system asteroids are very distinct and different from the icy comets and asteroids either coming from or orbiting in the outer solar system.

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Webb detects “hot sand clouds” in atmosphere of exoplanet

10:40 am

Using the Webb Space Telescope, astronomers have detected “hot sand clouds” in atmosphere of exoplanet 40 light years away, along with evidence of water, methane, carbon monoxide, carbon dioxide, sodium, and potassium.

You can read the paper here [pdf]. The exoplanet itself appears to have some features that resemble that of a brown dwarf, or failed star, instead of an exoplanet.

Although VHS 1256 b is more on the heavier side of the known exoplanets, its gravity is relatively low compared to more massive brown dwarfs. Such very low-mass stars can only burn deuterium for a relatively short duration. Consequently, the planet’s silicate clouds can appear and remain higher in its atmosphere, where the JWST can detect them. Another reason its skies are so turbulent is the planet’s age. In astronomical terms, it is pretty young. Only 150 million years have passed since it formed. The planet’s heat stems from the recent formation process – and it will continue to change and cool over billions of years.

The sand clouds are hot, in the range of 1,500 degrees Fahrenheit.

These results were obtained as part of an early-release program from Webb, and illustrate the potential of the infrared space telescope for learning many specific details about brown dwarfs and exoplanets.

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Russia’s Luna-25 unmanned lunar lander to be delivered to Vostochny in early June

10:23 am


Click for interactive map.

According to Russia’s state-run press, its Luna-25 unmanned lunar lander will finally be delivered to its launchsite in Vostochny in the first ten days of June 2023, after many years of delays.

The press announcement made no mention of a launch date after delivery, though according to an earlier report Roscosmos is aiming for a July 13, 2023 launch date.

The landing site on the Moon is Boguslawsky crater, as indicated by the green dot on the map to the right. If it occurs as planned, it will join three other landers now targeting 2023 lunar landings, Ispace’s Hakuto-R1, Intuitive Machines Nova-C, and India’s Chandrayaan-3, with three of four landing in the Moon’s south pole regions. The white cross marks the location of the south pole itself, on the rim of Shackleton Crater.

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Virgin Orbit resumes limited operations

10:12 am

In anticipation of a possibly deal to save the company, Virgin Orbit officials have resumed limited operations, bringing back a small number of employees to work on crucial issues required for its next launch.

“Our first step will begin Thursday of this week, when we plan to return a subset of our team to focus on critical areas for our next mission,” Virgin Orbit said in a statement. “We are looking forward to getting back to our mission and returning to orbit.”

…Reuters reported that Virgin Orbit is working on a $200 million infusion from Texas-based venture capital investor Matthew Brown via a private share placement, citing a term sheet. Following a meeting by Virgin Orbit’s board on Tuesday, the two sides plan to close the deal on Friday, according to the non-binding term sheet, Reuters said.

Should the company resume full operations and launch again, I am certain it will not launch from the United Kingdom, at least not until the UK has fixed its launch licensing bureau, the Civil Aviation Authority, which took so long to approve Virgin Orbit’s launch from Cornwall it practically bankrupted the company.

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Hakuto-R1 enters lunar orbit

10:05 am

Lunar map showing Hakuto-R1's landing spot
Hakuto-R1’s planned landing site is in Atlas Crater.

The lunar lander Hakuto-R1, privately-built by the Japanese company Ispace, has now successfully entered lunar orbit in anticipation of its landing sometime next month.

Tokyo-based ispace said that its HAKUTO-R Mission 1 lander entered orbit at 9:24 p.m. Eastern March 20 after a burn by its main engine lasting several minutes. The company did not disclose the parameters of the orbit but said that the maneuver was a success.

…Entering orbit is the seventh of 10 milestones ispace set for the mission that started with launch preparations. The final three milestones are completing “orbital control maneuvers,” the landing itself and going into a steady state of activities after landing.

The spacecraft carries several payloads, the most significant of which is the United Arab Emirates Rashid rover.

If Hakuto-R1 completes its 10 milestones successfully, it will lay the groundwork for Ispace’s second Hakuto-R mission to the Moon in 2024, and an even larger lander on a third mission to follow, this time built in partnership with the American company Draper and carrying NASA payloads.

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Betsy Palmer, Robert Goulet, & Bess Myerson – “I’ve got a secret”

6:01 pm

An evening pause: A slightly different pause tonight from a 1964 episode of the quiz show “I’ve got a secret.” Can you guess where the dialogue comes from that they perform at the opening of this segment, before they tell you? Also keep watching for a more accurate rendition, all done in a bit of silly good-natured fun.

Hat tip Diane Zimmerman, who recognized it instantly.

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Today’s blacklisted American: Vermont’s organization of principals bans Christian school for being Christian

1:16 pm

Mid Vermont Christian School: banned for supporting Christianity

They’re coming for you next: One month after administrators of Mid Vermont Christian School decided to default a game against a public high school girls team that had a boy in woman’s clothing as a player, citing safety and religious concerns, the Vermont Principals’ Association moved to ban that Christian school from all sports and sponsored activities.

Jay Nichols, the executive director of the Vermont Principals’ Association, said the organization’s 15-member executive board was unanimous in its decision. “If you don’t want to follow VPA rules, that’s fine,” Nichols said. “But then you’re just not a VPA member. It’s fairly simple. That’s really all we’re gonna really say about it.” [emphasis mine]

In its letter to Mid Vermont Christian, the VPA stated “…the school’s actions do not meet the expectations of the VPA’s 1st and 2nd policy, Commitment to Racial, Gender-Fair, and Disability Awareness and Policy of Gender Identity, respectively.”

If you want to know in detail what VPA’s 1st and 2nd policies are, you can read them here. The key quote is this:
» Read more

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A half-mile high Martian cliff on the verge of collapse

11:27 am

A half-mile Martian cliff on the verge of collapse
Click for original image.

Cool image time! The picture to the right, cropped and reduced to post here, was taken on December 24, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows erosion gullies coming down off a mountain side, just north of a massive cliff that I estimate to be around 2,000 to 3,000 feet high.

Note the north-south-trending cracks. These suggest that this entire half-mile-high cliff face is slumping downward, cracking as it does so. The cracks at the start of the high flat-topped thumb-shaped mesa near the image bottom are especially intriguing. They suggest that this entire mesa might eventually separate and give way.

There is a specific reason this cliff face is slumping, as shown in the overview map below.
» Read more

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South Korean private rocket startup completes first suborbital rocket test

9:12 am

Innospace, a South Korean private rocket startup, on March 19, 2023 successfully completed the first test flight of a suborbital prototype, launching from Brazil’s Alcantara Launch Center.

The rocket flew for 4 minutes and 33 seconds before falling into the designated safety zone. The engine lasted for 106 seconds, which fell short of the previously planned 118 seconds, yet its performance was stable, according to Innospace. Hanbit-TLV, the test vehicle, is a 16.3-meter (53.5-foot) single-stage rocket designed to verify the performance of a 15-ton-thrust rocket engine developed by Innospace.

The company will now develop its full-scale orbital rocket, dubbed Hanbit-Nano, “capable of carrying 50-kilogram (110-pound) payload into space, equipped with a 15-ton-thrust hybrid engine powered by solid fuel and liquid oxidizer.” A 2024 launch is the goal, possibly from a new commercial spaceport in Norway.

More information here. The rocket also carried a payload for the Brazilian military, which is why by contract Innospace officials could not release the exact altitude reached by the rocket.

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A verde valley on Mars

12:59 pm

A verde valley on Mars
Click for original image.

In the southwest where I live, a valley dubbed “verde” (which means “green” in Spanish) is generally a place with a somewhat persistent river with lots of lush plant life. The Verde Valley in Arizona is the perfect example, with “close to 80% of the valley’s land … national forest.”

On Mars there is also a verde valley, but the name is not descriptive in the least. The picture to the right, rotated, cropped, and reduced to post here, was taken on January 22, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO) and shows one section of the Martian Verde Vallis, draining south to north.

The dark rippled patches inside this shallow canyon are sand dunes. In fact, though MRO has not taken many high resolution images of Verde Vallis, every one shows the valley with further patches of ripple dunes. See for example this image of a section of the valley just a bit farther north.
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Pushback? University of North Carolina pretends to ban ‘diversity, equity and inclusion’ requirements in hiring

11:51 am

Failure Theater!

They’re coming for you next: On February 23, 2023 the board of governors of the University of North Carolina voted to ban all requirements that applicants in hiring and admissions make statements advocating the racist political agenda of “diversity, equity and inclusion” [DEI].

The board stated the university “shall neither solicit nor require an employee or applicant for academic admission or employment to affirmatively ascribe to or opine about beliefs, affiliations, ideals, or principles regarding matters of contemporary political debate or social action as a condition to admission, employment, or professional advancement,” according to the resolution. An employee or applicant also can’t “be solicited or required to describe his or her actions in support of, or in opposition to, such beliefs, affiliations, ideals, or principles.”

According to the now-banned policy [pdf], anyone who wanted to either go to UNC as a student, or be hired or promoted there as a teacher, had to prove they had made a “positive contribution to DEI efforts.”
» Read more

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Blobs and jellyfish in space

10:00 am

Blobs and Jellyfish
Click for original image.

Cool image time! The picture to the right, cropped and reduced to post here, was taken by the Hubble Space Telescope and released today.

The galaxy JW100 features prominently in this image from the NASA/ESA Hubble Space Telescope, with streams of star-forming gas dripping from the disc of the galaxy like streaks of fresh paint. These tendrils of bright gas are formed by a process called ram pressure stripping, and their resemblance to dangling tentacles has led astronomers to refer to JW100 as a ‘jellyfish’ galaxy. It is located in the constellation Pegasus, over 800 million light-years away.

Ram pressure stripping occurs when galaxies encounter the diffuse gas that pervades galaxy clusters. As galaxies plough through this tenuous gas it acts like a headwind, stripping gas and dust from the galaxy and creating the trailing streamers that prominently adorn JW100. The bright elliptical patches in the image are other galaxies in the cluster that hosts JW100.

The image was part of a research project studying star formation in the tendrils of jellyfish galaxies.

The blob near the top of the image is another galaxy in this same galaxy cluster. It is an elliptical galaxy that also happens to have two central nuclei, caused when two smaller galaxies merged. The central regions of each have not yet merged into one.

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SpaceX launches two SES communication satellites

5:50 pm

Only a few hours after SpaceX launched 52 Starlink satellites from California, the company successfully launched two communications satellites for the Luxembourg company SES, using its Falcon 9 rocket launching from Cape Canaveral.

The first stage completed its sixth flight, landing safely on a drone ship in the Atlantic. The rocket’s two fairings completed their third and seventh flights, respectively.

The leaders in the 2023 launch race:

19 SpaceX
11 China
4 Russia
2 Rocket Lab

American private enterprise now leads China 21 to 11 in the national rankings of this year’s launches, and the whole world combined 21 to 17. SpaceX by itself is tied with the rest of the world, including other American companies, 19 to 19.

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Starship launch still stalled by FAA

3:47 pm

According to a tweet by Elon Musk today, Starship will be ready for its first orbital test launch in a few weeks.

Musk also noted however that SpaceX is still awaiting the FAA’s launch license, and because of this he now expects the launch in the third week in April.

Why it is taking months for the FAA to issue this license is disturbing, and suggests that under the Biden administration the feds are behaving more and more like the incompetent Civil Aviation Authority in the UK, which stonewalled Virgin Orbit’s launch for months so that the company now sits on the verge of bankruptcy.

Hat tip to BtB’s stringer Jay for this story, who will be gone for the next two weeks on vacation. Have fun Jay.

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Pushback: Smithsonian ordered to no longer violate the First Amendment

3:36 pm

The evil hat that Air & Space banned
The evil hat that Air & Space officials banned

Pushback: The Smithsonian Institution, which runs the Air & Space museum as well as other museums in Washington, D.C., has been ordered by the courts to stop violating the First Amendment, as it did when on January 20, 2023 it harassed and ejected students from a pro-life group, there as part of their participation in the annual March for Life demonstration, because they were wearing wool caps that said “pro-life” on them.

According to the consent order [pdf], the Smithsonian expressed “regret” for the event and promised to “remind all security officers stationed at NASM [National Air & Space Museum] of the rights of visitors.”

The order however does not simply accept the museum’s expression of regret. It specifically enjoins the Smithsonian and its employees “from prohibiting visitors to the Smithsonian’s National Air and Space Museum from wearing hats or other clothing with messages, including religious and political speech” and requires it to distribute the consent order to “all security officers stationed at NASM, as well as other Smithsonian personnel who interact with the public, including volunteers and museum staff, within 7 days.” It also orders the museum to tell its security officers that their behavior on January 20th was wrong.
» Read more

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SpaceX launches another 52 Starlink satellites

2:58 pm

SpaceX today successfully put another 52 Starlink satellites into orbit using its Falcon 9 rocket launching from Vandenberg Space Force Base in California.

The first stage completed its 8th flight, landing on a drone ship in the Pacific.

A second SpaceX launch today, this time from Cape Canaveral, Florida, is set to launch very shortly, so the leader board for the 2023 launch race will also change as well:

18 SpaceX
11 China
4 Russia
2 Rocket Lab

American private enterprise now leads China 20 to 11 in the national rankings, and the entire globe combined 20 to 17. SpaceX now trails the entire world, including American companies. 18 to 19.

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The ubiquitous presence of ice in the Martian mid-latitudes

1:01 pm

Ice in the Martian mid-latitudes
Click for original image.

Cool image time! The picture to the right, rotated, cropped, rotated, and sharpened to post here, was taken on November 28, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Labeled merely as a “crater with mesa”, it gives us another example of the presence of glacial ice in the mid-latitudes of Mars.

That mesa is what planetary scientists have labeled “concentric crater fill,” a glacial feature found in numerous craters throughout the mid-latitude bands from 30 to 60 degrees latitude. The ground in the terrain surrounding the crater could be also be impregnated with ice, but based on the location as shown in the overview map below, it is just as likely to be lava.

In fact, the location of this particular crater illustrates why concentric crater fill might become the best source of ice for future colonists.
» Read more

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Both India’s Chandrayaan-3 and Intuitive Machine’s Nova-C lunar landers pass vibration tests

9:21 am


Click for interactive map.

According to separate announcements just released, both India’s Chandrayaan-3 lander/rover and Intuitive Machine’s private Nova-C lunar lander have passed their last ground tests and are now ready for launch to the Moon later this year.

India’s space agency ISRO successfully completed testing of its Chandrayaan-3 lunar lander/rover in early March, completing vibration tests of the spacecraft and proving it will be able to survive the stresses during launch. The spacecraft successfully completed radiation testing in February.

ISRO is now targeting June 2023 for Chandrayaan-3’s launch.

Intuitive Machines meanwhile announced yesterday that its Nova-C lander has completed vibration testing, and is ready for launch later this year.

The map to the right shows the landing sites of these planned landers near the Moon’s south pole (indicated by the white cross), as well as Russia’s long-delayed lunar lander, Luna-25, which is now targeting a July launch.

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Astra asks for more time from Nasdaq before its stock is delisted

8:54 am

The rocket startup Astra has now asked Nasdaq to give it an extra six months beyond the early April deadline to get its stock price above $1 in order to avoid getting delisted from the stock market.

With its share price at $0.42 upon closing Thursday, Astra Chief Financial Officer Axel Martinez wrote in a blog post that the space company formally requested on Monday another six-month window to raise the share price above $1 for 10 consecutive business days as required to stave off a delisting.

It appears the company might be considering a reverse-stock split, whereby stocks are combined with the total number reduced, thus artificially raising the stock price. Nasdaq will consider this tactic an acceptable solution, though it is also considered a last-ditch approach.

Right now Astra is no longer an operational rocket company, having discontinued its Rocket-3 rocket. It says it is developing a new rocket, dubbed Rocket-4, but whether it can get this operational before it runs out of money or gets delisted remains unknown.

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Rocket Lab and China launch satellites successfully

8:40 am

Both the American company Rocket Lab and China have successfully placed satellites in orbit in the past day.

First, Rocket Lab successfully placed two Earth observation satellites for the company Capella yesterday. This was also its second launch from Wallops Island in Virginia. The company made no attempt to recover the first stage.

Next, China today used its Long March 3B rocket to place its own Earth observation satellite into orbit from its Xichang spaceport, located in the country’s northeast but far from the ocean. No word on whether the rocket’s first stage and four strap-on boosters crashed near habitable areas.

The leaders in the 2023 launch race:

17 SpaceX
11 China
4 Russia
2 Rocket Lab

For the rest of the year, I will only list the leaders with each launch update. At this moment, American private enterprise leads China 19 to 11 in the national rankings, and the entire world combined 19 to 17. SpaceX alone now trails the rest of the world combined, including American companies, 17 to 19.

These numbers will likely change later today, as SpaceX has two launches scheduled in just a few hours. One launch will place two communications satellites in orbit for the Luxembourg company SES. The other will launch another 52 Starlink satellites.

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Endless ripple dunes in Mars’ third largest impact basin

2:24 pm

Ripple dunes in Mars' third biggest impact basin
Click for original image.

Cool image time! The picture to the right, cropped to post here, was taken on November 30, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

The section cropped shows only a small portion of the endless ripple dunes seen in this area. The color strip provides us some interesting other details as well as mysteries. The orange indicates dust on the ridges as well as the higher terrain near the center of the picture. The green in the hollows as well as to the east and west suggests coarser materials that have settled in lower elevations. This supposition is reinforced by the orange area near the bottom of the picture where the ripples have mostly dissipated. This is a high spot, and we appear to be looking at a dusty surface. (This impression is clearer in the full image.)

The latitude is high, 48 degrees south, but as far as I know orbital images have not found a lot of ice evidence in this part of Mars.
» Read more

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Today’s blacklisted American: Rhode Island school district blacklists Christian afterschool club because it is Christian

1:24 pm

Rhode Island: haven to oppression
Oppressive Rhode Island

They’re coming for you next: The Providence school district in Rhode Island has now been sued by the Child Evangelism Fellowship (CEF) for unfairly blacklisting CEF’s afterschool Good News clubs from using school facilities for meetings,

For nearly two years, the Providence Public School District has blocked CEF Rhode Island from hosting its elementary school Good News Clubs on district school facilities. However, other organizations such as Boys and Girls Clubs, Boy Scouts, Girl Scouts, YMCA, and Girls on the Run are given free use of school facilities for after school programs.

Note too that the school district had already approved CEF’s Good News clubs in 2019. According to the lawsuit [pdf], filed by the non-profit legal firm Liberty Counsel:

The District approved CEF Rhode Island’s August 2019 Rental of School Facilities application, allowing CEF Rhode Island to lead an afterschool Good News Club at William D’Abate Elementary School for the 2019–2020 school year, without any facility rental fee. Forty-eight children signed up for the club, but the club could only accommodate twenty children due to space limitations at the school.

» Read more

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Student cubesat demonstrates how to use a solar sail for satellite deorbit

10:04 am

Using cheap off-the-shelf parts students at Brown University have successfully tested a simple solar sail in space and shown how it can be used to de-orbit satellites efficiently and inexpensively.

They built a satellite on a shoestring budget and using off-the-shelf supplies available at most hardware stores. They even sent the satellite — which is powered by 48 Energizer AA batteries and a $20 microprocessor popular with robot hobbyists — into space about 10 months ago, hitching a ride on Elon Musk’s SpaceX rocket.

…The students added a 3D-printed drag sail made from Kapton polyimide film to the bread-loaf-sized cube satellite they built. Upon deployment at about 520 kilometers — well above the orbit of the International Space Station — the sail popped open like an umbrella and is helping to push the satellite back down to Earth sooner, according to initial data. In fact, the satellite is well below the other small devices that deployed with it. In early March, for instance, the satellite was at about 470 kilometers above the Earth while the other objects were still in orbit at about 500 kilometers or more.

Based on the data, it is expected the cubesat will burn up in the atmosphere in five years, not twenty-five or so predicted for the other cubesats launched to the same orbital elevation.

This experiment above all proves that most of the very expensive demo missions to test this kind of technology have been grossly over-budget. The entire cost of this student-built project was just $10,000, and it actually was more successful in proving this technology than a number of past solar sail projects that cost millions.

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Another study finds evidence of active volcanism on Venus

9:52 am

Changes in volcanic vent on Venus over eight months
Click for original image.

Using archival data from the Magellan spacecraft that orbited Venus in the early 1990s scientists think they have identified an active vent that appeared to change shape based on radar images taken eight months apart.

From the abstract of their paper:

We examine volcanic areas on Venus that were imaged two or three times by Magellan and identify a ~2.2 km2 volcanic vent that changed shape in the eight months between two radar images. Additional volcanic flows downhill from the vent are visible in the second epoch images, though we cannot rule out that they were present but invisible in the first epoch due to differences in imaging geometry. We interpret these results as ongoing volcanic activity on Venus.

This result is different that other research released last month that used Magellan data to identify geological features on Venus most likely to be active. In today’s results the scientists think they have spotted an actual volcanic eruption, as shown in the two images to the right. The image is taken from Figure 2 of the paper, with the changes in the center bottom vent clearly visible.

There is much uncertainty in these results that must be mentioned. The images are not optical but radar, so the scientists had to do a lot of computer processing to get the final result. They also compared this work with computer simulations to help confirm their conclusions.

The results also leave open the question of the total amount of volcanism presently active on Venus. As the scientists note in their conclusion, “With only one changed feature, we cannot determine how common currently active volcanism is on Venus.”

Nonetheless, the research using both new and archival data in the past thirty years is increasingly telling us that there is some active volcanism on Venus, hidden beneath its thick hellish cloudy atmosphere.

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Reassessed fuel measurements give Mars Odyssey until 2025 before it runs out

9:28 am

Using more refined methods for measuring the fuel left on Mars Odyssey, the oldest orbiter circling Mars at this time, engineers have determined that it will not run out until 2025, not this year as previously thought.

Mars Odyssey has been in orbit around Mars since 2001. The fuel is used by thrusters to help maintain the spacecraft’s orientation, which is mostly done by reaction wheels, or gyroscopes. We should therefore not be surprised if by 2025 engineers figure out a way to get the reaction wheels to do the whole job, when the fuel runs out.

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