Chandra in safe mode

The Chandra X-ray Observatory last week experienced a loss of power that caused engineers to put the science instruments on the space telescope into safe mode while they investigate the problem.

No further information is presently available.

Chandra has been in orbit since 1999, and is now on an extended mission through 2025. It would be a great tragedy if it failed now, just as the infrared Webb telescope is about to begin operations. The two space telescopes are complementary.

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Cracking ice on Mars?

Cracking ice on Mars?
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken on December 7, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what the MRO science team dubs “erosion of scalloped terrain” in the northern lowland plains of Mars.

The cracks invoke the polygon cracks one sees in mud as it dries. The circular feature suggests a buried crater whose shape is merely suggested because the cracks are conforming to the underground topography.

Are we looking at dried mud? Maybe, but more likely we are seeing a sheet of ice now sublimating away and cracking as it does so. If you look at the full photo you will see the cracked material also appears to drape itself over several nearby low ridges, something that seems more likely from ice than mud.

The overview map below also suggests this is a buried layer of ice.
» Read more

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Pushback: Three school board members recalled in San Francisco

London Breed, mayor of San Francisco
San Francisco’s Democratic Party mayor London Breed,
who now takes full control of school board.

Vote the bums out! Voters in San Francisco yesterday ousted three members of the city’s seven-member school board members because of their focus on renaming schools honoring American heroes like Washington and Lincoln while refusing to reopen the city’s schools or deal with its budget issues.

School board president Gabriela López, vice president Faauuga Moliga and commissioner Alison Collins were all stripped of their positions during a special election, according to tallies by the San Francisco Department of Elections.

Furious parents launched the recall effort in January 2021 after arguing the school board was pushing progressive politics instead of acting in the best interests of children amid the pandemic.

…The recall effort was launched as the school board was trying to rename 44 school sites that it said honored public figures linked to racism, sexism and other injustices — including Abraham Lincoln, George Washington and trailblazing US Sen. Dianne Feinstein (D-Calif.).

Critics argued the push made a mockery of the country’s racial reckoning — as parents demanded to know why the board would waste time renaming schools when the priority needed to be reopening classrooms. The board eventually scrapped the plan after widespread uproar.

Opponents had called the recall a waste of time and money given the district is facing a number of challenges, including a $125 million budget deficit and the need to replace retiring Superintendent Vincent Matthews.

» Read more

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China tests lunar orbital maneuvers using last in-space component of Chang’e-5 sample return mission

China appears to be using the last in-space component of its Chang’e-5 sample return mission, left in lunar orbit after the samples came back to Earth and the sample ascent capsule was sent crashing to the lunar surface, to test a variety of lunar orbital maneuvers that could be used in future missions.

Chinese engineers have apparently moved it from a near-Moon orbit to what is called a distant retrograde orbit (DRO), shifting back and forth from the Lagrange points on each side of the Moon with respect to the Earth. Though some spacecraft in the Artemis program are planned to use this orbit, this is the first time anyone has done so.

[S]pacecraft activity tracker Jonathan McDowell, also an astrophysicist at the Harvard-Smithsonian Center, told SpaceNews that he believes China is probably using the Chang’e-5 spacecraft gaining experience with astrodynamics. “They are using it as a toy to play around with. It is clearly useful as a stable lunar orbit for future missions, I just don’t think it’s a specific precursor.”

This activity is also par for the course for China. They have previously used other leftover lunar spacecraft to test different orbital maneuvers. The activity also confirms China’s determination to continue its exploration and settlement of the Moon.

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OneWeb sued by businessman for not paying him

An American businessman with ties in Kazakhstan and who claims he used those ties to obtain permission for OneWeb to launch its satellites there has now sued OneWeb.

Giorgi Rtskhiladze, an American-Georgian businessman, claims that he was not paid for arranging space rocket-launch rights for OneWeb in Kazakhstan. The company received public funding in 2020 after filing for bankruptcy and winning the support of Dominic Cummings, then the Prime Minister’s most senior adviser.

The $30m claim, filed in New York, alleges that Mr Rtskhiladze successfully lobbied the Kazakh government to allow OneWeb to launch satellites from Kazakhstan and operate a ground station for its internet network but was not paid. Mr Rtskhiladze alleges that OneWeb defrauded him by keeping him engaged with Kazakh officials but then terminated his services only after he demanded payment. His work led to “hundreds of millions of dollars in value” for OneWeb, he claims.

OneWeb denies these claims entirely. The claims do appear suspicious because Russia was doing the launching, and it has a solid lease to do so with Kazakhstan. Moreover, it is very doubtful Kazakhstan would do anything to threaten those launches, considering Russia was making a lot of money from them and would not take kindly to such an action.

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China wants a formal hot line with U.S. and its companies to avoid space collisions

China last week proposed that a formal method of communications be established between it and the U.S. and its companies in order to avoid space collisions.

The proposal was made after Chinese officials once again claimed that several Starlink satellites had threatened its space station, something U.S. officials dispute.

At a Feb. 10 press conference, Zhao Lijian, spokesman for China’s Ministry of Foreign Affairs, reiterated claims the country made to the United Nations in December that it had to maneuver its space station twice in 2021 to avoid close approaches by SpaceX Starlink satellites. “China was fulfilling the international obligation stipulated by Article V of the Outer Space Treaty by informing the U.N. of the Starlink satellites’ dangerous approach to the Chinese space station that threatened the safety of in-orbit Chinese astronauts,” he said according to a government transcript, adding that the “in-orbit Chinese astronauts were facing real and urgent safety threats.”

China filed its notice with the U.N., he said, after failing to hear U.S. officials. “After the incidents, China’s competent authorities tried multiple times to reach the U.S. side via e-mail, but received no reply,” he said.

The U.S. government, though, tells a different story. In its own note verbale filed with the U.N., dated Jan. 28 and published by the U.N.’s Office for Outer Space Affairs Feb. 3, the U.S. says it never heard from the Chinese government about the close approaches by satellites designated Starlink-1095 and Starlink-2305.

This cat-and-mouse game is not simply about avoiding collisions in space. China this year will launch two more modules to its space station, using its Long March 5B rocket. Unless it has completely redesigned the rocket (very unlikely), the core stage for both launches will come crashing uncontrolled to the ground, causing endless bad press for China. These claims by China appear to be a propaganda effort to improve its image prior to those launches.

Nonetheless, establishing a better lines of communications with China to avoid future collisions makes sense. Right now U.S. companies are forbidden by law from communicating directly with China, which makes resolving collision threats difficult if not impossible.

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A rebranded Virgin Galactic to reopen ticket sales

Capitalism in space: Virgin Galactic today announced both a major rebranding of the company — significantly deemphasizing its links to Richard Branson — as well as a resumption of ticket sales for its suborbital flights.

Virgin Galactic opened ticket sales to the general public and rebranded itself today a week ahead of what promises to be another dismal quarterly earnings report. The company most recently reported to having 700 reservations for suborbital spaceflights, with plans to reach 1,000 later this year. Space tourism flights are currently scheduled for the fourth quarter of 2022.

Virgin Galactic’s battered stock, which opened at $8.93, soared by more than 29 percent to $10.50 on the New York Stock Exchange. The company is scheduled to report earnings (actually a loss) for the fourth quarter of 2021 on Feb. 22.

Tickets will cost $450K, with a $150K deposit required. It also appears that — in order to encourage sales — the company is capping present sales to the first 1,000 who provide the deposit. Since it has for years claimed it has 700 paying customers already, this suggests they are looking for only another 300 at this time.

Branson’s share in the company is now only about 11% — having successfully pumped and then dumped 80% of his shares — and it appears its management senses his name and the association with his Virgin Group now carries more negative than positive connotations. The new company logo for example shrinks the word “Virgin” so much that if you didn’t look close, you’d think the company was simply called “Galactic.”

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First image from IXPE

Supernova remnant Cassiopeia A as seen by IXPE

NASA today released the first image produced from its new X-ray space telescope, the Imaging X-Ray Polarimetry Explorer (IXPE).

The photo to the right is that image, showing the intensity of X-rays coming from the supernovae remnant Cassiopeia A. From the caption:

Colors ranging from cool purple and blue to red and hot white correspond with the increasing brightness of the X-rays. The image was created using X-ray data collected by IXPE between Jan. 11-18.

Though Chandra also detects objects in X-rays, IXPE will also detect their polarization, or the way the rays are oriented as they travel through space.

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Curiosity looks out across the mountains

Curiosity panorama, Sol 3387, February 15, 2022
Click for high resolution. Original images found here and here.

Overview map
Click for interactive map.

Cool image time! The mosaic above, created from two photos taken by Curiosity’s left navigation camera and downloaded from the rover today, looks to the southeast across the small rocky valley the rover has been traversing for the past two months towards Mount Sharp.

The rover had entered this valley through the nearest gap on the left, then traveled uphill from the left to the right until it had passed behind the nearest dark ridge on the right. It then retreated and turned left, starting uphill through Gordon Notch, as shown in the overview map to the right.

On the overview, the white line marks Curiosity’s past travels, with red dotted line indicating its planned future route. The yellow lines indicate the approximate view in the panorama above.

For scale, Navarro Mountain is about 450 feet tall. The actual peak of Mount Sharp is blocked by the white front range to the left. The rover is presently still 12,600 feet below that peak, which sits to the southeast about 35 miles away.

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