Category: Points of Information

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

Lucy solar panel almost completely open

11:19 am

Engineers have now been able to get the one solar panel that did not deploy completely after launch on the Lucy asteroid probe almost completely open.

From May 6 to June 16, NASA’s Lucy mission team carried out a multi-stage effort intended to further deploy the spacecraft’s unlatched solar array. The team commanded the spacecraft to operate the array’s deployment motor for limited periods of time, allowing them to closely monitor the response of the spacecraft. As a result of this effort, the mission succeeded in further deploying the array and now estimates that the solar array is between 353 degrees and 357 degrees open (out of 360 total degrees for a fully deployed array). Additionally, the array is under substantially more tension, giving it significantly more stabilization. The mission team is increasingly confident the solar array will successfully meet the mission’s needs in its current tensioned and stabilized state.

The spacecraft’s orbit is now moving into a position where communications will be limited until October, so further attempts to completely open the array will have to wait until then.

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Virgin Orbit puts seven Space Force smallsats in orbit

10:05 am

Capitalism in space: Virgin Orbit last night successfully launched seven smallsats for the Space Force, using its Cosmic Girl 747 carrier plane and its LauncherOne rocket.

This was the company’s first night time launch, and its second in 2022. The leader board for the 2022 launch race remains the same:

27 SpaceX
21 China
8 Russia
4 Rocket Lab
4 ULA

The U.S. now leads China 39 to 21 in the national rankings, and the entire world combined 39 to 35.

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Strange pitted and isolated ridges on Mars

2:30 pm

Context camera image of isolated ridges
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on February 17, 2012 by the wide-view context camera on Mars Reconnaissance Orbiter (MRO). It shows a section of the northern lowland plains of Mars, latitude 31 degrees north, where several very inexplicable and isolated ridges can be seen.

One ridge meanders mostly in a north-south direction, while a second instead meanders east-west. The shape of both says that neither has anything to do with any past impact crater. In fact, their random snakelike shape doesn’t really fit any obvious explanation. For example, they do not fit the look of the many fossil rivers found on Mars, where the hardened and dry riverbed channel resists erosion and becomes a ridge when the surrounding terrain erodes away.

What geological process caused them? In the decade since this photo was taken the scientists who use MRO have only been able to snap a handful of high resolution images of these ridges. The image below is the most recent, covering the area in the white rectangle above.
» Read more

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Today’s blacklisted American: University of Arizona gives free tuition to American Indians; All other races must pay

12:01 pm

Academia: dedicated to segregation!
University of Arizona: dedicated to the new segregation!

“Segregation today, segregation tomorrow, segregation forever!” The University of Arizona has begun a new racist policy whereby anyone who is a member of one of 22 American Indian tribes that exist in the state will be excused from paying any tuition or fees while studying on campus.

Beginning in the fall, new and continuing full-time, degree-seeking, in-state undergraduates will be eligible for the Arizona Native Scholars Grant, the first program of its kind in Arizona. The program will be administered by UArizona Enrollment Management.

“Serving Arizona’s Native American tribes and tribal students is a crucial part of the University of Arizona’s land-grant mission, and the Arizona Native Scholars Grant program is another important step among many to do that,” said University of Arizona President Robert C. Robbins. “I am so proud that that this university has found a way to help hundreds of students more easily access and complete a college education, and I look forward to finding ways to take these efforts even further.”

To be eligible, students must complete the Free Application for Federal Student Aid, or FAFSA, and provide tribal identification. Native American tribes’ federal legal status allows universities to administer scholarships and grants to tribal members.

More than 400 students enrolled at UArizona last year meet the criteria for the new program.

Let me translate what UA president Robert C. Robbins is really saying:
» Read more

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Kepler signs up D-Orbit’s orbital tug for its next two satellites

9:56 am

Capitalism in space: The Canadian company Kepler — which already has nineteen satellites in orbit providing data communications — will use the orbital tug developed by the start-up D-Orbit and dubbed ION on its next two satellites.

After separating from the launch vehicle, D-Orbit intends to use ION to drop Kepler’s satellites off at a sun-synchronous orbit (SSO) between 500 and 600 kilometers. Each satellite is the size of six cubesats, a standard smallsat form factor measuring 10 centimeters on each side.

Kepler previously had a deal to use Momentus’s Vigoride tug, but delays and further in-orbit technical problems with that tug has apparently forced it to switch to D-Orbit.

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New research confirms long term bone loss during long missions in weightlessness

9:46 am

According to new research done on ISS, scientists have confirmed what Soviet-era scientists had learned back in the 20th century, that long term bone loss during long missions in weightlessness can take many months to recover once back on Earth.

The bone density lost by astronauts was equivalent to how much they would shed in several decades if they were back on Earth, said study co-author Dr Steven Boyd, of Canada’s University of Calgary and director of the McCaig Institute for Bone and Joint Health.

The researchers found that the shinbone density of nine of the astronauts had not fully recovered after a year on Earth – and they were still lacking about a decade’s worth of bone mass. The astronauts who went on the longest missions, which ranged from four to seven months on the ISS, were the slowest to recover. “The longer you spend in space, the more bone you lose,” Boyd said.

The study also confirmed that some exercises in space helped to mitigate the bone loss, which ranged from 1% to 2% per month. No exercises prevented it however.

For missions to Mars, the bone loss appears less of an issue than the loss of muscle strength. Even with extensive bone loss after six months to a year in space astronauts do not notice this loss when returning to Earth gravity. They will certainly not notice it on Mars, with a gravity field 39% that of Earth’s.

More concerning is the loss of muscle strength during long missions in weightlessness. After six months to a year in weightlessness astronauts struggle on Earth to walk after first landing. This is why they are helped immediately placed to chairs upon return. On Mars no such help will be available.

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OneWeb signs up startup rocket company Relativity for future satellite launches

9:34 am

Capitalism in space: The rocket startup Relativity, which hopes to complete its first test launch of its small Terran-1 rocket before the end of the year, yesterday announced that it has won a launch contract with OneWeb to use its larger but not-yet-ready-for-launch Terran-R rocket to place future OneWeb satellites into orbit.

Under the agreement, Relativity will launch OneWeb’s low Earth orbit (LEO) satellites on Terran-R, the first fully reusable and entirely 3D printed rocket, starting in 2025. These launches will support OneWeb’s deployment of its Gen 2 satellite network, which will add capacity and fresh capabilities to build upon the initial constellation of 648 satellites the company is currently building out.

Since its launch contract with Arianespace using Russian Soyuz rockets fell apart due to Russia’s invasion of the Ukraine, OneWeb has been signing up a range of rocket companies, first SpaceX, then India, now Relativity. Apparently the satellite company realized it was a bad idea to depend on only one rocket, and is now lining up several to make sure its satellites can launch on schedule, no matter what.

For Relativity, this agreement solidifies its future, even before it has completed its first launch. It now has five customers for its Terran-R rocket, with contracts worth $1.2 billion. All it has to do now to become a major player in the global launch market is to get its rockets off the ground.

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ISRO chief: India’s manned mission will be delayed

9:22 am

The new colonial movement: The head of India’s space agency ISRO revealed during a press conference following yesterday’s PSLV launch that he is delaying by one or two years Gaganyaan manned mission.

Indian Space Research Organisation (Isro) Chairman S Somanath on Thursday said the launch of the ambitious Gaganyaan mission, the country’s first manned space flight, cannot happen this year or next year as the agency is keen to ensure that all safety systems are in place.

Somanth’s comments confirm an earlier report. It appears he wants the agency to do at least two unmanned tests of the spacecraft’s crew abort system. He also want further tests of the GSLV rocket that will launch the manned capsule.

Somanth also indicated that India’s next attempt to land a rover on the Moon, Chandrayaan-3, might also be delayed from the presently scheduled August ’22 target launch as they review the lander’s systems.

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FCC approves Starlink for moving vehicles; rejects DISH’s request to use Starlink wavelength

9:06 am

The FCC made two decisions yesterday that were both favorable to SpaceX’s Starlink satellite constellation.

First, it gave Starlink permission to provide service on moving vehicles such as cars, trucks, boats, and aircraft. Second, it rejected a DISH network request to use a wavelength in its ground-based system that is presently being used by both Starlink and OneWeb satellites.

This decision will continue the shift in communications from high-orbit/ground-based to low-orbit satellite constellations.

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Glacial features in a Mars crater at 29 degrees south latitude?

3:56 pm

Glacial features in Mars crater
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken on January 2, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Simply labeled “slope features,” it was likely taken to monitor the gullies and streaks on the interior walls of this 4-mile-wide crater. Scientists have been using MRO to track the coming and going of frost on this crater’s interior walls since 2016.

Equally intriguing however are what appear to be squashed layers within the crater’s interior. These appear to be some form of glacial feature created by repeated climate cycles, similar to the glacial features routinely seen throughout the 30 to 60 degree mid-latitude strips north and south.

What makes the glacial features in this particular crater particularly intriguing is its location, as shown in the overview map below.
» Read more

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