Author: Robert Zimmerman

China launches Tianzhou freighter to space station

3:50 pm

The new colonial movement: China today successfully used its Long March 7 rocket to launch a new Tianzhou unmanned cargo freighter to its Tiangong space station.

The cargo is for the station’s next crew, scheduled to launch in June for a six month mission, during which two new large modules will be added to the station.

The launch took place at China’s sea coast Wenchang spaceport, so its expendable lower stages all fell harmlessly in the ocean.

The leaders in the 2022 launch race:

18 SpaceX
15 China
6 Russia
3 Rocket Lab
2 ULA

U.S. private enterprise still leads China 26 to 15 in the national rankings, as well as the entire world combined 26 to 24.

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Pushback: Lawsuit forces Rhode Island to let oral surgeon to reopen his practice

12:27 pm

Oral surgeon Stephen Skoly, blackballed by Rhode Island
Oral surgeon Stephen Skoly, blackballed by Rhode Island

Today’s blacklist story is an update from a story in February, where I outlined how the Rhode Island health department had irrationally shut down the practice of oral surgeon Stephen Skoly — denying 800 patients dental treatment and putting ten employees out of work — simply because Skoly had refused to get the COVID jab for valid medical reasons, including the fact that he had already gotten the Wuhan flu, had anti-bodies, and had other health issues that made getting the shot ill-advised.

Skoly had sued Rhode Island’s governor, Democrat Daniel McKee, as well as the head of the state’s health department, James McDonald. It now appears the lawsuit had some positive impact:

In March 2022, after over five months of suspension, and three days before a court hearing where medical experts were to testify to the irrationality of Rhode Island’s conduct, Rhode Island finally relented. It agreed to treat the N95 masked Dr. Skoly the same as other unvaccinated N95 masked workers. Dr. Skoly was permitted to re-assemble his ten-person dental team and return to practice.

The lawsuit, filed on behalf of Skolly by the New Civil Liberties Alliance, has not been abandoned, and instead has been expanded because of the state’s decision to deny Skoly unemployment benefits.
» Read more

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Curiosity climbing out of Gordon Notch hollow

10:08 am

Panorama showing the upcoming steep climb
Click for full image. For original images go here, here, here, here, and here.

Overview map
Click for interactive map.

Cool image time! The panorama above was created from five photos taken by Curiosity’s right navigation camera on May 4, 2022 as the rover worked its way upward out of Gordon Notch Hollow, the small valley it had left when it attempted to cross the Greenheugh Pediment to the west and was forced to retreat back into when engineers found the rough terrain on the pediment too much for the rover’s wheels.

The overview map to the right provides context. The blue dot marks Curiosity’s present position on Mars, on its 3,465 Sol since landing. The yellow lines mark the area viewed in the panorama, taken two Sols earlier. The red dotted line marks the original planned route, now abandoned. The white arrows indicate one of the more interesting upcoming geological features, dubbed by scientists the “marker horizon,” a distinct layer found in many places on the flanks of Mount Sharp.

On the panorama above the red dotted line is my guess as to the planned route out of Gordon Notch Hollow.
According to the science team’s most recent update on May 4th:
» Read more

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The payload’s view during a Spinlaunch test

8:43 am

Spinlaunch prototype suborbital launcher
Spinlaunch’s prototype launcher

Capitalism in space: Spinlaunch has released a video showing what a Spinlaunch test launch looked like from the payload’s perspective.

I have embedded that video below. This was the company’s eighth test launch, all of which appear to have only gotten to about 30,000 feet or so. The payload camera does not turn on until the payload has been released and is ascending upward. Try to ignore the dramatic music, which of course is nothing but fake PR.

Three things are revealed. One, the acceleration at launch quickly drops as the payload ascends. Second, the payload’s wild spin appears intended, to help stabilize its flight. Third, its descent is slow, suggesting the release of parachutes.
» Read more

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China releases to the public some of the datasets from the Chang’e-5 lunar mission

10:44 am

China announced today that it has made available to the public the data from some of the instruments that flew on its November 2020 Chang’e-5 sample return lunar mission.

The instruments involved were the mission’s landing camera, panoramic camera, lunar mineralogical spectrometer, and regolith penetrating radar.

The data is supposedly available here, but you have to be able to read Chinese to find it.

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Chinese pseudo company Linkspace to try suborbital vertical rocket test this year

10:39 am

The Chinese pseudo-company Linkspace announced in a press release May 5th that it will attempt to vertically launch and land a first stage booster to suborbital space before the end of the year.

The rocket will later be transported to Lenghu in the northwestern Chinese province of Qinghai, the site of LinkSpace’s earlier tests. The team aims to launch the 47.5-foot-tall (14.5 meters) RLV-T6 to an altitude of around 62 miles (100 kilometers) and land it safely using landing legs and grid fins, similar to the way that the first stage of SpaceX’s Falcon 9 rocket touches down.

The rocket to be tested is almost exactly the same height as SpaceX’s Falcon 9 first stage, so apparently this test will be a test of a full scale prototype of Linkspace’s own first stage. If successful, the company will be able to soon followup with reusable launches.

Linkspace had performed small scale vertical rocket tests three years ago, and then disappeared for unknown reasons. Its reappearance now suggests the Chinese government has approved its effort and will thus allow it to go forward.

Note: I call all the so-called private companies coming out of China “pseudo” because none function like an independent company privately owned. They might raise Chinese investment capital and work to earn profit, but anything they design or build is closely determined by the communist Chinese government. None builds anything without that supervision, and should the government change its mind the company will quickly be shut down.

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May 6, 2022 Zimmerman podcast with Countdown to the Moon

8:51 am

Earlier this week I did a 83 minute podcast with Nathan Price as part of his daily Countdown to the Moon project, whereby he is interviewing a person per day, from all walks of life, to get their perspective on America’s attempt to return to the Moon.

Ideally I would interview strangers who do not have an obvious interest in space. And for about three months I was able to do this. I interviewed people at the mall, on the bus, on the train, at the airport, at the coffee shops, on the streets, in the hotel, and where ever else I could find people. Occasionally I would get tied up with work and not find someone to interview, so I took the opportunity to interview family and friends.

He has interviewed now almost a thousand people, and plans to at least that many before ending the project. You can get a sense of what he has learned so far at the link above..

You can watch my podcast with him here.

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Ingenuity in trouble

8:38 am

The engineering team yesterday revealed that several days earlier the Mars helicopter failed to communicate with the rover Perseverance as scheduled, now believed to have been caused by “a low-power state.”

Data downlinked indicates that the communications dropout on May 3, Sol 427 of the Perseverance rover’s mission at Mars, was a result of the solar-powered helicopter entering a low-power state, potentially due to the seasonal increase in the amount of dust in the Martian atmosphere and lower temperatures as winter approaches. The dust diminishes the amount of sunlight hitting the solar array, reducing Ingenuity’s ability to recharge its six lithium-ion batteries. When the battery pack’s state of charge dropped below a lower limit, the helicopter’s field-programmable gate array (FPGA) was powered down.

This state then caused the helicopter’s clock to get out of sync with the clock on Perseverance, so that when the rover tried to communicate the helicopter was not listening.

Engineers regained communications on May 5th, but the helicopter remains in trouble. Its batteries are no longer fully charged, which means it doesn’t have enough power to heat Ingenuity through the longer cold nights of winter that presently exist in Jezero crater.

The engineers have established a plan to get the batteries back up to full charge, but it means the heaters will no longer attempt to warm the helicopter as much. The result could be damaged parts not able to withstand those colder temperatures.

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Why a big Earth mountain would hardly be noticed on Mars

5:46 pm

A big mountain lost on Mars
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken on February 13, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a cliff escarpment that, based on a rough estimate of MRO’s elevation data, ranges from 10,000 to 13,000 feet high. Because the sun is only about 32 degrees above the western horizon, the shadows are long and distinct and bring out the features quite dramatically.

On Earth, a mountain 13,000 feet high would generally be named, because there are really not that many of them. If it was a cliff face dropping down into a canyon, which this Martian cliff is, it would be quite unique and probably be one of the most popular tourist spots on the globe. For comparison, the rim of the Grand Canyon in the national park, visited by millions, is only 4,000 to 6000 feet in elevation. This cliff on Mars is more than twice as deep, and yet, it is hardly the most spectacular canyon rim on the red planet.

The overview map below explains this.
» Read more

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The Ukraine War: Reassessing the situation after another month

1:33 pm

The Ukraine War as of April 9, 2022
The Ukraine War as of April 9, 2022. Click for full map.

The Ukraine War as of May 5, 2022
The Ukraine War as of May 5, 2022. Click for full map.

Since my last look at the state of Russia’s invasion of the Ukraine on April 7, 2022, not much as happened, as indicated by the two maps to the right, both simplified versions of maps created by the Institute for the Study of War (ISW).

The red hatched areas are regions Russia captured in 2014. The red areas are regions the Russians have captured in this invasion and now fully control. The pink areas are regions they have occupied but do not fully control. The tan areas the Russians claim to control but the control remains unconfirmed. Blue regions are areas the Ukraine has recaptured. The blue hatched area is where local Ukrainians have had some success resisting Russian occupation.

Russia has now completely shifted its military resources from the north to the eastern parts of the Ukraine. As a result it has had some success firming up its control over the regions it had invaded to the north and east of the Donetsk and Luhansk regions it had grabbed in 2014. Yet, these gains were only in areas Russia had already occupied. In the past month it has almost entirely failed to invade or capture any additional territory.

Meanwhile, the Ukraine has begun to have some success in retaking territory around the city of Kharkiv. It also successfully pushed back an advance Russia attempted to the west of Donetsk. Moreover, despite repeated expectations that the full occupation of the city of Maripol would be completed a month ago, that occupation is still not complete, with resistant forces still fighting heavily in one area and thus tying up Russia forces for far longer than expected.

The May 5th assessment by ISW said this:

Russian forces continued ineffectual offensive operations in southern Kharkiv, Donetsk, and Luhansk Oblasts without securing any significant territorial gains in the past 24 hours. The Pentagon assessed that Russian forces have not been able to make further advances due to their inability to conduct offensive operations far from their ground lines of communication (GLOCs) along highways, as ISW previously assessed, and muddy terrain. … Russian forces are reportedly suffering losses in stalled attacks along the Izyum axis, with the Ukrainian General Staff reporting that elements of the 4th Tank Division and the 106th Airborne Division withdrew to Russia after sustaining heavy losses in the past several days.

Russian forces conducted unsuccessful attacks in Lyman, Severodonetsk, and Popasna, and maintained shelling along the line of contact in Donetsk and Luhansk Oblasts. Russian forces also used thermobaric munitions against Ukrainian positions in Lyman and are unsuccessfully attempting to leverage massed artillery fire to break through Ukrainian defenses.

The overall trend seems to favor the Russians. Whether it can gain more territory is unclear, but it seems that except for one area near Kharkiv it is firming up its control on the territories grabbed in early March. The question now remains: Can Russia expand its invasion, or can the Ukraine push back and force the Russians back?

Right now it looks like neither can do either, and the situation shall remain bogged down for the near future.

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