Author: Robert Zimmerman

Ryugu’s most primitive boulders

1:18 pm

In a just published paper scientists reveal how they think they have identified the oldest rocks on the rubble pile asteroid Ryugu, and found them to be distributed across the entire face of the asteroid.

These boulders are light enough that they would float on water.

Ryugu is thought to have initially formed as a fluffy planetesimal that coalesced from accumulated dust in the early Solar System, and subsequently underwent processes such as thermal evolution and compression. This parent body was then later destroyed in a collision and fragments of this reaccumulated into the asteroid. However, planetesimals have never been seen, so whether they really existed or what they may have looked like is one of the biggest challenges in understanding the planet formation process. The boulders discovered in this research are thought to be a material that most strongly retains the appearance of the fluffy planetesimals that triggered the birth of the planets in the Solar System.

Additionally, the data from all the scientific instruments onboard Hayabusa2 that were used to examine the surface of Ryugu revealed that fragments of material similar to those of the ultra-high porosity boulders are globally distributed over the asteroid surface, and may have been collected in the sample taken by Hayabusa2. If highly primitive material with the ultra-high porosity discovered here is also found in the collected samples, it will both clarify the formation and evolutional history of Ryugu’s parent body, and also provide evidence of planetesimal formation in the early stage of the Solar System formation process.

There is no word yet from the scientists studying the Hayabusa-2 samples on what they have found. This paper gives them an idea of what could be the most important type of rock to look for.

0 comments

Today’s blacklisted American: All conservatives on Facebook

12:59 pm

The Bill of Rights cancelled at Facebook and Instagram
No first amendment on Facebook.

The new dark age of silencing: It isn’t really news to post an article describing the effort at Facebook to silence and squelch conservative thought. I along with many others have already done so repeatedly, with the worst and most blatant banning beginning with the wave of censorship that these big social media sites initiated just after January 6th. Nor has Facebook eased up in subsequent months. For example, in April Facebook blackballed a mother for daring to criticize the radical Marxist and racist policies of her school board.

Since then, Facebook has shut down a pro-Israel Christian site with 77 million followers and blocked the viewing of reviews of a climate book by former Obama science advisor Steve Koonin that raised doubts about the theory of human-caused climate change.

In the former case, it appears that Facebook allowed itself to be influenced by a orchestrated attack by radical Islamic organizations, which posted more than a million comments of complaint to the site in an effort to get it canceled. Facebook of course complied.

In the latter case Facebook took on faith the complaints made by pro-global warming websites, which claimed that the book was false simply because it disagreed with those pro-global warming sites. None of them actually cited any incorrect facts put forth by the reviewed book. And even if they had found errors and falsehoods, the right answer to bad speech is never censorship, but an educated response.

Facebook claims that this censorship campaign is not really aimed at any particular political point of view, but is instead designed to reduce the overall political content on Facebook. And yet, their own description of their effort illustrates its partisan nature:
» Read more

12 comments

The big cliffs of Gediz Vallis on Mars

11:33 am

The Big Cliffs of Mt Sharp
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken on May 21, 2021 by Curiosity’s chemistry camera (ChemCam), normally designed to look at high resolution close-up imagery of nearby objects.

However, it can also be used as what the science team call “a long distance spyglass.” The image to the right is an example, looking at what I think are the distant but steadily approaching big cliffs on the western wall of the canyon Gediz Vallis. Make sure you look close at the shadowed cliff-face, probably several hundred feet high. It is filled with huge rock faces reminiscent of the most stark rock cliffs on the mountains of Earth.

The two images below provide the context, which makes the image even more quite breath-taking.
» Read more

3 comments

The arrival of routine flights of commercial space passengers to orbit now makes the meaning of the word “astronaut” very unclear

9:45 am

Link here. Up to now the word “astronaut” has generally been applied to anyone who has flown in space, though its use for the previous space tourists has generally seemed inappropriate.

The arrival this fall of regularly and frequent commercial flights carrying private passengers into space raises the question: What do we call these individuals? Some, such as the companies Axiom and Blue Origin, want to call them astronauts. Others, such as previous space tourists Richard Garriott and former senator and now NASA administrator Bill Nelson, think that word should be reserved for the professionals. Think for example of aviation. You don’t get wings by simply flying on a commercial jet. You have to fly a plane yourself, and do it solo to earn that designation.

In truth, the most likely thing that will happen in the future is that no future space traveler will be called an astronaut. As the article notes correctly,

It might be necessary to retire the term altogether once hundreds if not thousands reach space, noted Fordham University history professor Asif Siddiqi, the author of several space books. “Are we going to call each and every one of them astronauts?”

The term is going to become historical, referring not to those who have reached space, but to those early pioneers to made it possible for everyone else. It carries too much special meaning to assign it to every Tom, Dick, or Harry who simply bought a ticket. It signifies a person who did something special and at great risk, and deserves a special honor because of it.

Neil Armstrong and Yuri Gagarin were astronauts. It seems wrong to call every commercial passenger who follows the same.

22 comments

Bernie Sanders throws a wrench into Senate bill forcing NASA to award two lunar lander contracts

9:18 am

Capitalism in space? Senator Bernie Sanders (Socialist/Democrat-Vermont) has submitted a new amendment to the new NASA authorization bill, now being debated in the Senate, that eliminates the earlier changes added by senator Maria Cantwell (D-Washington) that required NASA to award a contract to a second company for building its manned lunar lander.

This earlier amendment, submitted by Sen. Maria Cantwell (D-Wash.), modified NASA’s Artemis Program. Cantwell’s amendment, in part, called for $10.03 billion in additional funding for NASA to carry out the Human Landing System program. This legislation was filed as Blue Origin and Jeff Bezos were urging Congress to add $10 billion to NASA’s budget—enough money to fully fund the development of a second Human Landing System. It was passed 11 days ago without any debate by the US Senate Committee on Commerce, Science, and Transportation.

Sanders’ terse amendment seeks to excise the Cantwell language that provides additional funding for a Human Landing System.

While Sanders’ amendment probably makes more sense based on the money that Congress has actually appropriated for this task, he didn’t do it for that reason. More likely he did it as a petty attack on Jeff Bezos, whose company Blue Origin was likely expected to win that second contract.

Nothing is settled yet of course. The bill still has to pass the Senate and also be approved by the House, then signed by the president. Much will change before then.

Regardless, isn’t nice how NASA’s modern space effort is so well designed by our senators and congressmen? What would we do without them?

14 comments

A detailed review of Virgin Galactic

9:03 am

Link here. The article not only provides a thorough review of the company’s most recent test flight and what it did and did not accomplish, it takes a look backward to reevaluate Virgin Galactic’s history, including the many engineering problems in the past few years that have slowed development and risked lives.

The most shocking aspect of this story is this fact:

The fact that VSS Unity was broken was never disclosed to Social Capital shareholders who approved the merger, or to investors who bought the stock after the merged companies went public under Virgin Galactic’s name on the New York Stock Exchange on Oct. 28, 2019.

The source who revealed the near-fatal February 2019 flight to Parabolic Arc questioned whether withholding that information from shareholders was legal under securities laws. A number of law firms have launched investigations into Virgin Galactic recently. Their primary focus seems to be the steep drop in the company’s stock price earlier this year. (It has rebounded sharply since the flight test.) But, perhaps they will carefully review the company’s public disclosures regarding the condition of VSS Unity.

In reviewing the building competition between Virgin Galactic and Blue Origin to fly the first commercial passengers, the article also confirms many of the same observations I have made about both companies.

Read it all. It shines light beyond the pr blather that you will get from most modern media as they rewrite press releases.

1 comment

Folded ballots caused many (but not all) of the tabulator errors in New Hampshire vote

3:31 pm

The auditors of the Windham, New Hampshire, local vote have determined that folded ballots caused many of the false totals produced by the computer tabulators.

Auditors said they found “experimental confirmation that if the contest is undervoted, a fold through a vote target can create a vote.”

“Something we strongly suspect at this juncture, based on various evidence, is that in some cases, fold lines are being interpreted by the scanners as valid votes,” Mark Lindeman, who is part of the audit team, told WMUR.

Harri Hursti, another auditor, wrote on Twitter that testing proved folded ballots were misinterpreted by machines. “Test decks proved that foldings across a vote targets is misinterpreted as additional phantom votes or subtracts votes due to false overvotes,” he wrote in a post.

Their testing however has shown that folded ballots are not the only cause of the untrustworthy tabulations.

Another machine was found to have “an even more dramatic problem” by the auditors, who said that only 28 percent of the votes for Republican candidates were counted.

The machines were apparently provided by a company called AccuVote, but the “machines’ intellectual property is owned by Dominion Voting Systems.”

The results here prove that these tabulator machines are totally untrustworthy, and should be junked entirely, with the state having a legitimate case for suing the companies involved for failure to deliver.

At the least. The research so far has found that the bulk of the errors routinely seem to penalize Republicans. If further research reveals that this partisan slant is not an accident, then criminal charges might very well be in order.

0 comments

GAO finds more NASA cost overruns in Webb, SLS, and Orion

2:18 pm

GAO graph documenting NASA's big project delays and cost overruns

The annual Government Accountability Office’s (GAO) report on major NASA-led programs has found that the cost overruns and scheduling problems it has documented now for years continued in 2020.

You can obtain the report here. The graph to the left, from the report, summarizes the data quite succinctly.

The cumulative cost overrun of 20 major programs in development, defined as those with total costs of at least $250 million, grew to more than $9.6 billion in the report. Three programs — the James Webb Space Telescope, Orion spacecraft and Space Launch System — account for $8 billion of that total, including $4.4 billion for JWST alone.

SLS and the Exploration Ground Systems program accounted for effectively all of the $1.1 billion in overruns in 2020. … SLS alone accounted for nearly $990 million in cost increases. About two-thirds of that increase came from NASA adopting a GAO recommendation to lower the original baseline cost estimate for SLS to properly account for work that had been shifted to later phases of the program.

The report also documented almost 20 years of cumulative delays, with Webb leading the way with delays of more than seven years. The new report added 37 more months of delays during the last year.

The report, and NASA, laid the blame for many of the more recent delays and cost overruns on last year’s COVID epidemic, but if so those delays were imposed by choice, not necessity, considering how both China and SpaceX moved forward without any delays during the same time period. In reporting on NASA for the last three decades I have found it willing to initiate long delays at the drop of a hat, sometimes for reasons, such as a storm that causes some minor damage, that do not justify either the delay or its length. The COVID panic was just another example of this.

4 comments

Today’s blacklisted American: Tenured professor objects to segregated-by-race training classes at university; school investigates and punishes her

11:55 am

Today's modern witch hunt
Burning witches: What the Lake Washington Institute of
Technology wants to do to anyone who expresses an
original and independent thought

They’re coming for you next: Because a tenured professor, Elisa Parrett, made a four minute statement objecting to the segregated-by-race training class the Lake Washington Institute of Technology was mandating for its teachers, the school instigated a nine month investigation resulting in a reprimand and rules forbidding her to speak on such topics again.

The investigation included the hiring of a private investigator, numerous interviews, public humiliation, and wild unsubstantiated claims that her remarks caused widespread trauma. The school removed her from her teaching duties, and worse, doubled down on its insistence that future sessions will be segregated by race. From the university’s president Amy Morrison:
» Read more

23 comments

Sierra Space signs up its first customer for its commercial space station

9:11 am

Capitalism in space: Sierra Space, the newly created space division of Sierra Nevada, announced last week that it has signed an agreement with Redwire, formerly known as Made in Space, to establish manufacturing facilities on its LIFE private space station.

The press release is vague about details, being mostly a sales pitch for encouraging other in-space manufacturing companies to consider partnering with Sierra. This in turn suggests the agreement is nothing more that a statement by Redwire that should Sierra’s station launch, it will then be willing to launch its 3D printing technology to it.

Nonetheless, this agreement lends weight to Sierra’s station proposal, which while plausible still remains somewhat vague as there is no indication on when the company plans to launch it.

2 comments

Zhurong rolls onto Martian surface

10:39 am

Zhurong's view of lander after deployment onto Martian surface

The new colonial movement: According to China’s state-run press, the Zhurong rover has successfully rolled off its lander and reached the Martian surface.

The image to the right was taken by the rover’s rear hazard avoidance camera, and shows the lander and the deployment ramps behind Zhurong.

At this moment China has released no other images of the Martian surface, nor have they revealed if they have a precise idea of where the lander actually put down on Mars. This latter information is essential for them to plan the rover’s travels over its 90-day nominal mission.

Nonetheless, it appears Zhurong is functioning perfectly. If all goes right, it will not only complete that 90-day mission but continue on for considerably longer, as have other similar small rovers on both Mars and the Moon.

39 comments
1 … 932 933 934 935 936 … 2,927