COVID-19: the unwarranted panic

2:41 pm

Four more stories today indicate once again that the worldwide panic over the corona/COVID-19/Wuhan virus is strongly unwarranted:

The first report, from the science journal Science, provides an update on the situation in South Korea, where testing for the virus has been the most thorough of any nation in the world and where, because of that extensive testing, has shown the death rate has turned out to be far lower than the preliminary statistics have suggested. Out of a population of 50 million, slightly more than 8,000 have been infected, with only 81 dying. This is a death rate of 0.9%, higher than the flu’s 0.1% but not horribly so. And like the flu, most of those deaths have been among the elderly.

The numbers there are now dropping, indicating that the disease might have run its course without causing a catastrophic disaster. There is still a chance it could break out again, but the data suggests otherwise.

Moreover, South Korea controlled the situation without any strong-arm authoritarian tactics, as seen in China and as becoming popular here in the formerly free U.S.

“South Korea is a democratic republic, we feel a lockdown is not a reasonable choice,” says Kim Woo-Joo, an infectious disease specialist at Korea University.

It sadly appears that South Koreans might value freedom more than too many of today’s Americans.

The second article describes research from Wuhan in Hubei province in China, reconfirming the South Korean data. There it appears the death rate was 1.4%, only slightly higher than in South Korea. And once again, the death rate is mostly confined to the older population with already existing health issues, like the flu:
» Read more

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Tuesday at the non-existent Lunar & Planetary Science Conference

1:43 pm

Boulder on Bennu with changes in layered texture changes

Today was supposed to have been the second day of the week-long 51st annual Lunar & Planetary Conference, sadly cancelled due to fear of the Wuhan virus. As I had planned to attend, I am now spending each day this week reviewing the abstracts of the planned presentations, and giving my readers a review of what scientists had hoped to present. Because I am not in the room with these scientists, however, I cannot quickly get answers to any questions I might have, so for these daily reports my reporting must be more superficial than I would like.

On this day the most significant reports came from scientists working on the probes to the asteroids Bennu and Ryugu as well as the probes to the Moon. The image to right for example is from one abstract [pdf] that studied the texture differences found fourteen boulders on Bennu. The arrows point to the contacts between the different textures, suggesting the existence of layers. Such layers could not have been created on Bennu. Instead, these rocks must have formed on a parent body large enough and existing long enough for such geological processes to take place. At some point that parent body was hit, flinging debris into space that eventually reassembled into the rubble pile of boulders that is Bennu.

Other abstracts from scientists from both the Hayabusa-2 mission to Ryugu and the OSIRIS-REx mission to Bennu covered a whole range of topics:
» Read more

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Genesis cover

On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.

 

The print edition can be purchased at Amazon or any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.


The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
 

"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News

Sea Launch arrives in Russia

9:28 am

The floating launch platform, built privately by an international partnership in the late 1990s and now owned by a Russian airline company, has arrived in Russia after a one month sea voyage from California.

Though supposedly owned now by S7, Sea Launch is really controlled by the Russian government and Roscosmos. They hope to use it as launch platform for their new Soyuz-5 rocket, intended as a family of rockets that would replace their venerable the Soyuz rocket originally developed in the 1960s.

Having a floating launch platform will also give Russia the ability for the first time to place satellites in low inclination orbits. The high latitudes of most of Russia means that any launches from any of their spaceports, including the one in Kazakhstan, will have a high inclination as well.

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Conscious Choice cover

Now available in hardback and paperback as well as ebook!

 

From the press release: In this ground-breaking new history of early America, historian Robert Zimmerman not only exposes the lie behind The New York Times 1619 Project that falsely claims slavery is central to the history of the United States, he also provides profound lessons about the nature of human societies, lessons important for Americans today as well as for all future settlers on Mars and elsewhere in space.

 
Conscious Choice: The origins of slavery in America and why it matters today and for our future in outer space, is a riveting page-turning story that documents how slavery slowly became pervasive in the southern British colonies of North America, colonies founded by a people and culture that not only did not allow slavery but in every way were hostile to the practice.  
Conscious Choice does more however. In telling the tragic history of the Virginia colony and the rise of slavery there, Zimmerman lays out the proper path for creating healthy societies in places like the Moon and Mars.

 

“Zimmerman’s ground-breaking history provides every future generation the basic framework for establishing new societies on other worlds. We would be wise to heed what he says.” —Robert Zubrin, founder of the Mars Society.

 

All editions are available at Amazon, Barnes & Noble, and all book vendors, with the ebook priced at $5.99 before discount. All editions can also be purchased direct from the ebook publisher, ebookit, in which case you don't support the big tech companies and the author gets a bigger cut much sooner.

 

Autographed printed copies are also available at discount directly from the author (hardback $29.95; paperback $14.95; Shipping cost for either: $6.00). Just send an email to zimmerman @ nasw dot org.

Arianespace suspends all launches from French Guiana due to COVID-19

1:47 pm

The insanity mounts! Arianespace today announced it is suspending all launches from its French Guiana launchsite due to COVID-19.

No word on how long this suspension will last. So far, French Guiana has six confirmed cases of the Wuhan virus. In recent years that nation has routinely seen between one to two thousand flu cases. I wonder why they didn’t shut down then?

Or if they can ever reopen, considering the severity of flu cases annually?

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Leaving Earth cover

Leaving Earth: Space Stations, Rival Superpowers, and the Quest for Interplanetary Travel, can be purchased as an ebook everywhere for only $3.99 (before discount) at amazon, Barnes & Noble, all ebook vendors, or direct from my ebook publisher, ebookit.

 

If you buy it from ebookit you don't support the big oppressive tech companies and I get a bigger cut much sooner.

 

Winner of the 2003 Eugene M. Emme Award of the American Astronautical Society.

 
"Leaving Earth is one of the best and certainly the most comprehensive summary of our drive into space that I have ever read. It will be invaluable to future scholars because it will tell them how the next chapter of human history opened." -- Arthur C. Clarke

Launch failure for China’s new Long March 7A rocket

1:20 pm

The first launch attempt of China’s newly upgraded Long March 7 rocket, dubbed the 7A, ended in failure today.

As is usual for China, very little concrete information was released, about the payload or the failure.

State news agency confirmed failure (in Chinese) just under two hours after launch, with no cause nor nature of the failure stated.

The Long March 7A is an effort by China to replace the use of rockets that use dangerous propellants and are launched in the interior of the country, sometimes dumping their first stages in habitable regions.

The Long March 7A is a variant of the standard Long March 7, which has flown twice. A 2017 mission to test the Tianzhou refueling spacecraft with Tiangong-2 space lab was its most recent activity. The launcher uses RP-1 and liquid oxygen propellant and could replace older models using toxic propellants.

It is also intended to launch from their new coastal spaceport in Wenchang. It did this today, though unsuccessfully.

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Monday at the non-existent Lunar & Planetary Science Conference

1:08 pm

Today I had planned on attending the first day of the 51st annual Lunar & Planetary Science Conference in the suburbs of Houston, Texas. Sadly, for the generally foolish and panicky reasons that is gripping America these days, the people in charge, all scientists, decided to cancel out of fear of a virus that so far appears generally only slightly more dangerous than the flu, though affecting far far far fewer people.

Anyway, below are some of the interesting tidbits that I have gleaned from the abstracts posted for each of Monday’s planned presentations. Unfortunately, because I am not in the room with these scientists, I cannot get my questions answered quickly, or at all. My readers must therefore be satisfied with a somewhat superficial description.
» Read more

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Falcon 9 aborts automatically at T minus 0

10:23 am

A SpaceX launch attempt today to put sixty more Starlink satellites into orbit aborted at T minus Zero when the rocket’s computer software shut things down just after the engines began firing.

I have embedded the video below the fold. According to the broadcast, they had “a condition regarding engine power,” suggesting that one or more of the Merlin engines did not power up as expected and the computers reacted to shut the launch down because of this.

Not surprisingly, they have not yet announced a new launch date.
» Read more

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Gateway dropped from NASA lunar landing plans

9:30 am

According to the head of NASA’s manned program, the agency has revised its 2024 lunar landing plans so that the Lunar Gateway space station is no longer needed.

In a conversation with the NASA Advisory Council’s science committee March 13, Doug Loverro, NASA associate administrator for human exploration and operations, said he had been working to “de-risk” the Artemis program to focus primarily on the mandatory activities needed to achieve the 2024 landing goal.

…Later in the half-hour session, he said that means taking the lunar Gateway off the critical path for the 2024 landing. That was in part because of what he deemed a “high possibility” of it falling behind schedule since it will use high-power solar electric propulsion in its first module, the Power and Propulsion Element. “From a physics perspective, I can guarantee you we do not need it for this launch,” he said of the Gateway.

Loverro added that he wasn’t cutting Gateway, only pushing it back in order to prioritize their effort in getting to the lunar surface more quickly.

The Trump administration has been slowly easing NASA away from Gateway, probably doing so slowly in order to avoid upsetting some people in Congress (Hi there Senator Shelby!). They have probably looked at the budget numbers, the schedule, and the technical obstacles that are all created by Gateway, and have realized that they either can go to the Moon, or build a dead-end space station in lunar orbit. They have chosen the former.

Someday a Gateway station will be needed and built. This is not the time. I pray the Trump administration can force this decision through Congress.

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China on track for Mars launch in July?

2:44 pm

Two stories today, one from Nature and the second from space.com, pushed the idea that China’s Mars orbiter/lander/rover mission is still on schedule to meet the July launch window.

A close read of both stories however revealed very little information to support that idea.

The Nature article provided some details about how the project is working around travel restrictions put in place because of the COVID-19 virus epidemic. For example, it told a story about how employees drove six scientific instruments by car to the assembly point rather than fly or take a train, thereby avoiding crowds.

What struck me however was that this supposedly occurred “several days ago,” and involved six science payloads that had not yet been installed on the spacecraft. To be installing such instrumentation at this date, only four months from launch, does not inspire confidence. It leaves them almost no time for thermal and vibration testing of the spacecraft.

The article also provided little information about the status of the entire project.

The space.com article was similar. Lots of information about how China’s space program is dealing with the epidemic, but little concrete information about the mission itself, noting “the lack of official comment on the mission.” Even more puzzling was the statement in this article that the rover “underwent its space environment testing in late January.”

I wonder how that is possible if those six instruments above had not yet been installed. Maybe the instruments were for the lander or orbiter, but if so that means the entire package is not yet assembled and has not been thoroughly tested as a unit. Very worrisome.

Posting today has been light because I was up most of the night dealing with a family health issue, meaning that I ended up sleeping for several hours during the day. All is well, nothing serious (it is NOT coronavirus), but it has left my brain and schedule very confused. Will likely take a good night’s sleep to get back to normal.

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Black dunes and weird hills on Mars

1:41 pm

Black dunes and weird hills on Mars
Click for full image.

Cool image time! Or I should say a bunch of cool images! The photo on the right, rotated, cropped, reduced, and annotated by me, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on February 3, 2020. An uncaptioned image, it was entitled “Arabia Terra with Stair-Stepped Hills and Dark Dunes.” Arabia Terra is one of the largest regions of the transition zone on Mars between the northern lowland plains and the southern cratered highlands. It is also where Opportunity landed, and where Europe’s Rosalind Franklin rover will land, in 2022.

This image has so many weird and strange features, I decided to show them all, Below are the three areas indicated by the white boxes, at full resolution. One shows the black dunes, almost certainly made up of sand ground from volcanic ash spewed from a long ago volcanic eruption on Mars.
» Read more

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Sunspot update: The flatline resumes

12:17 pm

NOAA this week released its February update of its monthly graph showing the long term sunspot activity of the Sun. Below is my monthly version, annotated as I have done every month since 2011.

After a tiny uptick in sunspot activity in January, the Sun resumed the unprecedented flatlining of sunspot activity that began last June. Since then, the Sun has produced practically no sunspots, a drought that as far as I can tell has never happened since the 11-year sunspot cycle resumed in the 1700s (after the grand minimum in the 1600s) and astronomers began counting sunspots.

February 2020 sunspot activity
The graph above has been modified to show the predictions of the solar science community for the previous solar maximum. The green curves show the community’s two original predictions from April 2007, with half the scientists predicting a very strong maximum and half predicting a weak one. The red curve is their revised May 2009 prediction, extended in November 2018 four years into the future.

February saw only one sunspot, and it belonged to the old solar cycle. It also occurred at the beginning of the month, and was followed by 33-day streak of blankness, into the middle of March, when a sunspot from the new cycle appeared and quickly faded.

The continuing overall lack of sunspots, from either the old or new cycle, does not mean that we are entering a new grand minimum, with no sunspots for decades (though some scientists believe we are). It does suggest however that the next solar maximum will be weak, and very likely weaker than the very weak maximum that just ended.

Why the Sun does this remains a mystery. Scientists really have no fundamental understanding of the magnetic processes that produce the Sun’s sunspot cycles. And since that cycle appears to have some effect on the Earth’s climate, it also means scientists do not yet have a fundamental understanding of the climate either.

Not that this lack of knowledge matters anymore. We are in an age of panic and certainty, based on emotion and feelings. All that matters is that many people feel they understand the climate and how the Sun works, just as everyone is sure that COVID-19 will destroy the world if we don’t shut down all human activity.

They are certain, and any additional data that illustrates that certainty is unwarranted is irrelevant and must be ignored.

Certainty however is a very dangerous thing. The universe is always more complicated than we know, and to assume we now understand all without doubt leaves us very vulnerable to some bad surprises, as well as the chance we will take actions that are foolish, inappropriate, and even downright evil.

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First launch of ULA’s Vulcan on schedule for 2021

10:35 am

Capitalism in space: According to ULA’s CEO, Tory Bruno, the company is on track to transition as planned from its Atlas 5 and Delta rockets to its new Vulcan rocket.

Just five Delta IV Heavy launches remain on the manifest, all NRO launches procured under the block buy Phase 1 methodology. Bruno expects the final Delta launch to occur in 2023 or 2024.

The workhorse of the ULA fleet, Atlas V, is expected to retire on a similar timeframe. Bruno says the launcher could be “done as early as 2022, or as late as 2024.” Atlas V will have to continue operations until its replacement, Vulcan, can be human-rated to launch the Boeing Starliner spacecraft.

…The first flight of Vulcan Centaur is on track for early 2021, with the first flight vehicle under construction, and more vehicles in flow, in ULA’s factory in Decatur, Alabama. Vulcan’s debut launch will carry the Astrobotic Peregrine lander to the moon for NASA’s Commercial Lunar Payload Services (CLPS) program. A second launch is currently planned for later that year, which will satisfy the Air Force certification requirement for Vulcan to launch military missions.

Bruno’s report is also good news for Blue Origin’s New Glenn rocket, since both will use Blue Origin’s BE-4 engine in their first stage. If ULA is on schedule, than Blue Origin also likely to be on schedule, meaning that come 2021 or so the U.S. will have at least three companies (including SpaceX) capable of putting large payloads into orbit. Moreover, Northrop Grumman is developing its OmegA rocket, which will compete for the same business.

The article also talks about the military’s launch procurement program, which supposedly will pick two of these launch companies to provide all military launches through the 2020s. That program however is certain to fail, as it will blacklist all other viable companies from bidding on military launches. I expect those companies will successfully sue and force the Space Force to accept bids from more than two companies.

And that is as it should be. Why the military wishes to limit bidding makes no sense, and is probably illegal anyway. As long as a company has a qualified rocket, its bids should be welcome.

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Manned Dragon mission targeted for May

10:18 am

Capitalism in space: According to one SpaceX official, they are now aiming for a May target date for their first manned Dragon mission to ISS, even as they will maintain a launch pace of one to two launches per month.

SpaceX president and chief operating officer Gwynne Shotwell [said] that she expects at least one to two launches per month in the near future, whether they be for customers or for SpaceX’s own internet-satellite constellation, Starlink. “And we are looking at a May timeframe to launch crew for the first time,” Shotwell continued. That launch, called Demo-2, will send NASA astronauts Bob Behnken and Doug Hurley to and from the International Space Station (ISS) aboard SpaceX’s Crew Dragon capsule.

At that pace SpaceX will complete between 12 to 24 launches for the year. They had predicted they would complete 21, so this is in line with that prediction.

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An exoplanet where it rains iron

10:12 am

Astronomers have discovered an exoplanet 640 light years away hot enough for iron to be vapor in the atmosphere and to condense out as rain.

The high-resolution spectrum reveals lots of iron vapor within the sliver of atmosphere undergoing the transition from day to night. However, this iron vapor signature is missing from the sliver of atmosphere transitioning from night to day. The astronomers think this happens because strong winds push iron vapor to the nightside, where it cools and condenses into clouds.

“This planet has a twilight zone at a temperature close to the iron condensation temperature,” Ehrenreich explains, “so the change in atmospheric composition (with iron vs. without iron) is occurring right where we are able to observe.”

Because the planet is a gas giant, there’s no surface onto which the droplets can fall, says coauthor Nuno Santos (University of Porto, Portugal). But the planet’s gravity likely pulls the clouds downward, enveloping the nightside in iron fog. The global winds then push the clouds and fog onto the dayside, where the vaporization-condensation cycle repeats again.

Very exotic, and alien, and I guarantee it is probably far more alien than we so far can guess.

You can find out more in this second more detailed article.

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ExoMars2020 rover delayed until 2022

9:43 am

The European Space Agency (ESA) today announced that they are delaying the launch of their ExoMars2020 rover mission until the next launch window in 2022

The press release says this will give them the time “necessary to make all components of the spacecraft fit for the Mars adventure.” Considering that the spacecraft’s parachutes have yet to have a successful high altitude test, that the entire spacecraft is not yet assembled, and that when they did the first thermal test of the rover the glue for the solar panel hinges failed, this seems that they need to do a lot of testing.

Overall the decision is smart. Better to give them the time to get this right then launch on time and have a failure.

At the same time, there appears to be something fundamentally wrong within the management of this project at ESA. This project was first proposed in 2001, and has gone through repeated restructurings and redesigns. Moreover, they began planning the rover for this 2020 launch in 2011, and after ten years were not ready for launch.

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House about to renew FISA with only cosmetic changes

9:34 am

The fix is in: The House is about to vote on a renewal of the Foreign Intelligence Surveillance Act (FISA), incorporating what appear to be only cosmetic changes to the law.

The deal reached by House leaders would require officers overseeing FISA applications to certify that the Justice Department has been fully informed of any issues with the accuracy of the application, and require that agencies submitting applications appoint officers to ensure the applications are compliant with the law.

The bill also includes measures to assuage concerns by Democrats and libertarians worried about government overreach in surveilling of American citizens, such as ending the National Security Agency’s to collect call detail records. It also includes measures to increase transparency, requiring the Justice Department to publish reports explaining its positions on how information is derived for FISA applications.

These are changes desired by the Democrats in the House. Or to put it another way, they are working hard to renew a law that I would call “The Law to Enable Democrats and their Allies in the Justice Department, FBI, and CIA to spy on Republicans”.

This law should expire. Trump should veto any renewal effort, no matter who writes it. It is unconstitutional., has done nothing to protect us, even as it is has been abused to violate our constitutional rights.

And even if it could be argued that the law provided the country some added security that would be lost if it expires, freedom is more important.

UPDATE: The House has passed the bill, which Senator Rand Paul (R-Kentucky) condemned as “weak sauce.”

“The ‘Deal’ on FISA is weak sauce diluted [and] made impotent by A.G. Barr. None of the reforms prevent secret FISA court from abusing the rights of Americans. None of the reforms prevent a President of either party from a politically motivated investigation. Big Disappointment!” Paul tweeted early Tuesday evening.

Paul and Sen. Mike Lee (R-Utah), who have both vocally called for sweeping reforms to FISA, are urging President Trump to veto the bill if it arrives at his desk.

Barr was first pushing for passage of a renewal that would have changed nothing in the law, making me think that his so-called investigations into the FISA corruption are probably hogwash. He might make noises about upholding the law, but so far what he has done makes him appear a willing partner in the Washington corrupt culture, working to keep the status quo.

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Big budget cut for India’s manned space program

9:01 am

India’s manned space program has received a 70% cut in funding in that country’s most recent budget, according to one news story from India.

From the first link:

The human spaceflight program of the Indian Space Research Organisation (ISRO), called Gaganyaan, received only about 30% of the funds sought by the according to the Times of India. ISRO said it will find a way around the low budget, but details were not provided in the news report.

The plan has been to launch a unmanned mission late this year or early next year, with the 5-to-7-day manned mission to occur one year later.

Based on the article from India, it appears to me that these cuts are part of the negotiation process for determining ISRO’s budget, and are not yet firm. It also appears that the government is experiencing sticker shock. It wants a manned mission, but when it was told what it would cost it balked.

I suspect that it is highly unlikely that they will be able to fly the manned mission by 2022 with these cuts. The Modi government will either have to decide to spend the money, or significantly delay its human spaceflight effort.

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Russia delays first 2020 Proton launch due to “component mismatch”

8:48 am

Russian officials yesterday announced that they are delaying the first Proton launch in 2020 from March to May in order to replace components that during tests were found to be “mismatched.”

According to [Khrunichev Space Center Director General Alexei] Varochko, quality control tests revealed mismatch of one of the components’ parameters. “In order to ensure proper serviceability and guarantee the implementation of the Khrunichev Center’s liabilities, it was decided to replace the components set, including in the Proton-M carrier rocket, which is kept at the Baikonur space center, to put Express satellites into orbit,” he said.

Nor are they having issues only with their Proton rocket. Two days ago they announced a one month delay of a Soyuz rocket, set for launch for Arianespace, because of “an off-nominal malfunction … on a circuit board” in the Freget-M upper stage. Rather than replace the component, they have decided to replace the entire stage

Proton is built by the Khrunichev facility. Freget-M is built by the Lavochkin facility. For both to have issues like this suggests once again that Russia’s aerospace industry continues to have serious quality control problems in its manufacturing processes. The one bright spot is that they are at least finding out about the problems prior to launch.

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Martian dust devil tracks come and go

1:40 pm

The changing surface of dunes on Mars
Click for full image.

Earlier image of the same dunes
Click for full image.

Cool image time! To understand what created the vastly strange and alien Martian surface, it will be necessary for scientists to monitor that surface closely for decades, if not centuries. To the right is one small example. Taken by the high resolution camera of Mars Reconnaissance Orbiter (MRO) and rotated, cropped, and reduced to post here, it shows a dune field inside a crater in the southern cratered highlands of Mars. Craters have been found to be great traps for dust and sand on Mars. Once the material is blown inside, the winds are not strong enough to lift the material out above the surrounding rims. Thus you often get giant dunes inside craters, as we see here.

What makes this location of interest to planetary scientists is the changing surface of these dunes. They have been monitoring the location since 2009. In 2013, the MRO science team released a captioned photograph, the second image to the right, also rotated, cropped, and reduced by me to match the same area in the top image. In that caption planetary scientist Corwin Atwood-Stone of the Lunar and Planetary Laboratory in Arizona wrote,

This area was previously imaged in August 2009, about two Mars years ago, and in that image dust devil tracks were also visible. However the tracks visible now are completely different from the earlier ones. This tells us that there has been at least one dust storm since then to erase the old tracks, and lots of dust devil activity to create the new ones.

Since then the MRO science team has taken repeated images of this location to monitor how the dust devil tracks change, as well as monitor possible changes to the dunes themselves, including avalanches. The newest image above shows the result of the global dust storm last year. It wiped out the dust devil tracks entirely.

The newer image was entitled, “Monitor Dune Avalanche Slopes,” but I couldn’t find any examples. Based on published research, I am sure there is something there, even if I couldn’t find them. Maybe my readers have a better eye than I.

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Astronomers more precisely estimate the diameter of neutron stars

10:53 am

Using several different techniques, astronomers now estimate that the typical neutron star will have a diameter of 11 kilometers, or about 7 miles.

What is significant about this new estimate is that if that neutron star happens to be orbiting a black hole and get pulled into it, it will be swallowed whole instead of being ripped apart.

Their results, which appeared in Nature Astronomy today, are more stringent by a factor of two than previous limits and show that a typical neutron star has a radius close to 11 kilometers. They also find that neutron stars merging with black holes are in most cases likely to be swallowed whole, unless the black hole is small and/or rapidly rotating. This means that while such mergers might be observable as gravitational-wave sources, they would be invisible in the electromagnetic spectrum.

In other words, such cataclysmic events would be largely invisible to observers.

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New inspector general report slams NASA’s SLS management

10:20 am

A new report [pdf] by NASA’s inspector general released today harshly slams the management of NASA for the never-ending cost overruns and scheduling delays that have plagued the agency’s effort to build and launch the Space Launch System (SLS).

From the report’s introduction:

Based on our review of SLS Program cost reporting, we found that the Program exceeded its Agency Baseline Commitment (ABC)—that is, the cost and schedule baselines committed to Congress against which a program is measured—by at least 33 percent at the end of fiscal year 2019, a figure that could reach 43 percent or higher if additional delays push the launch date for Artemis I beyond November 2020.

… [T]he SLS Program now projects the Artemis I launch will be delayed to at least spring 2021 or later. Further, we found NASA’s ABC cost reporting only tracks Artemis I-related activities and not total SLS Program costs. Overall, by the end of fiscal year 2020, NASA will have spent more than $17 billion on the SLS Program—including almost $6 billion not tracked or reported as part of the ABC.

The graph below, taken from page 45 of the report, illustrates the management failures here quite starkly.
» Read more

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The last cargo Dragon to berth with ISS using robot arm

9:31 am

Astronauts yesterday used the robot arm on ISS to berth SpaceX’s cargo Dragon freighter, the last time a Dragon capsule will be berthed to the station in this manner.

The successful supply deliver marked the 20th time a SpaceX Dragon cargo capsule has arrived at the space station since May 2012. The mission, known as CRS-20 or SpaceX-20, also the final flight of SpaceX’s first-generation Dragon spacecraft, which the company is retiring in favor of a new Dragon capsule designed to dock directly with the space station without needing to be captured by the robotic arm.

I could put this another way that is more embarrassing to NASA. After twenty flights, the agency has finally admitted that SpaceX can design a spacecraft that can do automatic dockings, and is now willing to allow it.

That of course is a gross simplification. Nonetheless, the successful unmanned demo flight last year of SpaceX’s crew Dragon, docking directly with ISS, has proven SpaceX can do it. And since that crew Dragon is essentially the same design for SpaceX’s future cargo Dragons, it makes sense to shift from robot-arm-berthing to direct docking for all future Dragon flights.

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