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Update on upcoming first launch of Relativity’s Terran-1 rocket

9:13 am

Link here. Relativity has been doing longer and longer static fire tests on the launchpad, building to what could be the first every full duration static fire test of a rocket, on the launchpad.

A pair of spin-start tests on Terran 1’s first stage was completed on July 18 and 21 of this year. This was followed by hot fire tests, which not only started the nine Aeon 1 engines but allowed them to reach full thrust before shutdown. The first of these hot fire tests occurred on July 27 and lasted six seconds.

Once complete engine ignition was achieved, the next goal was to work toward firing the first stage for the full duration that will be needed during the flight from liftoff to stage separation. This type of “mission duty cycle” test is usually done on dedicated test stands rather than on the launch pad, but the test stand being used in place of the launch mount at SLC-16 enabled Relativity to streamline operations and complete long-duration firings on the launch pad. “To our knowledge, no other company has ever actually done a full flight duration test on the actual launch mount, or launch pad, at Cape Canaveral,” said Relativity CEO Tim Ellis, in an August interview with NASASpaceflight.

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Once this test is completed, the rocket will be rolled back to its assembly building for check-outs, and if all is well will then be returned to the launchpad for its actual launch. No date has been set for that launch, but if it occurs before SpaceX’s Starship orbital launch, it will be the first methane-fueled rocket to reach orbit.

2 comments

India buying land for new spaceport on India’s southern tip

9:06 am

Kulasekarapattinam

The Indian government has now acquired about 80% of the land it needs for new spaceport on that country’s southern tip.

The new spaceport will be built in Tamil Nadu’s southern region. The new spaceport at Kulasekarapattinam will have some advantages over India’s current and only spaceport at Sriharikota.

Rockets launching into polar orbit from Sriharikota, Andhra Pradesh, must perform a turn manoeuvre to avoid flying over Sri Lanka. This necessitates the use of fuel and reduces the mass that can be carried into orbit. While this has little effect on large rockets, it has a negative impact on the capacity of small rockets such as the SSLV (Small Satellite Launch Vehicle) and those built by Indian start-ups.

A launch from Kulasekarapattinam will allow for a direct flight path to the polar regions (without having to fly over and around Sri Lanka), saving fuel and payload capacity.

Sriharikota’s location is much farther north, beyond the top of the map to the right. It appears this new spaceport is aimed at attracting new private smallsat rocket companies.

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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, any other book seller, or direct from my ebook publisher, ebookit. 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

Perseverance deposits first core sample for pickup later

8:57 am

Perseverance's location December 21, 2022
Click for interactive map.

The Mars Perseverance rover has now deposited its first core sample on the floor of Jezero Crater for pickup later by a future Mars helicopter for eventual return to Earth.

A titanium tube containing a rock sample is resting on the Red Planet’s surface after being placed there on Dec. 21 by NASA’s Perseverance Mars rover. Over the next two months, the rover will deposit a total of 10 tubes at the location, called “Three Forks,” building humanity’s first sample depot on another planet. The depot marks a historic early step in the Mars Sample Return campaign.

The blue dot on the map to the right shows this location. The green dot shows Ingenuity’s present position. The red dotted line the rover’s future travel route.

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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.

December 21, 2022 Quick space links

3:17 pm

Courtesy of BtB’s stringer Jay.

 

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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

InSight mission ended

3:01 pm

Location of InSight's largest quakes
The white patches mark the locations on Mars of the largest quakes
detected by InSight

NASA today announced that it has officially ended the mission of the InSight lander on Mars.

Mission controllers at the agency’s Jet Propulsion Laboratory (JPL) in Southern California were unable to contact the lander after two consecutive attempts, leading them to conclude the spacecraft’s solar-powered batteries have run out of energy – a state engineers refer to as “dead bus.”

NASA had previously decided to declare the mission over if the lander missed two communication attempts. The agency will continue to listen for a signal from the lander, just in case, but hearing from it at this point is considered unlikely. The last time InSight communicated with Earth was Dec. 15.

Other than the success of InSight’s seismometer, this project was mostly a failure. Its launch was delayed two years, from 2016 to 2018, because of problems with the original French seismometer, forcing JPL to take over. Then its German-made mole digger failed to drill into the Martian surface, causing the failure of the lander’s second instrument, a heat sensor designed to measure the interior temperature of Mars.

Fortunately the seismometer worked, or otherwise it would have been a total loss. That data has told us much about Mars and its interior.

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Webb in safe mode intermittently during the past two weeks

2:49 pm

According to a short update today from the science team, the Webb Space Telescope went into safe mode on December 7, 2022 and was in that state “intermittently” through December 20, 2022 because of a software issue.

The James Webb Space Telescope resumed science operations Dec. 20, after Webb’s instruments intermittently went into safe mode beginning Dec. 7 due to a software fault triggered in the attitude control system, which controls the pointing of the observatory. During a safe mode, the observatory’s nonessential systems are automatically turned off, placing it in a protected state until the problem can be fixed. This event resulted in several pauses to science operations totaling a few days over that time period. Science proceeded otherwise during that time. The Webb team adjusted the commanding system, and science has now fully resumed.

It would be nice to have a more detailed description of that “software fault”, and how it affected the attitude control system. Such things can be very trivial, or they can be disastrous. NASA has a responsibility to tell the public which.

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The Wuhan panic underlines how scientists have abandoned the search for truth

1:50 pm

Modern science
Modern science

For almost three years I have been documenting endlessly the utter failure of almost every policy imposed by politicians and government health officials in response to the COVID epidemic. From masks to social distancing to lockdowns to COVID shot mandates, none of their draconian rules have done anything to stop the spread of the Wuhan flu, which was always impossible anyway.

Even worse than these bad policies however has been the behavior of the scientific community the past three years. This community has increasingly put politics and narrative above the search for truth, a focus that signals a terrible cultural change that is so horrible its consequences can barely be measured.

To understand this tragedy we must first go back to what science and government once believed about epidemics. The traditional infectious disease policies that doctors and governments had successfully used for more than a century, based on real research and an honest appraisal of the facts by scientists, always recognized that it was impossible to “stop the spread” of a respiratory illness. What worked best was to protect the aged and sick, whom such diseases could kill, while allowing the virus to quickly spread through the rest of the healthy population in order to quickly create a herd immunity that would choke off the virus’s early most virulent strains. The disease would then mutate to milder forms — essentially a cold — that the aged and weak could fight off.

The virus of COVID-19 has done exactly this, but along the way it killed many more older and sick people then necessary, because today’s modern petty tyrants — encouraged by many scientists — decided instead to toss that past knowledge out. Herd immunity was delayed by the lockdown policies, and most governments did little to protect the aged and sick, with some governments even acting to introduce the virus to these threatened populations.

To underline the failure of these policies, here are just a small recent sampling of the growing research outlining the failures of masks, social distancing, and lockdowns:
» Read more

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The same region on Ganymede, as seen by Voyager-1 in 1979 and Juno in 2021

11:30 am

Ganymede compared between Voyager-1 and Juno
Click for full image.

When the Jupiter orbiter Juno did a close pass of the moon Ganymede on June 7, 2021, it took four pictures, covering regions mostly photographed for the first time by Voyager-1 in its close fly-by in 1979.

Scientists have now published the data from this new fly-by. Though Juno’s higher resolution pictures revealed many new details when compared with the Voyager-1 images from four decades earlier, the scientists found no changes. The comparison image, figure 2 of their paper, is to the right, reduced and sharpened to post here.

A flicker comparison between the registered JunoCam and Voyager reprojected mosaics revealed no apparent new impact features. Given the high albedo of fresh craters on Ganymede, with high albedo ejecta deposits two or three times the diameter of the craters themselves, we argue that new craters as small as 250 m diameter would be detectable in images at these 1 km per pixel scales. Extrapolating Ganymede cratering rates from Zahnle et al. (2003) below 1 km, the probability of JunoCam observing a new crater over 12.2 million km2 in 42 years is 1 in 1500, consistent with none being observed.

In other words, at these resolutions finding no new impacts is not a surprise.

Of the new features detected, the Juno images could see more details in the bright rays emanating from the crater Tros (in the lower center of both images), and thus found “…terrain boundaries previously mapped as ‘undivided’ or as ‘approximate’, several large craters, and 12 paterae newly identified in this region.”

Paterae resemble craters but are thought to be a some form of volcanic caldera. Their geological origin however is not yet completely understood.

The paper’s conclusion is actually the most exciting:

The insight gained from this handful of images makes it likely in our opinion that new observations from the upcoming JUICE and Europa Clipper missions will revolutionize our understanding of Ganymede.

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SpaceX and the Ukraine resolve funding issues for Starlink terminals

9:39 am

According to a Ukrainian official, the Ukraine has worked out a method to pay for another 10,000 Starlink terminals by obtaining funding from several European nations.

Ukraine’s deputy prime minister Mykhailo Fedorov has announced that over 10,000 additional Starlink terminals will be sent to Ukraine in the coming months, confirming that issues regarding how to fund the country’s critical satellite internet service have been resolved.

The governments of several European Union countries are ready to share payment said Fedorov (who is also Ukraine’s minister for digital transformation) in an interview with Bloomberg, affirming that “As of now all financial issues have been resolved.” Fedorov did not publicly identify which governments are contributing towards the payments but confirmed that there’s currently no contract in place and that Ukraine will need to find additional funding by spring 2023.

Elon Musk had threatened to end Starlink support without some form of payment. It appears his threat, which was almost immediately retracted, forced some action by these governments.

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Kepler’s first discovered exoplanet is spiraling into its aging star

9:33 am

Measurements of the orbit of first exoplanet discovered by the Kepler space telescope have determined that its orbit is very slowly shrinking, and that it will eventually spiral into its aging sun.

In the case of Kepler-1658b, according to the new study, its orbital period is decreasing at the miniscule rate of about 131 milliseconds (thousandths of a second) per year, with a shorter orbit indicating the planet has moved closer to its star.

Detecting this decline required multiple years of careful observation. The watch started with Kepler and then was picked up by the Palomar Observatory’s Hale Telescope in Southern California and finally the Transiting Exoplanet Survey Telescope, or TESS, which launched in 2018. All three instruments captured transits, the term for when an exoplanet crosses the face of its star and causes a very slight dimming of the star’s brightness. Over the past 13 years, the interval between Kepler-1658b’s transits has slightly but steadily decreased.

The scientists think tidal forces are causing the orbit to shrink. The star itself is old and beginning to expand as it evolves towards its own stellar death.

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ISS spacewalk postponed because controllers had to maneuver station to avoid space junk

9:26 am

An American spacewalk to install new solar panels to ISS yesterday was suddenly scrubbed when ground controllers identified a piece of space junk that was going to fly within a quarter mile of the station.

While flight control teams were preparing for today’s U.S. spacewalk, updated tracking data on a fragment of Russian Fregat-SB upper stage debris showed a close approach to station. Based on this new data, flight control teams directed the crew to stop spacewalk preparations as the ground team stepped into procedures to perform a Pre-Determined Debris Avoidance Maneuver (PDAM.)

Russian controllers successfully used the engines on a docked Progress freighter today to complete the avoidance maneuver, firing those engines for 10 minutes and 21 seconds.

It appears the station was never in any danger.

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Virgin Orbit finally receives launch license from British bureaucracy

9:15 am

We’re here to help you! The UK’s Civil Aviation Authority has finally issued a license to Virgin Orbit to launch nine satellites from a Cornwall airport.

The launch date however has not yet been set, because it appears licenses for the nine satellites still need to be issued, though according to the article at the link, approval appears “imminent.”

The press release from the UK Space Agency brags about the speed in which this license was issued:

The UK Civil Aviation Authority granted the licences within 15 months, well within the expected timescales for these types of licences, putting the UK’s regulatory framework on a competitive footing with other international space regulators.

Hogwash. If the licensing process for every commercial launch in the UK is going to take this long, rocket companies are going to quickly find other places to launch from.

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Launch failure for Arianespace’s Vega-C rocket

8:58 am

The second launch of Arianespace’s Vega-C rocket, an upgrade from the Vega rocket that has launched previously, failed yesterday when a problem with the second stage occurred at 2 minutes 27 seconds into the flight.

Designated Vega Vehicle 22 (VV22), the rocket was the second Vega flight of the year and Arianespace’s fifth mission of 2022. VV22 was originally set to launch in November 2022, but a component in the upper composite in the payload fairing needed to be replaced. The launch failure occurred during stage 2 flight, with CEO Stephane Israel citing an “underpressure” indicated during that stage’s burn.

I have embedded video of the launch below, cued to T-30 seconds, just before launch. The rocket was carrying two Earth observation satellites built by Airbus.

The rocket itself has four stages, with the failure occurring when the second stage clearly did not maintain the rocket’s correct path. Though it appeared to be working, it was not providing enough power, so instead of continuing upward into space, the rocket fell back into the atmosphere.
» Read more

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December 20, 2022 Quick space links

3:51 pm

Courtesy of BtB’s stringer Jay.

 

  • Is Virgin Orbit a Phantom in the UK?

    • Interesting article, but in a word, the answer has always been “Yes!” Virgin Orbit wants to launch from Cornwall in the UK, but its factories and management is all U.S. based. Since its launch vehicle is an airplane, it is not likely to bring much else to the UK for a very long time. For anyone in Britain to think otherwise is to live in a fantasy world.

 

 

 

 

Three quick links providing graphics of China’s next generation crew spacecraft, suggesting it will be larger. None should be taken very seriously, as yet.

 

 

2 comments

Pushback: Blacklisting Virginia Tech soccer coach loses effort to get lawsuit dismissed

2:10 pm

Kiersten Hening, blacklisted by Virginia Tech
Kiersten Hening

Bring a gun to a knife fight: Charles Adair, the soccer coach for the woman’s team at Virginia Tech, has lost in his effort to dismiss a lawsuit against him by former player, Kiersten Hening, who he blacklisted from playing because she refused to kneel in support of Black Lives Matter during the National Anthem before a game.

Hening filed a lawsuit against Virginia Tech and Coach Adair in 2021 but Virginia Tech immediately attempted to file a motion to have the suit tossed. The athlete stated that when she refused to take part in the kneeling, which at the time was a virtue signal statement indicating public support for the Black Lives Matter movement, Adair began to insult and demean her as well as limiting her time to play during matches.

According to [U.S. District Judge Thomas T. Cullen], “Hening, who had been a major on-field contributor for two years prior to the 2020 season, also asserts that Adair removed her from the starting lineup or the next two games and drastically reduced her playing time in those games because she had engaged in this protected First Amendment activity. As a result, Hening resigned from the team after the third game of the season.” [emphasis mine]

You can read Cullen’s full decision here [pdf].

Cullen’s decision is intriguing not only because he not only threw out Adair’s effort to get the lawsuit dismissed, he also threw out Adair’s claim that he deserves “qualified immunity” as a public official. » Read more

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A congregation of Martian dust devils

12:13 pm

A congregation of Martian dust devils
Click for full image.

Cool image time! The photo to the right, rotated, cropped, reduced, and sharpened to post here, was taken on September 9, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a spot on Mars where, as indicated by the many many tracks, dust devils routinely develop and travel across the surface.

Though this whole region appears to favor dust devils, within it are places that are even more favored. For example, the number of tracks on the northern and eastern slopes of that small hill at center left practically cover the surface, while the hill’s western and southern slopes are almost untouched.

Both the overview map and the global Mars map below provide the full context.
» Read more

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Perseverance’s planned route up onto the Jezero Crater delta

9:55 am

Perseverance's future route onto the delta
Click for original image.

Even as the Perseverance science team prepares to cache the ten first core samples on the surface of Mars for later pickup by a future Mars helicopter for return to Earth, they have also released the planned route they intend to follow as they drive the rover up onto the delta that flowed into Jezero Crater in the distant past.

The black line on the map to the right shows that route, with the black dots indicating points in which further core samples will likely be taken. The red dot indicates Perseverance’s present position, with the white line indicating its past travels. The green dot marks Ingenuity’s present position.

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Rocket Lab reschedules first Wallops launch to January

9:28 am

Having had to scrub the launch on December 18th and December 19th due of weather, Rocket Lab has now officially rescheduled its first Wallops launch to January.

The move of the planned launch window from December 2022 to early 2023 was driven by weather and the additional time that the National Aeronautics and Space Administration (NASA) at Wallops and the Federal Aviation Administration (FAA) required to complete essential regulatory documentation for launch. The delay in documentation left only two days in the originally scheduled 14-day launch window and both of those final remaining days were unsuitable for launch due to bad weather. The Mid-Atlantic Regional Spaceport within NASA’s Wallops Flight Facility is now closed for launch activity for the remainder of the December due to holiday airspace restrictions, preventing further launch attempts in 2022.

Rocket Lab originally wanted to launch from Wallops two years ago, but has been repeatedly stymied by government red tape. At that time the company wanted to use the software of its own flight termination system, a system that it has successfully used in New Zealand more than two dozen times, including several times where launch failures actually required the system to destroy the rocket. NASA said no, and instead insisted on spending two years apparently creating its own software which also requires the added presence of NASA officials during launch.

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Astronomers identify what they think are the Milky Way’s first stars

9:17 am

The concentration of ancient stars in the Milky Way's core region
The concentration of ancient stars in the Milky Way’s core region.
Click for originial image.

The uncertainty of science: Using data produced by the European space telescope Gaia, combined with computer analysis, astronomers think they have identified the Milky Way’s first stars, all located within 30,000 light years of the galaxy’s core region.

The researchers began by locating a sample of two million bright red giant stars with the right spectra, using computer neural network machine learning.

With that sample, it proved comparatively easy to identify the ancient heart of the Milky Way galaxy – a population of stars that Rix has dubbed the “poor old heart”, given their low metallicity, inferred old age, and central location. On a sky map, these stars appear to be concentrated around the galactic center. The distances conveniently supplied by Gaia (via the parallax method) allow for a 3D reconstruction that shows those stars confined within a comparatively small region around the center, approximately 30,000 light-years across

The stars in question neatly complement Xiang’s and Rix’s earlier study of the Milky Way’s teenage years: They have just the right metallicity to have brought forth the metal-poorest of those stars that, later on, formed the Milky Way’s thick disk. Since that earlier study provided a chronology for thick-disk formation, this makes the ancient heart of the Milky Way older than about 12.5 billion years.

While the uncertainties of this scientific result are huge, it still helps identify the beginnings of the Milky Way, its initial size, and the kind of stars that existed here at that time.

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Russians preparing replacement Soyuz for launch to ISS

8:57 am

ISS as of November 28, 2022
ISS after November 28, 2022 docking of unmanned Dragon freighter.
MS-22 is the Soyuz capsule that is leaking.

Though a final decision will not be made until the completion on December 27, 2022 of their investigation into the leak in the coolant system of the Soyuz capsule docked to ISS, the Russians have begun preparing a replacement Soyuz for launch.

A backup spacecraft to bring cosmonauts aboard the International Space Station (ISS) back to Earth will be prepared by February 19 and the spaceship is currently undergoing tests at the Baikonur spaceport, Roscosmos Chief Yury Borisov said on Monday.

That replacement Soyuz was supposed to launch in March, which means they can only accelerate its preparation by about a month. Assuming it is determined that the leaking capsule cannot be used safely as a lifeboat, this means that until February the station does not have its standard complement of lifeboats.

Should something happen that requires an immediate evacuation before February, it might be possible to get an extra three people into the two Dragon capsules presently docked to ISS, since each was designed to carry a maximum of six passengers, though generally four is considered their maximum capacity.

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InSight fails to respond during scheduled communications session

8:36 am

InSight's daily power levels as of December 12, 2022

Since December 15, 2022 engineers have been unable to contact the Mars InSight lander, which likely means its power levels have finally fallen so low that the spacecraft is no longer functioning.

On Dec. 18, 2022, NASA’s InSight did not respond to communications from Earth. The lander’s power has been declining for months, as expected, and it’s assumed InSight may have reached its end of operations. It’s unknown what prompted the change in its energy; the last time the mission contacted the spacecraft was on Dec. 15, 2022.

The graph to the right shows the decline in InSight’s power levels since May. The atmosphere has been clearing following the dust storm in October, indicated by the drop in the tau level. Normal tau levels outside of dust storm season are around 0.6-0.7. It is therefore likely that as this dust cleared, it also settled on InSight’s solar panels, and reduced their ability to generate power to the point the spacecraft ceased functioning.

This is very much the same thing that put the rover Opportunity out of business in 2019.

According to this update, engineers are going to continue to try to contact the lander, but it is likely that this effort will end in about a week, should no contact be successful.

2 comments

December 19, 2022 Quick space links

3:01 pm

Courtesy of BtB’s stringer Jay.

 

 

 

6 comments

Today’s blacklisted American: Law firm fires lawyer of 44 years for expressing the wrong opinion

1:23 pm

Hogan Lovells: blacklister

They’re coming for you next: The law firm Hogan Lovells recently fired a partner lawyer with 44 years of experience, Robin Keller, simply because she dared at a company meeting to express some rational reasons why Roe v Wade should have been overturned.

As Keller wrote, “I was invited to participate in what was billed as a ‘safe space’ for women at the firm to discuss the decision. It might have been a safe space for some, but it wasn’t safe for me.”

She recounts how “Three weeks later I received a letter stating that the firm had concluded that my reference to comments labeling black abortion rates genocide was a violation of the antiharassment policy.”

Apparently, “a participant complained that she could not breathe and others called her a racist.” These crybabies then demanded she be fired, and the company quickly acquiesced.

The company’s blackballing of Keller should surprise no one. A quick review of Hogan Lovells’ website shows us that this is a very politically correct leftist law firm. On its Diversity, Equity & Inclusion website, the company proudly tells us that:
» Read more

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Big sink near the Martian south pole

12:38 pm

Big sink near the Martian south pole
Click for full image.

Cool image time! The photo to the right, rotated, cropped, reduced, and sharpened to post here, was taken on September 12, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The image is rotated so that south is at the top. The science team labels this a “subsidence feature,” or in plain English, a sinkhole.

Its perfectly circular shape, plus its central peak, strongly suggests we are looking at an impact crater. However, the lack of a raised rim of debris, produced by the ejecta from the impact, raises questions about this conclusion, and is one reason why the scientists think this is a sinkhole instead. Its shape however could be telling us that this sink is simply mirroring the existence of a buried crater.

The overview map below as always provides more context.
» Read more

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Could the Apollo 11 lunar module still be orbiting the Moon?

11:55 am

According to one researcher, at least two of the Apollo lunar modules that took astronauts up and down from the Moon could still be in lunar orbit, though their location is presently unknown.

His paper outlining the possible survival of the Apollo 11 LM Eagle can be found here. From his abstract:

The Apollo 11 “Eagle” Lunar Module ascent stage was abandoned in lunar orbit after the historic landing in 1969. Its fate is unknown. Numerical analysis described here provides evidence that this object might have remained in lunar orbit to the present day. The simulations show a periodic variation in eccentricity of the orbit, correlated to the selenographic longitude of the apsidal line. The rate of apsidal precession is correlated to eccentricity. These two factors appear to interact to stabilize the orbit over the long term.

More details here.

Hat tip to reader Mike Nelson, who sent me this story today. I am certain I reported it previously, but searching on Behind the Black failed to find it, so I decided to post again. As the researcher concludes:

Wouldn’t it be amazing if we could find this amazing little vessel and bring her back to Earth!!!!

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