A glacier filled canyon on Mars?

11:26 am

Large glacial flow exiting Mamers Valles
Click for full image.

The photo to the right, rotated, cropped, and reduced to post here, was taken on September 9, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows the northern half of a 15-mile wide canyon on Mars whose floor appears to be completely filled by a glacier. The full picture shows both the north and south rims, and captures the canyon’s outlet from the southern cratered highlands into the chaotic terrain of Deuteronilus Mensae, the region of Mars I like to call glacier country. This region of canyons and mesas forms the transition zone down to the northern lowland plains, and is a region where almost every MRO image shows glacial-type features.

The size and age of this glacial feature is what makes it stand out. First, note the craters on its surface. The glacier has to be quite old and inactive for a long time for those craters to still exist as they appear. Any movement would have distorted them, and they show little distortion.

The overview map below gives a sense of this glacier’s size.
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NASA targets Jan 17th for full static fire test of SLS core stage

8:34 am

After analyzing the data from an aborted fueling dress rehearsal, NASA engineers have decided they understand and have fixed the issue that caused the abort and have now scheduled the full static fire test of SLS’s core stage for January 17th.

NASA conducted the seventh test of the SLS core stage Green Run test series – the wet dress rehearsal – on Dec. 20 at NASA’s Stennis Space Center near Bay St. Louis, Mississippi and marked the first time cryogenic, or super cold, liquid propellant was fully loaded into, and drained from, the SLS core stage’s two immense tanks. The wet dress rehearsal provided structural and environmental data, verified the stage’s cryogenic storage capabilities, demonstrated software with the stage’s flight computers and avionics, and conducted functional checks of all the stage’s systems. The end of the test was automatically stopped a few minutes early due to timing on a valve closure. Subsequent analysis of the data determined the valve’s predicted closure was off by a fraction of a second, and the hardware, software, and stage controller all performed properly to stop the test. The team has corrected the timing and is ready to proceed with the final test of the Green Run series.

…The upcoming hot fire test will fire all four of the stage’s RS-25 engines simultaneously for up to eight minutes to simulate the core stage’s performance during launch. After the firing at Stennis, the core stage for SLS will be refurbished and shipped on the agency’s Pegasus barge to NASA’s Kennedy Space Center in Florida. The stage will then be assembled with the other parts of the rocket and NASA’s Orion spacecraft in preparation for Artemis I, the first integrated flight of SLS and Orion and the first mission of the agency’s Artemis program.

The agency had been hoping to complete this test series before the end of 2020. Whether the delay will effect the planned launch date in November is unclear. I suspect they are already anticipating another postponement, in that this press release strangely makes no mention of that launch date.

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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, 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

Tianwen-1 to arrive in Mars orbit February 10

4:03 pm

The new colonial movement: China’s space agency, CNSA, today announced that its first Mars orbiter/lander/rover, Tianwen-1, will arrive in Mars orbit on February 10th, with the lander/rover dropping to the surface in May.

After entering orbit, Tianwen-1 will begin to prepare for a landing attempt of the mission’s rover. The orbiter will begin imaging the main candidate landing site within the huge impact basin Utopia Planitia, to the south of NASA’s Viking 2 landing site.

Getting ready for the attempt will take time however, with CNSA stating that the landing won’t take place until May.

At the moment they say that all systems are working as planned, and that they have one more course correction, the fourth, to do before entering orbit.

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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.

Updates on Starship development: next 50K foot flight this weekend?

11:22 am

Two different updates yesterday and today on the development of Starship by SpaceX suggest strongly that the company is aiming for its next test flight to about 50,000 feet as early as this coming weekend.

The second story notes how the company has apparently decided it was not worthwhile keeping much of the debris left over from the crash of the eighth Starship prototype after its successful test flight on December 9th. They have instead focused entirely on clearing the landing pad as quickly as possible, even if it meant destroying some of the prototype’s remains.

The first story outlines the ongoing pressure tests for the ninth prototype, now on the launchpad, and how those tests have so far proceeded very smoothly. All that remains is SpaceX’s standard dress rehearsal countdown ending in a static fire test of the prototype. This is presently scheduled for tomorrow. Once it is accomplished, the test flight can follow quickly, probably no more than a week later, depending on weather, the data from the static fire test, and the innumerable uncertainties that routinely occur in a robust test program such as this.

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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

China targets 40-plus launches in ’21

3:56 pm

The new colonial movement: China’s space agency announced today that it is aiming to complete at least 40 launches in 2021.

A terse summary of the report in a CASC press release (Chinese) stated that missions related to the Chinese Space Station complex would be among the planned 40-plus launches. Recent reports state that the space station core module will be launched in the coming months, followed by the Tianzhou-2 cargo vessel and Shenzhou-12 crewed missions. The missions will require Long March 5B and Long March 7 launches from Wenchang and a Long March 2F launch from Jiuquan in the Gobi Desert.

Other major highlighted activities include the Tianwen-1 Mars spacecraft, which is due to enter Mars orbit around Feb. 10 with a rover landing attempt to follow in May. Development work will focus on the two experiment modules for the Chinese Space Station and, notably, crewed lunar exploration. No further details on the latter were provided but earlier indications are available.

Assuming they experience no major launch failures, 2021 should be a ground-breaking year for China.

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A Martian “glacier” made of volcanic ash

2:19 pm

A Martian
Click for full image.

Of the numerous cool images I’ve posted on Mars, many have documented the growing evidence that in the mid-latitudes of the Red Planet are many buried glaciers of ice.

Today’s cool image to the right, rotated, cropped and reduced to post here, shows something that at first might resemble the features one would expect from an ice glacier, but in reality is actually a flow of volcanic ash being blown almost like a river, with the prevailing winds blowing from the south to the north.

The photo was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on November 1, 2020. The location, very close to the equator and in the transition zone dubbed the Cerberus Plains, is also smack dab between Mars’s biggest volcanoes, a region I like to dub Mars’s volcano country. The overview map below gives the context.
» Read more

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Sunspot update: December sunspot activity once again higher than predicted

1:11 pm

The uncertainty of science: It is time to once again take a look at the state of the Sun’s on-going sunspot cycle. Below is NOAA’s January 1, 2021 monthly graph, documenting the Sun’s monthly sunspot activity and annotated by me to show previous solar cycle predictions.

The ramp up to solar maximum continued in December. Though there was a drop from the very high activity seen in November, the number of sunspots in December still far exceeded the prediction as indicated by the red curve.

» Read more

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Is the ultimate Republican Party failure theater about to happen?

12:30 pm

The dead Constitution

For the past thirty years the Republican Party has been amazingly consistent in almost every political battle put before it by the increasingly leftist and radical Democratic Party. Almost every single time, the leaders of this so-called conservative political party have put on a big show of resisting the leftist and radical proposals put forth by Democrats, only in the end to back down, making a deal that allows those policies to take effect in some manner or another.

I am not sure who originally coined the term, but in recent years this incompetence has often been called “failure theater.” The Republican Party justifies its failures by citing the big theatrical fight they put on. They then promise they will fight harder next time, only to fail again. And again. And again.

This failure theater has been going on repeatedly for decades, since Ronald Reagan was president. Then Donald Trump came along. Unlike the establishment Republicans who ran for president since Reagan (Bush Sr., Dole, Bush Jr., McCain, Romney), Trump generally does not back down easily. He does not participate in failure theater. When he fights he fights to win, which has made the corrupt leadership in the Republican Party very uncomfortable for the past four years.
» Read more

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Data scientists: In PA more than 400K Trump votes removed during tabulation

9:51 am

A careful review of the tabulation process by data scientists of the tabulation of votes in Pennsylvania during the November 3rd election has found numerous examples, totaling more than 432,000 votes, where Trump’s total went down, even though the tabulation process should never decrease, only stay flat or increase as the votes are counted.

According to an analysis by the Data Integrity Group, obtained exclusively by The Epoch Times, votes for Trump—from both Election Day and mail-in ballots—were removed from the totals in at least 15 counties. Time-series election data shows Trump’s votes decrementing in various counties at numerous time points instead of increasing as would be expected under normal circumstances.

The group said that Election Day vote removals happened during the vote tabulation process in at least 15 counties, including Lehigh County, Chester County, Allegheny County, Armstrong County, Westmoreland County, Northhampton County, Delaware County, Montgomery County, Lackawanna County, Dauphin County, Pike County, Carbon County, Washington County, Erie County, and Luzerne County. Meanwhile, absentee vote removals happened in Allegheny County, Chester County, and Lehigh County.

At least 432,116 votes—213,707 election day votes and 218,409 absentee votes—were removed in total.

“There were vote movements across all candidates. However, we did not see the same type of negative decrements to any of the [other] candidates that we saw with President Trump’s tallies, and they happened repeatedly with no explanation,” Lynda McLaughlin, a member of the group, told The Epoch Times.

The video at the link shows this widespread activity very clearly.

The removal of a handful of votes here and there might make sense, as election officials review the ballots and reject some for various legitimate reasons. Such action however should only remove a small number, and the changes will normally occur for both candidates. For so many votes to be removed solely from one candidate, Trump, is beyond suspicious. Moreover, election officials have so far failed to provide any reasonable explain these subtractions.

The most damning aspect of these findings, along with similar findings in Georgia and Arizona, is the unwillingness and even outright stonewalling by election officials to investigate anything. If these vote removals are justified, one would think they would move quickly to allow others to examine the data closely, and provide detailed explanations for them all.

Instead, they stonewall, resist, and block any investigation.

And in Georgia, where the state legislature has mandated a forensic audit, shots have now been fired at the auditors.

The election was stolen. Whether you voted for Trump or Biden it matters not. It now appears that government officials can and will manipulate the vote totals to make sure their choice wins every time. Your vote no longer means anything.

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Eleven senators announce decision to challenge election results

11:43 am

A group of eleven senators, led by Senator Ted Cruz (R-Texas) today announced that they will challenge the election results in the disputed states, demanding that Congress set up a commission to investigate the results and prove them legitimate before certification. From their statement:

To wit, Congress should immediately appoint an Electoral Commission, with full investigatory and fact-finding authority, to conduct an emergency 10-day audit of the election returns in the disputed states. Once completed, individual states would evaluate the Commission’s findings and could convene a special legislative session to certify a change in their vote, if needed.

“Accordingly, we intend to vote on January 6 to reject the electors from disputed states as not ‘regularly given’ and ‘lawfully certified’ (the statutory requisite), unless and until that emergency 10-day audit is completed.

This group joins Senator Josh Hawley (R-Kansas), who has already announced he will vote against certification, and about 140 House Representatives, who have said the same.

Their statement is thoughtful and detailed, not an emotional soundbite. It also states the following:

We are not naïve. We fully expect most if not all Democrats, and perhaps more than a few Republicans, to vote otherwise. But support of election integrity should not be a partisan issue. A fair and credible audit-conducted expeditiously and completed well before January 20-would dramatically improve Americans’ faith in our electoral process and would significantly enhance the legitimacy of whoever becomes our next President. We owe that to the People.

These are matters worthy of the Congress, and entrusted to us to defend. We do not take this action lightly. We are acting not to thwart the democratic process, but rather to protect it. And every one of us should act together to ensure that the election was lawfully conducted under the Constitution and to do everything we can to restore faith in our Democracy. [emphasis mine]

That election integrity is now a partisan issue is the real problem. There are more than enough reasonable allegations and evidence suggesting widespread fraud in the disputed states of Pennsylvania, Georgia, Michigan, Wisconsin, and Arizona, and no election should be accepted until those allegations are investigated properly. Otherwise no one is ever going to trust any election again.

And it does not matter who wins. If a proper investigation debunks the allegations and calls Biden the winner, then so be it. Our goal should not be keeping Trump in office, but to make sure the voting process is fair, honest, and reliable.

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Data Scientists: Outright fraud in Georgia election

11:23 am

Below is the testimony this week in front of the Georgia state senate from three data scientists analyzing the Dominion computer systems and the November 3rd raw vote tally data. Watch it, please. As one of the three scientists bluntly said,

There was fraud in Georgia’s election. We can prove it with data. and because we can prove it with data the voting will of the voters of Georgia is not reflected in what was certified by the secretary of state.

They found three very shocking facts. First and most important, in a system that should only be tabulating votes, so that the numbers only go up, they found more than forty examples where the numbers for Trump went down. As another scientist noted, “There is no reason that at any point that something should be subtracted.”

Worse, they also found that Biden’s numbers would then go up at the same time, by the exact same amount. The total votes affected exceeded 200K.

In other words, votes were being switched.

Second, they found that the computer system too easily allows a human access to the data, and worse, permits that human to make wholesale changes, with no oversight. Their testimony confirmed previous video evidence by one election supervisor in other testimony.

Third, they found that the Dominion system was specifically designed to destroy the original ballot whenever that ballot was reviewed and its vote adjusted or changed by that human. This means that any later audit is worthless, as it cannot go back and compare the original vote with the final software vote.

I found out about this particular testimony from a report by Dilbert cartoonist, Scott Adams, who after watching it concluded, “Looks like Trump won.”

After this and other testimony, including another computer expert who during the testimony was able to hack into the Dominion systems presently tabulating on-going polling for the senate, even though we have been told this was impossible, it is very clear that the results from the Georgia November election are untrustworthy, likely fraudulent.

At a minimum they must be reviewed entirely. More properly, they should be decertified.

This evidence also raises legitimate questions about the totals tabulated by Dominion machines in any other state.

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Auld Land Syne – Freedom mix

6:01 pm

An evening pause: This mix was apparently put together just after 9/11, and includes many of the most iconic sound-bites from the 20th century. One of the last lines however must speak to the new 21st century, as it appears many Americans have forgotten what it means to be an American.

“We’re not gonna be stopped! We’re not gonna be deterred! We’re not gonna stay at home! We’re not gonna be afraid!

“We’re gonna live our lives as Americans!”

God bless. Let us work to return freedom to America in 2021.

Auld Lang Syne – (Freedom mix) from Don Krasley on Vimeo.

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The state of the global rocket industry in the 21st century

12:23 pm

With the year of 2020 coming to an end, it is time to look back to see how the world’s rocket industry fared in what was a truly difficult year for most. And with the 21st century now one fifth over, it is also time to take a wider view, to see what the trends have been for space exploration during this new century, and to see where those trends might lead.

Below is my annual updated table showing all successful orbital launches by every nation and company, beginning in 2000. While the table in my 2019 report last year had gone back to 1990, I decided to shorten the graph to just the 21st Century, in order to better focus on that century in particular.

» Read more

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Musk: Super Heavy will land on launchpad, caught by launch tower

9:16 am

Capitalism in space: In a series of tweets yesterday SpaceX founder Elon Musk revealed that the company is considering landing Starship’s first stage, Super Heavy, on its launchpad but rather than use landing legs it will be caught by the launch tower.

Instead, Musk says that SpaceX might be able to quite literally catch Super Heavy in mid-air, grabbing the booster before it can touch the ground by somehow slotting an elaborate “launch tower arm” underneath its steel grid fins. Although such a solution sounds about as complex and risky as it gets, it would technically preclude the need for any and all booster recovery infrastructure – even including the legs Super Heavy would otherwise need.

While true, catching Super Heavy by its grid fins would likely demand that control surfaces and the structures they attach to be substantially overbuilt – especially if Musk means that the crane arm mechanism would be able to catch anywhere along the deployed fins’ 7m (23 ft) length. Even more importantly, it seems extraordinarily unlikely that such a complex and unproven recovery method could be made to work reliably on the first one or several tries, implying that early boosters will still need some kind of rudimentary landing legs.

The idea is to save weight on the booster. It also would speed its reuse, as there would no longer be a need to transport it from a landing pad back to the launchpad.

Whether this will work will depend on the accuracy of SpaceX’s vertical landing software. That the company has repeatedly proven, from almost the first time it tried it, that it can bring its rockets down exactly where it intends suggests they will be able to be as accurate as necessary.

Nonetheless, expect more than a few launchpad crashes as they work out the kinks on another audacious engineering concept.

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The seasonal cloud over Arsia Mons on Mars

9:21 pm

Water-ice cloud over Arsia Mons
The cloud as seen in 2018.

Scientists have now documented the seasonal nature of the strangely elongated cloud that was first spotted in 2018 above the giant volcano Arsia Mons (the southernmost volcano of the three volcanoes east of Olympus Mons).

From their abstract:

We find that the AMEC [Arsia Mons Elongated Cloud] repeated regularly each morning for a number of months, and that it is an annually‐repeating phenomenon that takes place every Martian Year around the southern hemisphere spring and summer. The AMEC follows a rapid daily cycle: it starts to expand from Arsia Mons at dawn at an altitude of about ∼45 km, and for ∼2.5 hours it expands westward as fast as 170 m/s (around 600 km/h). The cloud then detaches from Arsia Mons and evaporates before noon. In previous Martian Years, few observations of this phenomenon are available because most cameras orbiting Mars are placed in orbits where they can only observe during the afternoon, whereas this cloud takes place in the early morning, when observational coverage is much lower.

They also state that they will outline their theories as to the cause of the cloud in a follow-up paper.

I can’t help wondering if it is related to other evidence that suggested past glacial activity on the western flanks of Arsia Mons. There are many pits surrounding this volcano, and many might contain residue ice. One wonders if, during the warm spring and summer months at dawn the arrival of the sun might cause this cloud to form, and then vanish as the day passes, just like the dew does on Earth.

That is my uneducated guess, and likely wrong. We shall have to wait for their theoretical paper for a more educated guess.

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Surprisingly low number of observation proposals from astronomers for Webb telescope

4:03 pm

In preparation for the launch of the James Webb Space Telescope in ’21, the Space Telescope Science Institute (STScI) that will operate it has begun accepting observation proposals from astronomers, and has apparently discovered that the number of proposals, dubbed the subscription rate, is surprisingly low.

The stats of the James Webb space telescope cycle 1 proposal round came in the other day. In summary: an over subscription rate of 1:4. A little less even.

There was immediate spin how the stats were a good thing. Enthusiasm from around the globe! So many investigators! But that does not change that the 1:4 oversubscription is a disappointment. If I were part of the project, this would and should worry me.

If they got exactly the right number of proposals to precisely use all of the telescope’s observation time, the subscription rate would be 1. An oversubscription rate of 1.4 seems good, but in truth it is tiny compared to Hubble and other space telescopes, and horrible considering the cost of Webb (almost $10 billion, 20x what it was originally budgeted).

The author at the link provides some technical reasons for the low interest, some of which are the fault of the Webb management team (such as a very complicated proposal process) and some that are beyond their control (the Wuhan panic). He also provides suggestions that might help.

Either way, the relatively low interest I think is rooted in Webb’s initial genesis. It was pushed by the cosmological community and its design thus optimized for studying the early universe. Other astronomical fields were pushed aside or given a lower priority so that the telescope does not serve them as well.

The result is that a lot of astronomers have been finding other more appropriate and already functioning telescopes to do their work, bypassing Webb entirely. They are probably also bypassing Webb because it seems foolish to spend the inordinate amount of time putting together a proposal for a telescope a decade behind schedule that carries an enormous risk of failure once it is launched.

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Witness announces his team has hacked Georgia election runoff polling machines

1:53 pm

During testimony today in Georgia investigating the possibility of election fraud on November 3rd, a witness announced that his team at that very moment had hacked into the voting machines being used for the Georgia senate runoff races and was communicating with the machines.

During a Senate hearing in Georgia over fraud in the 2020 presidential election, Jovan Pulitzer told the senate members, “At this very moment at a polling location in the county, not only do we now have access to the devices through the poll pad — the system — but we are in.”

Pulitzer told the senators this should not be able to happen, but his team was has able to hack into the voting system and has documented evidence to prove it. Pulitzer said the machines are connected to the internet and two-way communication is occurring in real-time. “It’s receiving data and sending data,” he said.

When questioned, Pulitzer said the polling place his team hacked into is a physical location, not a mobile station. Pulitzer said his team has access to the data from the Georgia Senate runoff race from the polling station.

The article provides a link to his testimony. This proves that the owners of Dominion have been lying when they say their machines are not connected to the internet. It also shows how easy it would be to falsify the results. As the witness noted, if you can download the data from the machines you can change it and then upload it again, and if no one suspected you were doing it (or was willfully blind to your tampering) no one would ever find out.

All election results in Georgia are thus suspect. If nothing is done, that I would be astonished if either Republican candidates won their run-offs.

In fact, I think this comedy movie clip provides a perfect description of our modern American culture:

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Air leak in Russian section of ISS continues

8:27 am

Dmitri Rogozon, the head of Roscosmos, yesterday announced that they will be sending to ISS special equipment for investigating a new air leak in the Russia section of ISS.

This apparently is not the 1-2 inch long crack in the Zvezda module that leaked previously and was found and sealed. Moreover, the article at the link admits that their astronauts found no sign of damage on the outside of Zvezda when they did a space walk in November, suggesting that this first leak was not caused by a micrometeorite hit.

All the known facts so far strongly suggest that the leaks are because of Zvezda’s 20-year-old age, and might be stress fractures caused by the three dozen or so dockings and undockings that have occurred there since its launch.

That the Russians are being so vague about the entire matter reinforces that conclusion. They have never released an image of the first leak, and provided no details about the equipment being sent to the station.

And if Zvezda is beginning to crack due to age, I am not sure what repairs they can do to stop it.

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Puerto Rican government commits $8 million to rebuild Arecibo

8:16 am

The government of Puerto Rico earlier this week announced that it has allocated $8 million to rebuild the Arecibo Observatory.

Via an executive order, Gov. Wanda Vazquez made reconstruction of the observatory public policy. In a ceremony at La Fortaleza, the seat of the island’s government, Vazquez said that the Puerto Rican government believes that the telescope’s collapse provides a great opportunity to redesign it, taking into account the lessons learned and recommendations from the scientific community so that it remains relevant for decades to come.

…Vazquez said that she and her administration want the scope to once again become a world class center and the $8 million being allocated for reconstruction includes funds to repair the environmental damage caused by the collapse, something that has already begun under the supervision of the National Science Foundation (NSF).

We shall see what happens. $8 million is not really enough to rebuild Arecibo. And the NSF has been trying to unload it from its budgetary responsibility for almost a decade. I would be shocked if that agency now suddenly decided to fund its reconstruction.

Only if Congress gets involved will this likely change, and that wouldn’t surprise me, considering how nonchalant our present Congress is about spending money that doesn’t exist.

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Summer at the Martian south pole

1:34 pm

Overview of the Martian south pole

Today we have two cool images, both giving us a tiny glimpse at what it is like in the middle of summer on the fringes of Mars’ south pole ice cap. Their location is indicated by the blue crosses on the overview map on the right.

To review, the south pole on Mars is, like its north pole, mostly made up of a permanent icecap of water. In the south, this icecap is mostly mixed with dust and debris in the area outlined in black and dubbed the layered deposits. On top of this is a smaller thick water ice cap, indicated by light blue, which is in turn topped by a thin cap of frozen carbon dioxide, or dry ice, indicated by white. During the winter the entire pole, down to 60 degrees latitude also gets covered by a temporary mantle of dry ice, that sublimates away each spring.

Now for our cool images!
» Read more

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The seas of Titan, deep and alien

11:29 am

Radar track through the estuaries of Titan's large sea, Kraken Mare

The uncertainty of science: In a new paper scientists have taken the radar data from the more than 120 fly-bys by Cassini of Titan to map out the estimated depths for several of Titan’s seas, using that data to also better constrain the make-up of those seas. From their abstract:

Our analysis reveals that the seafloor at the center of Moray Sinus—an estuary located at the northern end of Kraken Mare, is up to 85 m deep. The radar waves are absorbed to an extent such that the liquid composition is compatible with 70% methane, 16% nitrogen, and 14% ethane (assuming ideal mixing). The analysis of the altimetry data in the main body of Kraken Mare showed no evidence for signal returns from the sea floor, suggesting the liquid is either too deep or too absorptive for Cassini’s radio waves to penetrate. However, if the liquid in the main body of Kraken Mare is similar in composition to Moray Sinus, as one would expect, then its depth exceeds 100 m.

The image above, cropped and reduced to post here, is figure two from the paper. » Read more

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Arianespace uses Soyuz rocket to launch French military satellite from French Guiana

9:51 am

Arianespace today successfully launched a French military reconnaissance satellite from French Guiana using a Russian Soyuz rocket.

This is the last launch for Europe in 2020, their sixth total. It is also the last publicly scheduled launch for the year. My annual worldwide launch report will follow in a day or so.

The leaders in the 2020 launch race:

35 China
25 SpaceX
15 Russia
6 ULA
6 Rocket Lab
6 Europe (Arianespace)

The U.S.’s lead over China in the national rankings remains 40 to 35.

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Published results from Curiosity as it traversed Vera Rubin Ridge

9:34 am

The science results from American Mars rover Curiosity during its traverse of Vera Rubin Ridge at the base of Mount Sharp in Gale Crater have now been released to the public.

This link takes you to the overview paper, available online for free. The abstract notes the key finding, which confirms previously released research:

We conclude Vera Rubin ridge formed because groundwater recrystallized and hardened the rocks that now make up the ridge. Wind subsequently sculpted and eroded Mount Sharp, leaving the harder ridge rocks standing because they resisted erosion compared with surrounding rocks. The implication of these results is that liquid water was present at Mount Sharp for a very long time, not only when the crater held a lake but also much later, likely as groundwater.

The fundamental geological mystery of Mars remains. The evidence strongly says that liquid water must have existed for long periods on the surface of Mars. At the same time, other evidence strongly says that the climate and atmosphere of Mars has never been warm enough or thick enough to allow for liquid water on the planet’s surface.

So far, no global model proposed by any theorist that allows liquid water in the past on Mars has been accepted with any enthusiasm by the planetary community. While possible, the models carry too many assumptions and are based on what is presently far too limited data. We simply do not yet know enough about Mars and its past history to explain this conundrum.

The paper also outlines a number of models for allowing liquid water in the localized area of Gale Crater alone. As with the global models, none fits all the facts, or is entirely satisfactory for explaining the data.

Regardless, the results from Vera Rubin Ridge confirm once again that enough liquid water once did exist on Mars to have allowed it to be habitable for life, even if we have so far found no evidence of any past life.

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