Author: Robert Zimmerman

OneWeb signs deal with SpaceX to launch its remaining satellites, replacing Russia

9:07 am

Capitalism in space: Just 18 days after its contract with Arianespace was suspended because of Russia invasion of the Ukraine, OneWeb has now signed a deal with SpaceX to use its Falcon 9 rocket to launch the remaining 200+ satellites in its satellite constellation.

Few details about the agreement were released Monday morning. “Terms of the agreement with SpaceX are confidential,” OneWeb said in a statement.

OneWeb said the “first launch” with SpaceX is expected before the end of this year, suggesting the company anticipates multiple flights on SpaceX rockets.

It appears that launches could start before the end of this year

There are two big losers in this story. The obvious one is Russia, as it has lost OneWeb as a satellite customer. The second, less obvious, is Arianespace, as it appears it has also lost OneWeb as a customer. It will also have to refund OneWeb any payments the satellite company made for launches that have not occurred, even those that Arianespace had paid Russia for which Russia is refusing to refund.

Though no details have been released about the deal, I would not be surprised if OneWeb got a better price than what it was paying Arianespace. I also suspect that Elon Musk was willing to make this deal with OneWeb, the prime competitor to his Starlink satellite constellation, because he favors the Ukraine in this war.

Finally, this deal will not only make Russia look bad, it will make SpaceX look magnificent. Its PR value cannot be measured for the company.

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Rogozin: Lift sanctions by end of March or else!

10:13 am

Dmitry Rogozin, the head of Russia’s Roscosmos space corporation that runs all of that nations aerospace industry, yesterday demanded that Europe and the U.S. lift its sanctions against Russia by end of March or he would take further action against them.

“We will wait until the end of March. The lack of response or a negative response would be a basis for our decision,” he said, without specifying what kind of decision it would be.

According to the official, the space corporation was not going to yield to the sanctions.

One immediately asks, what happens at the end of March? Why time further space-related actions then?

Well, the only area in which Russia is still cooperating with the west in space is on ISS. At the end of March, Russia will bring home American astronaut Mark Vande Hei using its Soyuz capsule. This suggests that once Vande Hei comes home, Rogozin will announce that Russia will no longer fly any western astronauts to ISS on its rockets or capsules. He might also further announce actions that will accelerate the end of the ISS partnership, including laying out Russia’s schedule for adding modules to its half of ISS and then detaching it from the station.

If so, good. Such an action will bring clarity to the station’s remaining days, forcing NASA to make sure the station can function after the Russian half is gone. It will probably quicken the development of Axiom’s modules to the station, and might encourage the private construction of other modules to pick up the slack left by the Russian exit.

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SpaceX launches another 53 Starlink satellites

9:53 pm

Capitalism in space: SpaceX tonight successfully used its Falcon 9 rocket to launch another 53 Starlink satellites into orbit.

The first stage completed its 12th flight, a new record. The fairings were also reused, one half for the fourth time and the other for the second time. SpaceX continues to maintain a one launch per week schedule in 2022.

At posting the upper stage still had one more engine burn to insert itself into the final orbit, followed by satellite deployment.

The leaders in the 2022 launch race:

11 SpaceX
6 China
3 Russia
2 ULA

The U.S. now leads China 17 to 6 in the national rankings.

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Today’s blacklisted American: Man who found Hunter Biden’s laptop harassed, threatened, and driven to bankruptcy

12:24 pm

Today's modern witch hunt
A witch hunt: The mainstream media’s modern approach to discourse.

Persecution is now cool! The computer repair shop owner who found and made public Hunter Biden’s laptop prior to the election has found himself harassed, threatened, and even driven to bankruptcy because of that entirely legal act.

The Delaware computer repair shop owner who alerted the FBI to Hunter Biden’s infamous laptop before ultimately taking it to Rudy Giuliani says he’s faced harassment from Big Tech, the IRS and other government agencies ever since, and now faces bankruptcy.

“I was getting a lot of death threats,” John Paul Mac Isaac said. “I had to have a Wilmington trooper parked in front of my shop all the time.

“There were multiple situations where people came in and you could tell they were not there to have a computer fixed. And if there were not other people in the shop, I don’t know what would have happened,” he told The Post. “I was having vegetables, eggs, dog s–t thrown at the shop every morning.”

The threats and violence got so severe in November 2020 that Isaac had to shutter his shop and flee Delaware and live in hiding for more than a year. When he later tried to file for unemployment Delaware bureaucrats kept closing his case without resolution so that he received no checks and had use some of the money in his 401K to pay his bills. The Delaware unemployment department only finally acted after he sent a letter to the state’s governor.
» Read more

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The journey so far of China’s Zhurong Mars rover

11:07 am

Zhurong's journey on Mars, as seen by MRO
Click for full image.

Elevation map and wider overview
Click for full image.

Cool image time! The science team for the high resolution camera on Mars Reconnaissance Orbiter (MRO) today released a new orbital photo that shows the entire journey on Mars of China’s Zhurong rover, since it landed in May 2021. That image, reduced to post here, is to the right. From the caption, written by Alfred McEwen of the Lunar & Planetary Laboratory in Arizona:

This HiRISE image, acquired on 11 March 2022, shows how far the rover has traveled in the 10 months since it landed.

In fact, its exact path can be traced from the wheel tracks left on the surface. It has traveled south for roughly 1.5 kilometers (about 1 mile). This cutout highlights the rover and the rover’s path (with contrast enhanced to better reveal the tracks).

The white curves that the rover has apparently been inspecting as it moved south are called megaripples, mid-size sand dunes from three to six feet in height that are generally found to be inactive, though not always. From a recent report about Zhurong’s findings:

“The examples Zhurong has visited appear very bright-toned in satellite images taken from orbit, and the team thinks that this is because the megaripples are covered with a layer of very fine dust,” says Matt Balme at the Open University, UK, who wasn’t involved in the analysis. “This means these features are probably currently inactive, as any present-day windblown sand would tend to remove the dust.”

That report used data from the rover’s first sixty days on Mars, after it had passed its first megaripple and had just reached the parachute and backshell. It does not include any later data in the past eight months, as Zhurong rolled past another nine megaripples and several small craters.

It also doesn’t include any data obtained as the rover skirted the wide apron that surrounds the large depression in the lower left. That depression looks like a crater at first glance, but because it appears to be on top of a mound it could instead by an old pitted cone. There are a lot of these cones in this region of the northern lowland plains of Mars, and planetary scientists really want to know whether they were formed from erupting ice, lava, or mud.

The Chinese have so far not released any data on what they have found in these later travels. We shall have to wait for further published papers.

The wider elevation overview map to the right, first published on August 24, 2021 and cropped and annotated to post here, shows Zhurong’s future potential geological targets to the south. The cone to the southwest as well as the nearest scarp to the south are probably the rover’s primary goals.

Though the released results have hinted that the geology here was shaped by both wind and water, direct evidence for water has not been found, or revealed by the Chinese. Zhurong has a radar sensor that could detect evidence of near surface underground ice, if it was there. As far as I know at this point, no results from that instrument have as yet been published.

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ESA makes official the split with Russia

9:32 am

At a press conference yesterday officials from the European Space Agency (ESA) officially announced that the partnership with Russia to launch its Franklin rover to Mars has ended, and the launch will not happen in ’22.

The program is not cancelled, but “suspended.” ESA is looking for alternatives to get its Rosalind Franklin rover to the Red Planet. Earth and Mars are correctly aligned for launches only every 26 months, so the next opportunities are in 2024, 2026, and 2028. Aschbacher said it is not feasible to be ready by 2024, so it will be one of the later dates.

Since Russia had been providing both the launch rocket and Mars lander, ESA cannot simply find a different rocket. It needs to come up with its own lander, or find someone else to build it. For example, one of many new private American companies building lunar landers for NASA might be able do it, though ESA would likely prefer a European company. If it did decide to go with an American company, it would certainly not hire one until it succeeds in completing successfully at least one planetary landing.

The officials also outlined ESA’s need to find new launch rockets for many other missions it had planned to launch on Russia’s Soyuz-2 rocket. That need will also be an opportunity for American rocket companies, but more significantly it could be a blessing for Arianespace’s Ariane 6 rocket. The Ariane 6 has struggled to find customers because of its high cost. The loss of Russia as a launch option will likely drive some ESA business to it.

Roscosmos’ head Dmitry Rogozin in turn announced that it will go ahead with its own Mars mission, using the lander on an Angara rocket

“True, we will lose several years, but we will replicate our landing module, make an Angara rocket for it and carry out this research mission from the newly-built Vostochny spaceport on our own. Without inviting any ‘European friends’, who prefer to keep their tails between their legs the moment they hear their American master’s angry voice,” Rogozin said on his Telegram channel.

Whether Russia will actually do this is questionable. For the last two decades Roscosmos has promised all kinds of numerous planetary missions and new rockets and new manned capsules, none of which has ever seen the light of day. To make such a thing happen now seems even more doubtful.

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Elon Musk targets 2029 for first Starship manned mission to Mars

9:16 am

Capitalism in space: In a tweet today Elon Musk announced 2029 as his present target date for the first Starship manned mission to Mars.

This target date should not be considered firm, though it must be taken seriously. Musk’s past predictions tended to be optimistic, but also not unrealistic. If Starship development proceeds at the pace SpaceX is presently maintaining, this date is wholly doable.

The article at the link also said that the first Starship orbital test flight “is expected to take place within the next month.” That certainly matches with Musk’s previous statements, but ignores the bureaucratic delays from the FAA that at the moment prevent it from happening.

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Russia launches three Russians to ISS on Soyuz-2 rocket

9:08 am

Russia today successfully launched three astronauts to ISS on its Soyuz-2 rocket, the first time the crew on a Russian launch to ISS was entirely Russian.

The docking at the station is expected three hours after launch.

The reason for the all-Russian crew has nothing to do with the Ukraine War. Initially NASA and Roscosmos were negotiating to have an American on this flight as part of a barter deal, whereby astronauts from the two space agencies fly on each other’s capsules in an even trade to gain experience with each. In October both agencies agreed to hold off the first barter flight until ’22. With the on-going sanctions however it is now unknown whether that barter deal will go forward.

The leaders in the 2022 launch race:

10 SpaceX
6 China
3 Russia
2 ULA

The U.S. still leads China 16 to 6 in the national rankings, with SpaceX having a scheduled Starlink launch this evening.

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Sierra Space signs Mitsubishi as partner in private Orbital Reef space station project

8:57 am

Capitalism in space: Sierra Space has now partnered with Japan’s Mitsubishi for developing technology to be used on the private commercial Orbital Reef space station project.

The companies did not elaborate on the technologies they will consider for Orbital Reef under the agreement. MHI does have extensive experience in International Space Station operations as the manufacturer of the Kibo laboratory module, which was installed on the station in 2008. The company also built the HTV cargo spacecraft and H-2 launch vehicle that launched those spacecraft to the station.

…Sierra Space’s role in Orbital Reef includes providing inflatable modules called the Large Integrated Flexible Environment (LIFE) Habitat. The company’s Dream Chaser vehicle under development will transport cargo and crew to and from the station.

A consortium led by Blue Origin announced Orbital Reef last October. In addition to Blue Origin and Sierra Space, Boeing will provide a science module, CST-100 Starliner commercial crew vehicle and support for station operations, while Redwire Space will handle microgravity research and manufacturing, payload operations and deployable structures.

This deal suggests that the project wants more experience in its stable. Also, by partnering with Mitsubishi, it likely garners political support in Japan.

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Orbit Fab wins contract to outfit U.S. military satellites for refueling

8:48 am

Capitalism in space: Orbit Fab has won a $12 million contract to outfit U.S. military satellites with its refueling port.

The funding includes $6 million from the U.S. Air Force and U.S. Space Force, and $6 million from Orbit Fab’s private investors. The contract is for the integration of Orbit Fab’s fueling port, called RAFTI — short for rapidly attachable fluid transfer interface — with military satellites. The port allows satellites to receive propellant from Orbit Fab’s tankers in space.

At present there are no refueling missions scheduled, simply because the satellites that could be refueled are not yet in orbit. Orbit Fab and the military however are discussing an in-orbit demo mission.

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SLS arrives at launch site

8:43 am

NASA’s SLS rocket finally arrived at its launch site early this morning after an 11 hour journey on its mobile launcher from the Vehicle Assembly Building (VAB), in preparation for a dress rehearsal countdown on April 3, 2022.

The approximately two-day test will demonstrate the team’s ability to load cryogenic, or super-cold, propellants into the rocket, conduct a launch countdown, and practice safely removing propellants at the launch pad. After wet dress rehearsal, engineers will roll the rocket and spacecraft back to the Vehicle Assembly Building for final checkouts before launch.

The launch is presently scheduled for late May, but we must not be surprised if it is delayed to June, or July.

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Update on the actual state of the Ukraine War

3:31 pm

Much of the reporting about the war in the Ukraine has been either based on individual anecdotal events, or propaganda being churned out by both sides in an effort to influence events and public opinion to their cause.

All of this information is generally useless in determining what is really happening.

A better way to understand the actual state of the war, who is winning and who is not, is to find sources that don’t look at individual events, but try to compile all the reliable and confirmed stories into an overall whole.

One source that does this routinely and with great success is the Institute for the Study of War. I have relied on their maps and reports for a clear understanding of the various Middle Eastern conflicts now for years. One week ago I posted a link to the Institute’s March 9, 2022 update on the Ukraine War, because I believed it provided the best review, well documented and sourced, covering Russia’s entire military operation in the Ukraine, as well as the effort of the Ukraine to fight back. At that time, the known data strongly suggested that though Russia appeared to be very slowly capturing territory, it was also meeting heavy resistance everywhere. Furthermore, Russia’s effort was hampered by a lagging logistics and supply operation. All told, this data suggested that Russia’s take-over of the Ukraine was going to take a lot longer than expected by Putin and his generals, and might even get bogged down into a long quagmire similar to what the Soviet Union experienced in Afghanistan in the late 1970s.

A week has passed, and the Institute has issued several updates since. By comparing today’s March 17th update with last week’s we can quickly get a sense of what has happened in that week.
» Read more

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Pushback: Pilots sue CDC over Biden mask requirement on planes

12:02 pm

How the CDC determines its mask policies
How the CDC determines its mask policies

Don’t comply: Ten pilots from three different American airlines — American, Southwest, and JetBlue — have now sued the CDC over the Biden administrations mask mandate requiring everyone to wear masks on airplanes.

A group of commercial airline pilots filed a lawsuit against the Centers for Disease Control and Prevention (CDC) in an attempt to lift the federal transportation mask mandate.

In court paperwork, the 10 commercial airline pilots – who work for American JetBlue and Southwest – argued that the CDC issued an order “Requirement for Persons to Wear Masks While on Conveyances & at Transportation Hubs” on Feb. 1, 2020 “without providing public notice or soliciting comment.”

The pilots are asking the court to “vacate worldwide the FTMM (federal transportation mask mandate)” calling the move an “illegal and unconstitutional exercise of executive authority.”

Biden’s edict was first imposed on February 1, 2021, shortly after he took power. It has been extended several times since, the most recent extension keeping it in force through April 18, 2022. At no time, however, has any data been put forth by the CDC demonstrating that the required masks accomplish anything, while we already have decades of data showing that the masks are useless against viruses like the Wuhan flu.

This new lawsuit is the eighteenth filed against the mandate, though it is the first filed by those who work on the planes.

The pilots claim above that the CDC did not follow federal law when it imposed the mandate is almost certainly correct. » Read more

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The world’s two biggest rockets move to their launchpads!

10:02 am

The real cost of SLS and Orion
The expected real per launch cost of SLS and Orion

The big news in the mainstream press today is the planned rollout from the Vehicle Assembly Building (VAB) of NASA’s SLS rocket this evening in preparation for its dress rehearsal fueling and countdown planned for April 3rd.

This article by Newsweek is very typical. It glows with facts lauding SLS’s gigantic size and the monumental systems designed to slowly transport it the four miles from the VAB to the launchsite.

At a height of 322 feet (ft), making it taller than the 305ft Statue of Liberty, the SLS will be the largest rocket to move to a launchpad since the Saturn V launched on its last mission in 1973, when it carried the Skylab space station into orbit around Earth. Its size has seen NASA dub it a Mega-Moon rocket.

NASA says that the four-mile journey from the Vehicle Assembly Building to the launch pad at NASA’s Kennedy Space Center in Florida, where the SLS was recently adorned with the NASA logo, will take between 6 and 12 hours. It will be carried on the back of NASA’s 6.6-million-pound crawler vehicle. [emphasis mine]

If that April 3rd countdown dress rehearsal goes well, SLS will be rolled back to the VAB and then prepped for its first launch, presently scheduled tentatively for May ’22, though more likely in June or July.

For NASA the rollout today is somewhat of a relief. SLS was originally supposed to launch in 2015, making it seven years behind schedule. It has also been enormously expensive, costing close to $30 billion to build, if one does not count the $20 billion cost of the Orion capsule it carries. That the agency finally has this rocket assembled and almost ready to launch, after so many delays and cost overruns, means that NASA might finally be able to prove it is a reality, not simply a boondoggle designed by Congress to funnel cash through NASA to their constituents.

The Newsweek article however strangely ignores the launchpad stacking of another equally gigantic rocket that occurred yesterday. » Read more

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NASA adds another antenna to its Deep Space Network

9:04 am

In its on-going project to upgrade and refurbish the antenna dishes of its Deep Space Network communications, used to communicate with planetary probes beyond Earth orbit, NASA yesterday announced that the fourth of six planned new antennas is now online in Madrid.

DSS-53 is the fourth of six antennas being added to expand the DSN’s capacity and meet the needs of a growing number of spacecraft. When the project is complete, each of the network’s three ground stations around the globe will have four beam waveguide antennas. The Madrid Deep Space Communications Complex is the first to have completed its build-out as part of project. Construction on DSS-53 began in 2016.

The Deep Space Network has needed an upgrade for about a decade, and has been especially under strain as the number of missions to Mars increased during that time. After many years of delay, almost all due to budget decisions by both NASA and Congress, the upgrade began in earnest in 2016.

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China launches military reconnaissance satellite

8:48 am

China today successfully launched its second Yaogon military reconnaissance satellite, using its Long March 4C rocket.

The leaders in the 2022 launch race:

10 SpaceX
6 China
2 ULA
2 Russia

The U.S. lead over China in the national rankings is now 16 to 6. Note too that tomorrow Russia is scheduled to launch another crew to ISS, using its Soyuz-2 rocket, while SpaceX plans another Starlink launch.

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Rob Paravonian – Pachelbel Rant

6:01 pm

An evening pause: Pachelbel’s Canon in D is one of the most beautiful short pieces of music ever written, which of course is why it has been an evening pause a half dozen times before. I’ve posted a version of musicians jamming it at 3 am when they have nothing better to do, singing it a capella in a stairway, spectacularly on a guitar, as heavy metal, by a chicken (you have to watch it to understand), and played as a tango, bluegrass, gypsy, and practically any musical style you can imagine.

The rant below gives us the perspective of someone who has played the piece, and it is a perspective that might surprise you. After watching it enjoy all the other versions above, but above all make sure you watch the last one. You will then understand best what the cello player is thinking.

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Alignment of segments in Webb’s primary mirror completed

3:06 pm

Alignment image
Click for full image.

Astronomers and engineers have now successfully completed the alignment of the eighteen segments in the primary mirror of the James Webb Space Telescope.

On March 11, the Webb team completed the stage of alignment known as “fine phasing.” At this key stage in the commissioning of Webb’s Optical Telescope Element, every optical parameter that has been checked and tested is performing at, or above, expectations. The team also found no critical issues and no measurable contamination or blockages to Webb’s optical path. The observatory is able to successfully gather light from distant objects and deliver it to its instruments without issue.

The picture to the right shows that alignment, focused on a single star. As noted in the caption:

While the purpose of this image was to focus on the bright star at the center for alignment evaluation, Webb’s optics and NIRCam are so sensitive that the galaxies and stars seen in the background show up.

After many years delay and an ungodly budget overrun, thank goodness Webb appears to be working better than expected.

It will still be several months before actual science observations begin. Further more precise alignment adjustments need to be done for all its instruments and mirrors.

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Solar scientist Eugene Parker passes away at 94

2:53 pm

R.I.P. Solar scientist Eugene Parker, whose research revolutionized solar science in the 20th century and for which the Parker Solar Probe was named, has passed away at the age 94.

As a young professor at the University of Chicago in the mid-1950s, Parker developed a mathematical theory that predicted the solar wind, the constant outflow of solar material from the Sun. Throughout his career, Parker revolutionized the field time and again, advancing ideas that addressed the fundamental questions about the workings of our Sun and stars throughout the universe.

Parker belonged to the past generations of scientists who followed the principles of the Enlightenment and believed that science was fundamentally the search for truth. He understood he could always be wrong, which brought a certain muscular strength to any ideas he proposed. He could not be lazy in any way, or his work would fail. Instead, it shone, and made what little we know of the Sun today possible.

Sadly, such men are one-by-one going from us. I wonder if the new generations will understand his mindset.

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Pushback: Professor sues University of Illinois officials for suspending him for doing his job

12:56 pm

University of Illinois: run by clowns
University of Illinois: run by clowns

Jason Kilborn, a tenured law professor at the University of Illinois who had been suspended and forced to undergo sensitivity training because several unnamed students objected to an exam question that referenced racial slurs and that Kilborn had been using in his tests for a decade, has now sued a number of officials at the university.

University of Illinois Chicago law Professor Jason Kilborn’s recently filed lawsuit accuses administrators of violating his Constitutional rights, as well as defamation, false light and intentional infliction of emotional distress. It seeks damages in excess of $100,000.

Kilborn has been described by students as “top notch.” As his lawsuit against the University of Illinois Chicago moves forward, Kilborn maintains campus leaders engaged in performative retribution against him.

The lawsuit can be read here.

The named officials in the lawsuit are Michael Amiridis, the university’s chancellor, Caryn A. Bills, its associate chancellor, Julie M. Spanbauer, the law schools dean, Donald Kamm, the director of the school’s Office for Access and Equity, and Ashley Davidson, the school’s Title Ix & Equity Compliance Specialist.

I had described Kilborn’s blacklisting back in November 2021, describing in detail how Kilborn’s exam question had been in use for ten years with no objection, and was designed to help his law students uncover facts that would help lawyers defend minorities against racial abuse. I also noted that:
» Read more

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Recent avalanche on Mars

12:06 pm

Close-up comparison of slump
Click for full image.

Wide view comparison of slump
For full images go here and here.

Cool image time! Today the science team for the high resolution camera on Mars Reconnaissance Orbiter (MRO) released images showing a very recent avalanche, or slumping, on the interior slopes of what looks like a small three-mile-wide crater inside the easternmost reaches of the giant canyon Valles Marineris.

The comparison above, reduced and rotated to post here, is their close-up showing the change, which occurred sometime between March 2021 and February 2022. The wider comparison on the right, cropped, reduced, and annotated by me, shows a wider view to help place this slumping in the context of the crater.

Calling this an avalanche is not really accurate, as it isn’t really the fall of boulders and rocks, but the quick slumping downward of an entire section of what looks like dust or sand. As Alfred McEwen of the Lunar & Planetary Laboratory in Arizona writes in the caption:
» Read more

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Overview of the impact Russia’s invasion is having on the Ukraine’s space industry

9:57 am

Link here. The summary focuses on the major aerospace regions in the Ukraine, Dnipro and Kharkiv, outlining how they have so far been untargeted by the Russian invasion.

“In Dnipro, Yuzhmash and Yuzhnoye have not been bombed or targeted by missile attacks so far. One of the possible reasons is that Russia’s plan is to take them over as part of their invasion, so they intend to keep these facilities intact,” Usov said. “Because of the Russian attacks in the Dnipro region, these facilities are not operating at full capacities, and they were forced to halt work on their projects. But a share of their employees ensures their operations continue.”

The situation is the same in Kharkiv. No aerospace facilities have been directly targeted, but the war has shut down some operations, while others — especially those partnering with western nations or companies — have gone almost entirely virtual.

The article also describes a Ukrainian startup, Orbit Boy, that is trying to develop an air-launched smallsat rocket in partnership with companies in Poland and Italy. The war is making this development difficult, if not impossible.

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China tests rocket engine for the next Long March 5B launches

9:44 am

China’s state-run press today revealed that a full duration test has been successfully completed of the rocket engine that will be used by the core first stage of the Long March 5B rocket that will launch the next two modules for China’s Tiangong space station.

Developed by the China Aerospace Science and Technology Corporation, the engine is designed for the core stage of the Long March-5 carrier rocket series, which will be used to launch two lab modules of China’s orbiting Tiangong space station this year.

The long-range test, lasting 520 seconds, has verified the reliability of the engine, and there will be more than 20 experimental tasks that the rocket engine will undergo to further test its performance, the company disclosed.

Though this short press release does not say, it implies that this new engine is restartable, something that on previous launches of the Long March 5B was not possible for the core stage. This lack meant that once the core stage lifted and deployed its payload into orbit, it no longer had an engine that could control it. It would within weeks crash to Earth, threatening many habitable areas around the globe. This lack also resulted in a lot of very bad press for China.

If this new engine is restartable, it means that China will be able to de-orbit it in a controlled manner, over the ocean. If so, hallelujah! It means China will finally be honoring its obligations under the Outer Space Treaty.

If not, than China will continue to prove that it is an unreliable and dangerous player on the world stage.

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NASA extends Ingenuity’s mission through September ’22

9:31 am

Overview map
Click for interactive map.

NASA yesterday officially extended Ingenuity’s flight operations on Mars at least through September 2022, outlining in detail the helicopter’s hoped-for flight targets.

The map to the right shows the helicopter’s present location with the green dot, with its two possible future routes proceeding from this location indicated by dashed lines. The red dot indicates Perseverance’s present location, with its planned route from this spot indicated by the dashed lines.

Scheduled for no earlier than March 19, Ingenuity’s next flight will be a complex journey, about 1,150 feet (350 meters) in length, that includes a sharp bend in its course to avoid a large hill. After that, the team will determine whether two or three more flights will be required to complete the crossing of northwest Séítah.

Once Ingenuity crosses the rough terrain and reaches the delta, it will then be used to do more route scouting for the rover.

Upon reaching the delta, Ingenuity’s first orders will be to help determine which of two dry river channels Perseverance should take when it’s time to climb to the top of the delta. Along with routing assistance, data provided by the helicopter will help the Perseverance team assess potential science targets. Ingenuity may even be called upon to image geologic features too far afield (or outside of the rover’s traversable zone), or perhaps scout landing zones and caching sites for the Mars Sample Return program.

This ambitious plan exists because both the helicopter and its engineering team have far exceeded expectations. At the moment, there is no obvious reason why Ingenuity cannot continue to operate for years, an expectation that no one predicted.

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Launching a rocket using atomic explosions?

2:12 pm

Glenn Reynolds and Leigh Outten have just co-written a short paper advocating the use of “pulsed nuclear space propulsion” to launch rockets. You can download it here.

The concept, as first described in the 1950s, is described in the paper as follows:

It is not a tremendous surprise that when you set off an atomic bomb next to something, that something will move. That it could also remain essentially intact, however, was considerably more surprising. The challenge for the Orion team was to produce a spacecraft that could function after being subjected to not one, but many, nearby nuclear detonations, and that could be steered and navigated by an onboard crew.

This turned out to be easier than it sounds. The Orion spacecraft design that resulted involved a large steel “pusher” plate, behind a rather large spacecraft with a total weight of over 4,000 tons. That sort of design is very different from the spaceships we’re used to today.

The bulk of their paper reviews the legal obstacles to launching such rockets, as both the Outer Space Treaty and the Limited Test Ban Treaty put limits on the use of nuclear weapons in space. The paper argues that these limits would not apply to rockets propelled by atomic explosions, since the explosions would not be used as weapons.

The paper also argues that the technical obstacles for building such rockets are also solvable, and might even be easy to solve. This particular quote stood out starkly to me:
» Read more

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