Tag: engineering

Chang’e-5 lunar orbiter heading to Sun-Earth Lagrange point

8:56 am

The new colonial movement: Chinese engineers have decided to extend the mission of the Chang’e-5 lunar orbiter by shifting its orbit so that it is transferred to one of the five Sun-Earth Lagrange points.

Amateur radio operators first confirmed the Chang’e-5 orbiter was still in space and heading towards the moon. Official confirmation has now been provided as to the spacecraft’s status.

Hu Hao, a chief designer of the third (sample return) phase of the Chinese lunar exploration program, told China Central Television (Chinese) Dec. 20 that the orbiter is now on an extended mission to a Sun-Earth Lagrange point. Hu said the extended mission was made possible by the accurate orbital injection by the Long March 5 launch vehicle, the same rocket which failed in July 2017 and delayed Chang’e-5 by three years. The Chang’e-5 orbiter has more than 200 kilograms of propellant remaining for further maneuvers.

While unspecified, it is believed that the Chang’e-5 orbiter will enter orbit around L1, based on the reference to planned solar observations. The orbiter is equipped with optical imagers. The team will decide on a further destination after tests and observations have been conducted, Hu said.

It makes great sense to keep the orbiter operating, and since lunar orbits tend to be unstable, going to a Lagrange point makes even more sense.

However, this decision raises an interesting point for the future. There are only five Lagrange points in the Earth-Sun system. All have great value. All also can likely sustain a limited number of satellites and spacecraft. Who coordinates their operations? What happens if China fills each with its spacecraft? For example, the James Webb Space Telescope is aiming for Lagrange point #2, a million miles from Earth in the Earth’s shadow. While Chang’e-5 is presently heading to a different point, what happens if China changes its mind and puts Chang’e-5 in Webb’s way?

As far as I know, there has been no discussion of this issue in international circles.

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Russia recovers boosters dropped on Russia

8:42 am

The new colonial movement: Dmitri Rogozin, head of Russia’s Roscosmos space agency, announced this past weekend the recovery of the first stage and boosters from a December 18th Vostochny launch that, because of the polar orbit of the satellite, were dropped on Russian territory.

On Friday, a Soyuz 2.1b rocket launched from the Vostochny Cosmodrome, carrying its payload of 36 OneWeb satellites into space. Although Russia’s newest spaceport is located in the far eastern part of the country, it still lies several hundred kilometers from the Pacific Ocean.

This means that as Soyuz rockets climb into space from this location, they drop their stages onto the sparsely populated Yakutia region below. With the Soyuz rocket, there are four boosters that serve as the rocket’s “first stage,” and these drop away about two minutes after liftoff. Then, the “Blok A” second stage drops away later in the flight.

Although the Yakutia region is geographically rugged and sparsely populated, the Russian government does a reasonably good job of establishing drop zones for these stages and keeping them away from residential areas. This is what happened, as usual, with Friday’s launch. [emphasis mine]

The focus of the article at the link is the silly jabs at SpaceX that Rogozin included in his announcement. The real story, however, is that the Russian government, in deciding to build a new spaceport in Vostochny, made the conscious decision to place it where it would have to dump rockets on its own territory. They could have instead built this new spaceport on the Pacific coast, and avoided inland drop zones, but did not for reasons that escape me.

Tells us a lot about that government and what it thinks of its own people. But then, governments rarely care much about ordinary people, as those who revel in the power of government are generally more interested in that power than in doing what makes sense or is right.

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China completes first launch of Long March 8 rocket

8:28 am

The new colonial movement: China today successfully launched for the first time its new Long March 8 rocket, designed at some point to mimic the Falcon 9 by vertically landing its first stage and reusing it. (Note: link fixed!)

On this launch the rocket had no such recovery capability.

The leaders in the 2020 launch race:

34 China
25 SpaceX
15 Russia
6 ULA
6 Rocket Lab

The U.S. still leads China 40 to 34 in the national rankings.

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Update on Starship protype #9

10:25 am

Link here. The article not only provides video and the status of prototype #9 after its fall against the side of the assembly building, it also provides the status of the numerous other prototypes, both of Starship and Super Heavy.

In addition, the article shows the clean-up of the remains of Starship #8 from the landing pad.

All told, it appears that Starship #9 has been repaired from its fall, and is being prepped for a 50,000 foot flight sometime around New Year’s.

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Lockheed Martin buys Aerojet Rocketdyne for $4.4 billion

10:20 am

Capitalism in space: Lockheed Martin officials announced yesterday that it will buy the rocket engine company Aerojet Rocketdyne for $4.4 billion.

James Taiclet, Lockheed Martin’s president and CEO, said the acquisition gives the company a larger footprint in space and hypersonic technology. He said Aerojet Rocketdyne’s propulsion systems already are key components of Lockheed Martin’s supply chain across several business areas. “The proposed acquisition adds substantial expertise in propulsion to Lockheed Martin’s portfolio,” the company said in a news release.

Aerejet Rocketdyne has been in trouble because it has had problems finding customers for its engines. This acquisition will give Lockheed Martin more technical capabilities should it decide to enter the launch industry with its own rocket.

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Samples from space!

9:16 am

Scientists from both the Japanese Hayabusa-2 mission to the asteroid Ryugu and the Chinese Chang’e-5 mission to the Moon announced yesterday the total amount of material they successfully recovered.

The numbers appear to diminish the Japanese success, but that is a mistake. Getting anything back from a rubble-pile asteroid that had never been touched before and is much farther away from Earth than the Moon was a very great achievement. The 5.4 grams is also more than fifty times the minimum amount they had hoped for.

This is also not to diminish the Chinese achievement, They not only returned almost four pounds, some of that material also came from a core sample. They thus got material both from the surface and the interior of the Moon, no small feat from an unmanned robot craft.

Scientists from both nations will now begin studying their samples. Both have said that some samples will be made available to scientists from other countries, though in the case of China it will be tricky for any American scientist to partner with China in this research, since it is by federal law illegal for them to do so.

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Mysterious signal detected possibly coming from Proxima Centauri

9:05 am

The uncertainty of science: Breakthough Listen, the project funded to the tune of $100 million by billionaire Yuri Milner with the goal of listening for alien radio signals, in 2019 detected a single radio tone that appeared to be coming from the nearest star, Proxima Centauri.

A team had been using the Parkes radio telescope in Australia to study Proxima Centauri for signs of flares coming from the red dwarf star, in part to understand how such flares might affect Proxima’s planets. The system hosts at least two worlds. The first, dubbed Proxima b upon its discovery in 2016, is about 1.2 times the size of Earth and in an 11-day orbit. Proxima b resides in the star’s “habitable zone,” a hazily defined sector in which liquid water could exist upon a rocky planet’s surface—provided, that is, Proxima Centauri’s intense stellar flares have not sputtered away a world’s atmosphere. Another planet, the roughly seven-Earth-mass Proxima c, was discovered in 2019 in a frigid 5.2-year orbit.

Using Parkes, the astronomers had observed the star for 26 hours as part of their stellar-flare study, but, as is routine within the Breakthrough Listen project, they also flagged the resulting data for a later look to seek out any candidate SETI signals. The task fell to a young intern in Siemion’s SETI program at Berkeley, Shane Smith, who is also a teaching assistant at Hillsdale College in Michigan. Smith began sifting through the data in June of this year, but it was not until late October that he stumbled upon the curious narrowband emission, needle-sharp at 982.002 megahertz, hidden in plain view in the Proxima Centauri observations. From there, things happened fast—with good reason. “It’s the most exciting signal that we’ve found in the Breakthrough Listen project, because we haven’t had a signal jump through this many of our filters before,” says Sofia Sheikh from Penn State University, who helmed the subsequent analysis of the signal for Breakthrough Listen and is the lead author on an upcoming paper detailing that work, which will be published in early 2021. Soon, the team began calling the signal by a more formal name: BLC1, for “Breakthrough Listen Candidate 1.”

The data so far does not suggest this signal was produced by an alien technology. Instead, it likely is a spurious signal from some natural or human source, picked up by accident, as was the SETI “Wow” signal that for years puzzled astronomers until they traced it to a comet.

However, as they do not yet have an explanation, it is a mystery of some importance.

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SpaceX completes 25th orbital launch in 2020

8:45 am

Capitalism in space: SpaceX today successfully completed its 25th orbital launch in 2020, using its Falcon 9 rocket to put an American spy satellite into orbit.

The first stage successfully landed at Cape Canaveral, completing its fifth flight.

Not only is 25 launches in a single year a new record for SpaceX, it is also four more launches than the company predicted it would achieve in 2020.

This was also the 40th successful American orbital launch in 2020, the first time since 1968 that the U.S. has had that many launches. In 1968 the launches were almost all dictated by the government, on rockets controlled by the government. Today, the rockets are all privately designed and owned, with the small number of government launches occurring with the government merely the customer buying a product.

The leaders in the 2020 launch race:

33 China
25 SpaceX
15 Russia
6 ULA
6 Rocket Lab

The U.S. now leads China 40 to 33 in the national rankings. The rankings also should not change significantly in the last two weeks of the year, as the U.S. has no more scheduled launches and China and Russia only one.

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Subaru Telescope photographs Hayabusa-2’s next target asteroid

2:09 pm

In order to better constrain its orbit, the Subaru Telescope in Hawaii has obtained new photographs of Hayabusa-2’s next target asteroid, 100-foot-wide 1998 KY26.

This asteroid is predicted to approach to within 0.47 AU of Earth in mid to late December 2020, giving us a rare opportunity that comes only once every three and a half years. However, the diameter of 1998 KY26 is estimated to be no more than 30 meters, and thus its brightness is so dim that ground-based observations of the asteroid are difficult without a very large telescope.

The observations with the Subaru Telescope were conducted upon the request of the Institute for Space and Astronautical Science (ISAS), JAXA. And as a result, 1998 KY26 was photographed in the direction of the constellation Gemini as a 25.4-magnitude point of light with a measurement uncertainty of 0.7 mag. The positional data collected during these observations will be used to improve the accuracy of the orbital elements of the asteroid. Similar observations were conducted with the Very Large Telescope (VLT) of the European Southern Observatory (ESO).

If all goes right Hayabusa-2 will rendezvous with 1998 KY26 in the summer of 2031.

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NASA decides to fly Orion with failed power unit

1:59 pm

Because a repair would delay the first SLS launch for months if not a year, NASA has decided to fly Orion on that November ’21 mission with failed electronics power unit.

In a Dec. 17 statement, NASA said it had decided to “use as is” one of eight power and data units (PDU) on the Orion spacecraft, which provide communications between the spacecraft’s computers and other components. One of two redundant channels in one of two communications cards in that PDU is not working.

…NASA, in its statement about deciding not to replace the PDU, did not go into details about the repair options, but said that the risks of damaging the spacecraft during the PDU repair outweighed any loss of data should the unit completely malfunction.

Engineers, the agency stated, “determined that due to the limited accessibility to this particular box, the degree of intrusiveness to the overall spacecraft systems, and other factors, the risk of collateral damage outweighed the risk associated with the loss of one leg of redundancy in a highly redundant system.”

“NASA has confidence in the health of the overall power and data system, which has been through thousands of hours of powered operations and testing,” the agency added, noting that the PDU in question was still “fully functional.”

Let’s then assess Orion. The contract was issued to Lockheed Martin in 2006. In the fourteen years since Congress has spent about $17 billion on this manned capsule. In that time it has flown once, during a test flight that was intended to test its heat shield, even though when that flight happened NASA had already decided that it was not going to use the heat shield design it was testing.

Orion’s second flight in November ’21 will be unmanned, but it will be flying with this failed unit. The next time it is supposed to fly will be in ’24, when NASA is hoping to send astronauts on a lunar landing missions. By that time NASA will have spent about $20 billion on Orion, and gotten two test capsules (both unrepresentative of the flight model) plus one manned mission.

Would you fly on this capsule under these circumstances? I wouldn’t, especially considering the non-track record of its rocket, SLS.

As the taxpayer, do you think you’ve gotten your money’s worth from this capsule? I don’t. I think it has been an ungodly waste of money, and a demonstration of the incapability of NASA and the big space contractors Boeing and Lockheed Martin of getting anything accomplished. Depend on them, and you will never go anywhere.

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Terraced mesas in Martian crater

12:38 pm

Terraced mesa in Martian crater
Click for full resolution image.

The cool image to the right, reduced and annotated to post here, was a captioned photo released by the Mars Reconnaissance Orbiter (MRO) science team earlier this week. Taken by MRO’s high resolution camera, it shows in color a beautifully stair-stepped mesa located in an unnamed 22-mile-wide equatorial crater in Arabia Terra, the large transitional zone between the lowland northern plains and the southern cratered highlands. As the caption notes,

Several craters in Arabia Terra are filled with layered rock, often exposed in rounded mounds. The bright layers are roughly the same thickness, giving a stair-step appearance. The process that formed these sedimentary rocks is not yet well understood. They could have formed from sand or volcanic ash that was blown into the crater, or in water if the crater hosted a lake.

If volcanic ash, the layers are signalling a series of equal eruptions of equal duration, which seems unlikely. Water is also puzzling because of the equatorial location. Like yesterday’s mystery cool image, water is only likely here at a time when the red planet’s rotational tilt, its obliquity, was much higher, placing this at a higher latitude than it is today.

Regardless, make sure you look at the full image here. This crater floor is chock-full of more such terraced mesas, some of which are even more striking than the sample above.

I have also posted below the MRO context camera photo of the entire crater.
» Read more

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First flightworthy BE-4 engine delivery now expected in summer ’21

9:22 am

Capitalism in space: Tory Bruno, the CEO of ULA, revealed yesterday that Blue Origin will finally deliver two flightworthy BE-4 engines for ULA’s Vulcan rocket this coming summer.

ULA, the Pentagon’s top launch contractor for national security satellites, had initially expected the shipment in 2020 for a debut flight in early 2021, but this was delayed by development hurdles.

The installation of Blue Origin’s reusable BE-4 engines into ULA’s next-generation Vulcan rocket will keep it on track for the debut launch of a moon lander dubbed Peregrine at the end of 2021, ULA Chief Executive Tory Bruno said. The Vulcan rocket has won a slate of key U.S. defense missions through 2027.

“That is now our expectation, that Peregrine will go to space in the 4th quarter of 2021,” Bruno told reporters during a call on Thursday.

Peregrine is a commercial lunar lander being built by Astrobotic for NASA.

More information here.

It appears that ULA thinks the long delay in engine development and delivery from Blue Origin will not delay the planned first launch of Vulcan later in ’21. It appears their long range plan to recover and reuse these engines has caused them to design Vulcan so that they can easily swap out engines, which will allow them to complete that new rocket’s development with the test engines that Blue Origin has already provided, and then switch engines and launch within months.

During Bruno’s press briefing he also noted that they have done a thorough refurbish of the Delta launchpads and have instituted a new policy requiring regular launchpad dress rehearsals, in order to make sure the series of problems that delayed the launch of a Delta-4 Heavy earlier this year will not reoccur.

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ESA confirms cause of November Vega launch failure

9:09 am

The European Space Agengy (ESA) has now completed its full investigation of a Vega rocket launch failure in November, and confirmed that the initially announced cause of “human error” was correct.

Engineers had installed cables backwards causing the nozzle in the upper stage to go one way when it should have gone the other.

The press release at the link is a wonder of bureaucratic cover-your-behind gobbly-gook, saying much without providing any concrete information about the corrections imposed. For example, the upper stage structure is built by one company, Airbus, the engine is built by two Russian companies, Yuzhnoye and Yuzhmash, while a fourth company, Avio, supervises the stage’s assembly. The press release makes it a point to not tell us where the error was made by which company, though by vague implication it suggests the error occurred during final assembly by Avio.

If I was a satellite company thinking of buying a Vega launch I would demand a much more straight-forward explanation. Otherwise I’d go elsewhere.

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Russia successfully launches another group of OneWeb satellites

8:43 am

Russia today successfully launched the first group of OneWeb satellites since that company entered and left bankruptcy, and it did it for the first time from its new Vostochny spaceport.

The Soyuz rocket’s flight path (see the map at the link) also took it for the first time northward over Russia, where it dropped its boosters and stages. No word on whether any villages or homes were hit.

The 36 satellites launched raises OneWeb’s constellation to 110 satellites total.

The leaders in the 2020 launch race:

33 China
24 SpaceX
15 Russia
6 ULA
6 Rocket Lab

The U.S. continues to lead China 39 to 33 in the national rankings. A SpaceX launch, originally set for yesterday, has been delayed until tomorrow due to an tank pressure issue with its upper stage.

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A splat on Mars

2:23 pm

A splat on Mars
Click for full image.

Cool image time! The photo to the right, cropped to post here, was taken on October 31, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Labelled simply as a “Terrain Sample”, it was not taken as part of any specific science research but because the MRO science team need to regularly take pictures to maintain the camera’s temperature. When such engineering images are required they try to pick spots of some interest, but sometimes the resulting picture is somewhat bland.

If you look at the full image, you will see that blandness generally describes it. However, in the upper left corner was a most intriguing-looking crater, which I have focused on above. From all appearances, when this impact happened the ground was quite soft, almost like mud, and thus the ejecta splattered away not as individual rocks and debris but as a flow.

The map below gives a little context, but really doesn’t explain this crater fully.
» Read more

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Using origami to design spaceship fuel bladders

12:44 pm

Capitalism in space: Engineers at Washington State University have developed a new design for a collapsible fuel bladder for spaceships using as its basis the Japanese art of origami.

Washington State University researchers have used the ancient Japanese art of paper folding to possibly solve a key challenge for outer space travel – how to store and move fuel to rocket engines. The researchers have developed an origami-inspired, folded plastic fuel bladder that doesn’t crack at super cold temperatures and could someday be used to store and pump fuel.

The advantages of a fuel tank that will shrink as it empties are numerous. It appears that nothing that has been tried so far has worked as well as this new design. If proven viable, it will change radically how interplanetary spaceships are designed. It will also make interplanetary missions more practical.

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An update on the testing of SLS’s core stage

9:38 am

Link here. The article provides more information on the temperature issue that caused the seventh of eight fueling tests of the core stage to abort early.

The temperature issue arose when NASA transferred superchilled liquid oxygen, to fuel the rocket, from a holding facility to the core stage of the SLS. This procedure has been modeled and verified before, Julie Bassler, SLS stages manager at Marshall, told reporters during the same teleconference. But this was the first time the transfer actually took place.

“We were actually just a few degrees different than what we wanted to see coming in,” she continued, but said the temperature must be precise during the initial phases of filling the tank. The requirement is minus 290.57 degrees Fahrenheit (minus 179.21 degrees Celsius.) But the liquid oxygen was slightly cooler, at minus 296.67 degrees Fahrenheit (minus 182.59 degrees Celsius).

“We filled up [the tank] just enough to pass the phase where we knew we weren’t going to be able to get the temperature to a level that was going to be acceptable to meet the requirement, and that’s when they caught us … in the testing,” Bassler continued.

Despite this issue, NASA still hopes to do the last core stage test, dubbed the Green Run, in the last week in December. During that static fire test they will fuel the core stage entirely and then fire its engines for the full duration of an actual launch — almost ten minutes. If all goes well they will then pack up the stage and ship it to Florida for the planned November unmanned test mission sending Orion around the Moon.

They have no schedule margins, however, because all the components of this very expensive and complex rocket need a lot of time to get anything done. The two solid rocket boosters that will be attached to the sides of the core stage only have a twelve month lifespan once assembled, and they are holding off assembling them pending this test. The core stage itself needs two months to be disassembled, and then two months to be reassembled in Florida. And there remain the issue of a failed power unit in the Orion capsule that could take four to twelve months to repair.

The article however had this telling quote, based on comments from a NASA official, about future launch procedures, that sent a chill up my spine:
» Read more

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India successfully completes second launch in 2020

8:42 am

Using its PSLV rocket India today successfully placed a communications satellite into orbit.

This was only the second launch by India in 2020. At the start of the year ISRO had predicted they would complete as many as twelve launches. Instead, their panic over COVID-19 shut them down.

The leader board for the 2020 launch race presently stands unchanged, though a SpaceX rocket is on the launchpad and might lift-off in the next 90 minutes. [UPDATE: SpaceX has stood down and will try again tomorrow.]

33 China
24 SpaceX
14 Russia
6 ULA
6 Rocket Lab

The U.S. still leads China 39 to 33 in the national rankings.

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Chang’e-5 sample return capsule successfully recovered in China

6:18 pm

The new colonial movement: The sample return capsule for China’s Chang’e-5 mission, the first to bring lunar samples back to Earth since 1976, has been successfully recovered in the inner Mongolia region of China today.

Chinese officials confirmed the roughly 660-pound (300-kilogram) capsule landed at 12:59 p.m. EST (1759 GMT) Wednesday, or 1:59 a.m. Thursday in Beijing.

Recovery crews dispatched to the remote landing zone converged on the capsule in helicopters and off-road vehicles, traveling across the snow-covered plains of Inner Mongolia in the middle of the night. Ground teams reached the Chang’e 5 return module within minutes to begin operations to secure the capsule, and planted a Chinese flag in the frozen soil next the spacecraft.

Crews plan to transport the module to Beijing, where scientists will open the sample carrier and begin analyzing the moon rocks.

For China this success is a major milestone for its government-run space program. They have demonstrated superb technical capabilities that will serve them on many more future missions. They have also signaled to the world and the U.S. that they mean business in space, and that their published plans to build colonies on the Moon are serious. They have also made it clear that they will enforce control over any territory they occupy, notwithstanding the rules of the Outer Space Treaty. Any American government that makes light of these facts and refuses to aggressively compete with China is going to quickly discover it shut out of the most valuable locations on the Moon.

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InSight: Mars’ crust is thin, and its interior is many layered with a molten core

5:13 pm

Scientists yesterday released results from the seismometer on the Mars InSight lander that suggest that the crust of the red planet is thin and that its interior is many layered with a molten core.

[T]wo moderate quakes, at magnitude 3.7 and 3.3, have been treasure troves for the mission. Traced to Cerberus Fossae, deep fissures in the crust 1600 kilometers east of the landing site that were suspected of being seismically active, the quakes sent a one-two punch of compressive pressure (P) waves, followed by sidewinding shear (S) waves, barreling toward the lander. Some of the waves were confined to the crust; others reflected off the top of the mantle. Offsets in the travel times of the P and S waves hint at the thickness of the crust and suggest distinct layers within it, Brigitte Knapmeyer-Endrun, a seismologist at the University of Cologne, said in an AGU presentation. The top layer may reflect material ground up in the planet’s first billion years, a period of intense asteroid bombardment, says Steven Hauck, a planetary scientist at Case Western Reserve University.

At 20 or 37 kilometers thick, depending on whether the reflections accurately trace the top of the mantle, the martian crust appears to be thinner than Earth’s continental crust—a surprise. Researchers had thought that Mars, a smaller planet with less internal heat, would have built up a thicker crust, with heat escaping through limited conduction and bouts of volcanism. (Though Mars is volcanically dead today, giant volcanoes dot its surface.) A thin crust, however, might mean Mars was losing heat efficiently, recycling its early crust, rather than just building it up, perhaps through a rudimentary form of plate tectonics, Mojzsis says.

The thin crust provides a solid basis for explaining the large volcanoes and vast lava plains on the planet. Combined with the light gravity, magma would have found an easier path to the surface. Handed this knowledge, planetary geologists can now make a first stab at outlining more precisely the planet’s early volcanic history.

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SpinLaunch expands operations at Spaceport America in NM

5:06 pm

Capitalism in space: SpinLaunch, the private launch startup that proposes to fling payloads into orbit rather than launch them in a rocket, has announced that it will be expanding its operations at Spaceport America in New Mexico.

The company already built a $7 million, 10,000-square-foot facility at the Spaceport after announcing plans last year to conduct all testing there on its new technology. Now, the company is doubling down, with plans to hire an additional 59 people and invest another $46 million over 10 years. The state Economic Development Department will support the expansion with $4 million in Local Economic Development Act funding, said EDD Secretary Alicia J. Keyes.

…Under its expansion, the company plans to actually build the centrifuge launch system at the spaceport, with test launches to start next year. “We expect by next summer to begin flight test operations at the spaceport, and we expect to continue to test new flight designs there for the foreseeable future,” Yaney told the Journal. “We see it as a permanent facility for us.”

The idea is fascinating, but I have some doubts. First, the accelerations will be so high that it might limit the company’s customer base, since many satellites will likely not be able to withstand those forces.

If it works, however, the company will have found a truly clever way to eliminate entirely the need for a first stage, and maybe even the second stage.

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ESA funds ArianeGroup prototype vertical landing hopper

4:57 pm

The European Space Agency (ESA) has now committed 33 million euros for ArianeGroup to develop a prototype vertical landing hopper dubbed Themis that would begin testing first stage landings by ’23.

ArianeGroup and its collaborators in Belgium, Switzerland, France and Sweden offer critical technical knowhow gained through the development of Europe’s next-generation engine – Prometheus – which will power Themis.

ESA’s Prometheus is a highly versatile engine capable of providing 1000 kN of variable thrust and is reignitable which makes it suitable for core, booster and upper stage application. An onboard computer handles engine management and monitoring in real time – a crucial feature for reusability.

ArianeGroup is the private consortium led by Airbus and Safran that is building Ariane 6. This deal suggests that ESA amd ArianeGroup has finally recognized that Ariane 6, built without reusability, is a lemon and is not attracting customers. This new contract starts the process of developing a reusable first stage.

They still might be too late. They will only begin testing the Themis prototype in ’23, with no clarity on when a full scale version will follow. Meanwhile, it is very likely that SpaceX’s fully reusable Starship/Super Heavy will be flying orbital missions by then, and likely charging far less than they presently do for their Falcon 9.

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Cones on Mars!

9:35 am

Today’s cool image is actually a bunch, all found recently in the monthly image download from the high resolution camera on Mars Reconnaissance Orbiter (MRO).

All the photos I post below show pimple-like cones, all of which appear to be a type of small volcano. The cones are found in a wide range of locations, from the northern lowland plains to the cratered highlands to the mid-latitude transition zone between the two. They are also found at the bottom of deep canyons, in the floors of craters, and amidst mountains.

Let us begin.
» Read more

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Dark storm on Neptune changes direction unexpectedly

8:35 am

Dark storm on Neptune
Click for full image.

Using the Hubble Space Telescope, astronomers have found that a dark storm discovered on Neptune in 2018 has been drifting across the gas giant in unexpected ways.

The storm, which is wider than the Atlantic Ocean, was born in the planet’s northern hemisphere and discovered by Hubble in 2018. Observations a year later showed that it began drifting southward toward the equator, where such storms are expected to vanish from sight. To the surprise of observers, Hubble spotted the vortex change direction by August 2020, doubling back to the north. Though Hubble has tracked similar dark spots over the past 30 years, this unpredictable atmospheric behavior is something new to see.

Equally as puzzling, the storm was not alone. Hubble spotted another, smaller dark spot in January this year that temporarily appeared near its larger cousin. It might possibly have been a piece of the giant vortex that broke off, drifted away, and then disappeared in subsequent observations.

The photo to the right, cropped and reduced to post here, shows both storms. The smaller dark spot can be seen faintly to the right of the larger storm.

Since Hubble has been observing Neptune in 1993 it has seen four such storms, all of which have faded away after about two Earth years. What causes the storms as well as their motions in Neptune’s atmosphere remains unknown, and any theories posited (such as those noted at the link) are highly unreliable, considering the paucity of data we have about Neptune’s atmosphere and the meteorology of such gas giants.

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Scientists confirm ample Ryugu material in first Hayabuse sample chamber

8:01 am

Japanese scientists have opened the first chamber that stored the Ryugu asteroid samples obtained during its first touch-and-go sample grab, and confirmed that it holds ample material.

They also noted that the chamber itself contained gas from the asteroid as well.

The Japan Aerospace Exploration Agency (JAXA) has confirmed that the gas collected from the sample container inside the re-entry capsule of the asteroid explorer, Hayabusa2, is a gas sample originating from asteroid Ryugu.

The result of the mass spectrometry of the collected gas within the sample container performed at the QLF (Quick Look Facility) established at the Woomera Local Headquarters in Australia on December 7, 2020, suggested that the gas differed from the atmospheric composition of the Earth. For additional confirmation, a similar analysis was performed on December 10 – 11 at the Extraterrestrial Sample Curation Center on the JAXA Sagamihara Campus. This has led to the conclusion that the gas in the sample container is derived from asteroid Ryugu.

They think that this gas must have outgassed from the samples themselves. I suspect it was released either during the long journey or when the samples were subjected to the high accelerations and impact during its return to Earth. Research is going to have to try to pin this down, however.

They plan to open the two remaining sample chambers containing material sometime next week.

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Astra test launch almost reaches orbit

2:53 pm

The view from space on Astra's Rocket

UPDATE: The rocket came up slightly short of orbit. From Eric Berger:

Rocket was 0.5 km/s short of orbit. With a better fuel mixture in the upper stage it would have orbited. Apogee of 390km. Rocket 3.3 will carry a payload, and there will be no hardware or software changes.

Original post:
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Capitalism in space: According to the company’s Twitter feed, the second launch attempt today by Astra of its rocket appears to have reached orbit.

The images to the right were taken by their rocket, which is unimaginatively dubbed Rocket 3.2. I hope they now give this vehicle a more striking name.

If they have succeeded, they will have joined Rocket Lab as one of only two private commercial smallsat startups to launch a rocket to orbit. Two Chinese pseudo-private companies, Galactic Energy and ExSpace, have accomplished this, but I do not count them as real private companies. They might have worked independent of the government and raised investment capital, but nothing they do happens without close government supervision.

We will have to wait for full flight data from the company, but assuming they reached orbit that will be 40th American launch in 2020, the first time the U.S. has topped 40 launches in a single year since 1969, when the country achieved 46 successful orbital launches.

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Ancient and recent volcanoes on Mars

9:41 am

Volcanic vent on eastern flank of Olympus Mons
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on October 25, 2020. It shows what it calls a “possible volcanic vent east of Olympus Mons”.

Is this active? If not, how old is it. Also, the elongated shape of the vent suggests the possibility of a lava tube, or at least some underground complexity to the release of its magma.

In order to get some clarity, I emailed Sarah Sutton of the Lunar and Planetary Laboratory of the University of Arizona, who requested this photograph. Her response:

The image is of a small shield volcano with an elongated vent at the summit. We don’t have complete stereo here yet, so we can’t tell exactly what the height is. This vent might have sourced tube-fed flows, but in this case, we can’t resolve such features in the image data. This and other small shield volcanoes in the vicinity are partially buried by plains-forming lava flows. The lava flows around the base overlap the flows that emanate radially from the summit vent. Therefore we infer that the shield is older than the surrounding lava flows.

The vent, which runs from the southwest to the northeast, sits on top of a sloping wide hill, which is that small shield volcano described by Sutton. The flat plains surrounding this hill are from later eruptions from other and possibly larger volcanoes. The wider overview map below might give us a clue as to the source.
» Read more

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SpaceX in preliminary negotiations for another big fundraising round

9:07 am

Capitalism in space: According to this report, SpaceX is now in preliminary negotiations with investors prior to beginning another big fundraising round, even though the company just raised $1.9 billion in private investment capital in August.

The talks are still in early phases, and exact pricing for the fundraising round has not yet been determined, one of the people said. Terms could still change, and it could take several weeks to decide and firm up allocations, the person added. SpaceX also may not be able to convince investors to give it the lofty valuation it desires. Allocations refer to which investors will be authorized to buy shares and how much they will pay for those shares.

“It’s a pretty big shock to me, honestly,” one of the people said. “What company jumps to double its valuation in six months? I don’t care at what scale you’re operating, it’s kind of crazy,” they added. “If you look at the series, every single valuation is a 10 to 20% bump.”

It appears that the company is trying to leverage its successes with Dragon, Starship, and Starlink to obtain more funding. The story also suggests that SpaceX now has a better sense of what it will cost to get Starship built, and thus is looking to obtain those funds now, when they are in a good position to get them.

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Scientists confirm Hayabusa-2’s return capsule brought back material from Ryugu

8:56 am

Based on their first observations of the return capsule from Hayabusa-1, Japanese scientists yesterday confirmed that it successfully has returned material from the asteroid Ryugu.

JAXA said in a statement that they observed the sandy material at the entrance of the collection chamber, but have yet to look inside to see if more asteroid dust is lurking there. It is only the second time that scientists have returned material from an asteroid.

This find in the entrance portends a gold mine of material in the collection chamber itself.

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Rocket Lab successfully launches Japanese radar satellite

8:48 am

Capitalism in space: Rocket Lab early today successfully launched an Japanese radar satellite using its Electron rocket.

This was the company’s sixth successful launch in 2020, matching the count it had predicted at the start of the year it would reach. And this despite one launch failure. The rocket also sported a new and larger faring, giving Rocket Lab the ability to launch larger payloards or more satellites with each launch.

The leaders in the 2020 launch race:

33 China
24 SpaceX
14 Russia
6 ULA
6 Rocket Lab

The U.S. now leads China 39 to 33 in the national rankings.

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