Tag: engineering

Perseverance moves west, into the barren hinterlands beyond Jezero Crater

1:56 pm

Perseverance looking west
Click for full resolution. Original images can be found here and here.

Overview map
Click for interactive map.

Cool image time! The panorama above was created using two pictures taken on December 4, 2025 (here and here) by the navigation camera on the Mars rover Perseverance. The view I think is looking west, away from the rim of Jezero Crater, which now lies behind the rover to the east.

The blue dot on the overview map to the right marks Perseverance’s position when it took this picture. The yellow lines indicate my rough guess as to the area covered by the panorama. The white dotted line marks the actual route the rover has taken, while the red dotted line the original planned route.

As I noted in my previous Perseverance update in mid-November, the science team has apparently decided to revise the route, abandoning initial plan of going back uphill towards the rim and instead travel downhill into the hills beyond. This is a region that orbital data has suggested might be rich in minerals, making it a prime mining location for future colonists. My guess is that the science team decided they needed to get there, that they had enough data from the rim and that it was now more important to get to the western mineralogy.

Though I am sure they are using the highest resolution orbital images from Mars Reconnaissance Orbiter (MRO) to guide them, the Perseverance team has not yet upgraded its interactive location map to show those details in this western region. Thus, the map in this area is fuzzy and not as detailed.

The team has also not published its revised planned route, so there is no way to guess where the rover will go next. It does appear however that it is finally leaving Jezero Crater for good.

And as all recent pictures from Perseverance, these images show this Martian landscape to be utterly barren, its hills and valleys softened by dust and eons of erosion from the very thin Martian wind. This is an alien place, though it has the potential with human ingenuity to bloom if we have the courage to try.

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New data strengthens the conflict in the observed value for the universe’s expansion rate

11:49 am

Graphic showing the conflict
Click for original.

The uncertainty of science: New research using a combination of ground- and space-based telescopes has not only failed to resolve the difference between the two values observed for the Hubble constant (the expansion rate of the universe), it actually confirms that conflict.

The graphic to the right nicely illustrates the conflict. Observations from the early universe come up with a value of 67-68 kiloparsecs per second per megaparsec for the Hubble constant. Observations from the present universe, including these new more precise measurements, come up with a value of 73-74. From the press release:

A team of astronomers using a variety of ground and space-based telescopes including the W. M. Keck Observatory on Maunakea, Hawaiʻi Island, have made one of the most precise independent measurements yet of how fast the universe is expanding, further deepening the divide on one of the biggest mysteries in modern cosmology.

Using data gathered from Keck Observatory’s Cosmic Web Imager (KCWI) as well as NASA’s James Webb Space Telescope (JWST), the Hubble Space Telescope (HST) the Very Large Telescope (VLT), and European Organisation for Astronomical Research in the Southern Hemisphere (ESO) researchers have independently confirmed that the universe’s current rate of expansion, known as the Hubble constant (H₀), does not match values predicted from measurements from the universe when it was much younger.

Cosmologists call this conflict “the Hubble Tension”, a absurd fake term expressly designed to hide the fact that they have no idea what’s going on. It isn’t “tension”, it is a perfect example of good observations coming up with contradictory data that no theory can explain.

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Airbus signs China’s Qianfan or Spacesail constellation to provide internet on its airplanes

10:14 am

In what is a major coup for one of China’s planned large constellations, Airbus yesterday agreed to use the Qianfan or Spacesail constellation to provide Wi-Fi service on its airplanes.

At a satellite internet industry ecology conference in east China’s Shanghai on Thursday, Airbus signed a market cooperation agreement on the satellite internet service with Shanghai Spacesail Technologies Co., Ltd. The Spacesail Constellation will provide high-speed, low-latency broadband satellite services via the high-speed connectivity system on aircraft, enhancing the in-flight experience for passengers.

The two parties will also work together to meet the needs of airlines, and promote the development of intelligent, personalized services based on low-orbit broadband communication technology.

Starsail is a direct competitor to Starlink. China has so far launched 119 satellites out of a planned first phase constellation of 648. Later phases could increase the constellation to as many as 10,000 satellites.

It seems puzzling why Airbus went with this Chinese constellation, rather than either Starlink or Amazon’s Leo (formerly Kuiper). Starlink is far more developed, while Leo has more satellites in orbit (154 to 119) than Spacesail. And both are private companies from the capitalistic west, not pseudo-companies controlled by the Chinese communists.

Maybe this deal is preliminary to a major purchase of Airbus airplanes by China. China wanted its system on those planes, and so Airbus agreed to go along.

Regardless, this deal tells us that this Chinese internet constellation is going to be a major competitor to both Starlink and Leo.

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New images of interstellar Comet 3I/Atlas

9:56 am

New Hubble image of 3I/Atlas
Click for original.

Juice image of 3I/Atlas
Click for original.

Both NASA and the European Space Agency (ESA) yesterday released new photos of the interstellar comet 3I/Atlas.

First, NASA released the image on the right, taken on November 30, 2025 by the Hubble Space Telescope. At the time the comet was about 178 million miles away. It clearly shows the comet’s coma of material, surrounding a bright nucleus at the center. The streaks are background stars.

Next, the mission team for Europe’s Juice probe, on its way to Jupiter, released one small portion of a picture taken by its navigation camera. That picture is the second to the right.

During November 2025, ESA’s Jupiter Icy Moons Explorer (Juice) used five of its science instruments to observe 3I/ATLAS. The instruments collected information about how the comet is behaving and what it is made of. In addition, Juice snapped the comet with its onboard Navigation Camera (NavCam), designed not as a high-resolution science camera, but to help Juice navigate Jupiter’s icy moons following arrival in 2031.

Though the data from the science instruments won’t arrive on Earth until February 2026, our Juice team couldn’t wait that long. They decided to try downloading just a quarter of a single NavCam image to see what was in store for them. The very clearly visible comet, surrounded by signs of activity, surprised them.

Not only do we clearly see the glowing halo of gas surrounding the comet known as its coma, we also see a hint of two tails. The comet’s ‘plasma tail’ – made up of electrically charged gas, stretches out towards the top of the frame. We may also be able to see a fainter ‘dust tail’ – made up of tiny solid particles – stretching to the lower left of the frame.

The image was taken on 2 November 2025, during Juice’s first slot for observing 3I/ATLAS. It was two days before Juice’s closest approach to the comet, which occurred on 4 November at a distance of about 66 million km.

Because Juice is presently behind the Sun (as seen from Earth), most of the data it collected during its closest approach won’t be downloaded until February. This one partial image is only a fore taste.

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China launches two small test communications satellites

9:35 am

China today successfully placed two experimental communications satellites into orbit, its solid-fueled Kuaizhou-1a rocket lifting off from its Jiuquan spaceport in northwest China.

China’s state-run press provided no information on where the rocket’s lower stages crashed. The rocket is supposedly owned and operated by a Chinese pseudo-company, but its solid-fueled heritage clearly comes from military missiles, and thus could only have been developed and used under the full supervision of China’s military.

The leaders in the 2025 launch race:

159 SpaceX
76 China (a new record)
15 Rocket Lab
15 Russia

SpaceX still leads the rest of the world in successful launches, 159 to 128.

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“Blemish” on Orion hatch’s “thermal barrier” delays countdown rehearsal

9:24 am

According to a report yesterday, a countdown rehearsal two weeks ago for the Orion/SLS stack that also included the four astronauts to fly on the next mission was delayed because a “blemish” was found on the Orion hatch “thermal barrier.”

“Prior to the countdown demonstration test, the agency had planned to conduct a day of launch closeout demonstration. This demonstration was paused when a blemish was found on the crew module thermal barrier, preventing hatch closure until it could be addressed,” the statement read. “A repair was completed on Nov. 18 allowing the closeout demo to successfully complete on Nov. 19. To allow lessons learned from the closeout demo to be incorporated into the planning for the countdown demonstration test, the decision was made to proceed into water servicing next and place the countdown demonstration test after this servicing completes.”

It was not clear from the NASA statement how a ‘blemish’ prevented the closure of the hatch and NASA would not say exactly when the countdown rehearsal will take place. Declining to provide further details, the space agency spokesperson said: “NASA remains on track to launch Artemis 2 no later than April 2026 with opportunities to potentially launch as soon as February.”

NASA released no additional details, though it claimed this delay will have no impact on the launch schedule for the Artemis-2 mission, planned for launch no later than April 2026.

The lack of detailed information from NASA is disturbing. What was the “blemish?” It appears it was on the rubber gaskets that circle the hatch’s edge. What caused it? Was it some damage? A production flaw? NASA’s general silence forces us to consider more serious possibilities.

I continue to pray that these four astronauts are not going to end up as sacrificial lambs to the political scheduling demands that is forcing NASA to push on blindly, as it did with both the Challenger and Columbia failures, ignoring or minimizing issues that common sense should never be minimized.

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Boeing is still not off the hook for its malfeasance behind the two 737-Max crashes that killed 346

3:06 pm

Boeing Logo

It turns out that one week after a judge approved a plea deal in early November between Boeing and the Justice Department that would allows the company to avoid a criminal prosecution for its malfeasance and fraud that led to two 737-Max airplane crashes that killed a total of 346 people — thus dismissing the pending criminal charges — the families of the victims filed an appeal, asking a higher court to overturn that deal.

The families had argued before U.S. District Court Judge Reed O’Connor that the Department of Justice’s (DOJ) non-prosecution agreement violated the judicial review provisions, which was reached behind closed doors without the families’ statutory right to confer. The writ of mandamus argues that no substantive proceedings before Judge O’Connor were held before he made his decision in favor of Boeing.

…DOJ initially presented Judge O’Connor with a non-prosecution agreement (NPA) that he rejected. Instead of coming back with something more stringent, DOJ presented Boeing with the lesser punishment of an NPA in which Boeing would merely pay a $243.6 million penalty, give $444.5 million to be divided amongst the 346 families, and make additional investments in its safety and compliance. In exchange, the DOJ agreed to dismiss the criminal charge against Boeing. On November 6, Judge O’Connor approved this revised NPA and granted the government’s motion to dismiss.

The families now look forward to the Fifth Circuit Court of Appeals to reverse this decision through its writ of mandamus. In the writ, Paul Cassell, pro bono, attorneys for the families and professor of the S.J. Quinney College of Law at the University of Utah, argued on behalf of the families’ that the government’s NPA with Boeing would not provide sufficient oversight of Boeing and failed to account for the fact that Boeing’s criminal behavior was found to have caused the deaths of 346 crash victims. Boeing’s CEO and its lawyers had admitted to the fraud in a guilty plea issued four years ago.

In 2021 Boeing itself pleaded guilty to malfeasance and corruption charges, and was given three years to clean up its act or face criminal prosecution. When after three years Justice found Boeing had instead lied to it while doing little to fix things, it first proceeded with prosecution, only to suddenly back off and make this plea deal.

Thus, the families’ case is strong. Boeing is an admitted criminal and has also done nothing to change its behavior. Whether the families can get the plea deal overturned, however, remains unknown. The legal system no longer can be trusted when it comes to big government contractors like Boeing. The government acts routinely to protect them (as Justice is doing here), and thus there will be heavy political pressure on the courts to turn down this appeal.

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The insane terrain inside Mars’ Death Valley

12:30 pm

taffy terrain
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on October 27, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

The science team labels this a “twisted surface,” to which I think we all can agree. What we are looking at is a geological feature found only on Mars in only one region that has been labeled “taffy terrain” by scientists. According to a 2014 paper, the scientists posit that this material must be some sort of “a viscous fluid,” naturally flowing downward into “localized depressions.” Because of its weird nature I have posted many cool images of it in the past (see here, here, here, here, here, and here).

In the case of the image to the right, the red dot marks the peak of a small knob, with the green dot on the upper left the low point about 900 feet below. As you can see, the taffy has migrated into the depressions, as some flowing material would.
» Read more

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Ground-based telescope actually photographs an exoplanet

10:51 am

exoplanet imaged directly
Click for original movie.

Using a new instrument on the Subaru Telescope in Hawaii astronomers have not only discovered a massive exoplanet orbiting a star, they have been able to actually photograph the planet itself.

The arrow in the picture to the right shows that planet. That picture is a screen capture from a short movie complied from five observations taken over several months earlier this year, showing the planet as it orbited the star, the light of which is blocked out so as to not blind the camera. From the press release:

The newly discovered planet, HIP 54515 b, orbits a star 271 light-years away in the constellation Leo. With nearly 18 times Jupiter’s mass, it circles its star at about Neptune’s distance from our Sun. But the star and planet appear very close when seen from Earth; roughly the size that a baseball seen 100 km away would appear. The SCExAO system produced extremely sharp images allowing us to see the planet.

The astronomers also used this new instrument to image a brown dwarf star with a mass equivalent to sixty Jupiters about 169 light years away.

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Weird mottled terrain in the dry tropics of Mars

1:11 pm

Mottled ridges
Click for full image.

Cool image time! The picture to the right, cropped, reduced, and enhanced to post here, was taken on October 28, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Labeled by the science team as “mottled ridged terrain,” it shows a relatively flat area of scattered broken-up flat-topped ridges and knobs, following no clear pattern of formation.

In trying to research this, I could only find one paper [pdf] discussing this kind of mottled ridges that did a survey of similar features across a large region to the northwest. That paper could not determine what caused such features, but came up with hypothesis. From the abstract:

While it is not possible to determine the precise formation mechanism of these polygonal ridge networks from our new data, their formation can be assessed in terms of three possibly separate processes: (1) polygonal fracture formation, (2) fracture filling and (3) exhumation. We find that polygonal
fracture formation by impact cratering and/or desiccation of sedimentary host deposits is consistent with our results and previous spectral studies. Once the polygonal fractures have formed, fracture filling by clastic dikes and/or mineral precipitation from aqueous circulation is most consistent with our results. Exhumation, probably by aeolian processes that eroded much of these ancient Noachian terrains where the ridges are present caused the filled fractures to lie in relief as ridges today.

To put this in plain terms, the initial polygon-patterned cracks were formed by either an impact or the drying out of the surface (similar to the cracks seen on dried mud here on Earth). Both could have contributed. Then material welled up from below, either lava or mud, that hardened to fill the cracks. Later erosion by wind stripped away the surface, leaving behind these broken ridges.

As always, the location adds some very interesting context.
» Read more

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Sunspot update: Sunspot activity again crashes far below predictions

11:17 am

It is the start of another month, so it is time again to post my monthly update of the never-ending sunspot cycle on the Sun, using NOAA’s own monthly update of its graph of sunspot activity and annotating it with extra information to illustrate the larger scientific context.

The green dot on the graph below indicates the level of sunspot activity on the Sun’s Earth-facing hemisphere during the month of November. And once again, the Sun surprised us, producing far less sunspots than expected, based on the April 2025 prediction by NOAA’s panel of solar scientists (as indicated by the purple/magenta line).
» Read more

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France’s space agency CNES found liable for environmental damage at French Guiana spaceport

9:36 am

French Guiana spaceport
The French Guiana spaceport. The Diamant launchsite is labeled “B.”
Click for full resolution image. (Note: The Ariane-5 pad is now the
Ariane-6 pad.)

France’s space agency CNES, which has taken back management from Arianespace of the French Guiana spaceport it owns, has now been found liable for destroying a protected habitat as it began construction to upgrade the old abandoned Diamant rocket launch site into a pad for several of Europe’s new commercial rocket startups.

In March 2022, the regional environmental authority of French Guiana (DGTM) formally informed CNES that it could not begin demolition or earthworks at the Diamant site without first securing the legally required species and water-law authorisations. Despite this, the agency leveled the area in the preceding weeks, with the environmental NGO CERATO discovering the destruction in April 2022.

In August 2022, the DGTM carried out an unannounced inspection of the Diamant site and found further destruction of protected habitats linked to the agency’s PV2 solar farm project. In October 2022, the PV2 project manager informed DGTM that CNES had known about the presence of protected species on the PV2 site since 1 July 2022, yet began earthworks anyway.

In response to repeated flouting of DGTM procedures, the Prefect of French Guiana, the top regional authority, issued a stop-work order requiring CNES to halt all works at both sites.

It appears this stop-work order has contributed to delays in construction. The news now is that the case appears to have been settled.

The agency has been ordered to repair the damage within three years or face a fine of €50,000. It will also be required to finance ecological compensation actions elsewhere on the grounds of the Guiana Space Centre. The conclusion of the lawsuit will allow the agency to fully resume construction at the site, which it had been ordered to stop in late 2022.

In other words, CNES has been told to spend money elsewhere at the spaceport to make the local environmental authorities happy. It remains unclear how these delays have or even will impact the plans of the Spanish rocket startup PLD, which hopes to do the first orbital launch of its Miura-5 rocket from this site in 2026. PLD expects the first flight-worthy Miura-5 to be delivered to French Guiana early next year, so the delays in French Guiana have not yet effected its plans. That might now change if the site won’t be ready as planned.

This whole story however does indicate a fundamental problem within all of Europe’s space regulatory infrastructure that in the future is likely to hinder the development of its new commercial space industry. Europe’s leadership likes its red tape, and has done nothing to reduce it as it has shifted from the government-run model (where it controls and owns everything) to the capitalism model (where it buys what it needs from an independent competing private sector).

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Russian astronaut kicked out of the U.S. for stealing proprietary SpaceX designs

9:10 am

A Russian astronaut scheduled to fly on the next upcoming Dragon mission to ISS as part of the barter agreement between NASA and Roscosmos, has been removed from that mission after being caught taking pictures of SpaceX equipment in violation of State Department ITAR regulations.

Russian cosmonaut Oleg Artemyev has been removed from the prime crew of SpaceX’s Crew-12 mission to the International Space Station and replaced by fellow Roscosmos cosmonaut Andrey Fedyaev after sources alleged he photographed confidential SpaceX materials in California in violation of US export control rules, according to The Insider on December 2.

The outlet reported that Trishkin also said NASA did not want the controversy around Artemyev to become public, while Artemyev was removed from training at SpaceX’s Hawthorne California, facility last week after allegedly photographing SpaceX engines and other internal materials on his phone and taking them off-site.

The sources for this story all come from within Russia but it appears the story is true. It now appears that when the next manned Dragon launches to ISS in February, Fedyaev will fly instead of Artemyev.

The irony of this is that Russia doesn’t really have the capability of developing a comparable SpaceX rocket using this information. If anything, it would be more likely for Russia to sell the information to China in exchange for military hardware it could use in the Ukraine.

Either way, this violation by Artemyev of ITAR does not speak well for the future of the U.S./Russian partnership in space. It will certainly continue until ISS is retired, but this incident cements the likelihood that it will then end. None of the American commercial stations have shown any interest in signing agreemennts with Russia, though they all have signed numerous international deals, some with former Soviet bloc nations and even former Soviet provinces. After ISS Russia will be on its own.

And based on its inability to develop anything new in the past three decades, don’t expect much from it in space.

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China’s Zhuque-3 copycat Falcon 9 reaches orbit on first launch; 1st stage crashes

10:32 pm

Zhuque-3 at launch
Screen capture from China’s
state-run press

The methane-fueled Zhuque-3 rocket built by China’s Landspace pseudo-company successfully reached orbit today on its first launch, though the attempt to land the first stage vertically for later reuse failed when it crashed near its landing zone.

The reusable rocket, designed by the Beijing-based commercial space company LandSpace, was launched from the Jiuquan Satellite Launch Centre in China’s northwest at noon on Wednesday. After reaching a low-Earth orbit, the first stage of the rocket – the lower section that lifts the vehicle off the ground – appeared to catch fire in the air before crashing near the target recovery site.

I think a video of that failed landing can be seen here, though I cannot be sure, as it appeared to go up on youtube immediately at launch time, almost too soon.

For the Landspace pseudo-company, getting this rocket to orbit on the first try is a major success. It plans several more launches in the coming months, with each attempting a similar landing. Based on SpaceX’s history in this matter, it should not take it long to achieve its first landing success.

The leaders in the 2025 launch race:

158 SpaceX
75 China (a new record)
15 Rocket Lab
15 Russia

SpaceX still leads the rest of the world in successful launches, 158 to 127.

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Astronomers detect another galaxy that shouldn’t be there, so soon after the Big Bang

11:38 am

A spiral galaxy too early in the universe
Click for original.

Using the Webb Space Telescopes astronomers have detected another galaxy that shouldn’t be there, so soon after the Big Bang.

The image to the right comes from figure 1 of the peer-reviewed paper. The galaxy’s two spiral arms form a backward “S” emanating out from the galaxy’s nucleus. From the press release:

Using JWST, researchers Rashi Jain and Yogesh Wadadekar spotted a galaxy remarkably similar to our own Milky Way. Yet this system formed when the cosmos was barely 1.5 billion years old—roughly a tenth of its present age. They named it Alaknanda, after the Himalayan river that is a twin headstream of the Ganga alongside the Mandakini—fittingly, the Hindi name for the Milky Way.

…It already has two sweeping spiral arms wrapped around a bright, rounded central region (the galaxy’s ‘bulge’), spanning about 30,000 light-years across. Even more impressively, it is annually churning out new stars, their combined mass roughly equivalent to 60 times the mass of our Sun. This rate is about 20 times that of the present-day Milky Way! About half of Alaknanda’s stars appear to have formed in only 200 million years—a blink in cosmic time.

This galaxy underlines the difficulty for cosmologists by much of Webb’s data of the early universe. Present theories of galaxy formation say it should take billions of years to form such a spiral galaxy, meaning it shouldn’t exist as yet so soon, only 1.5 billion years after the Big Bang.

Either the theories have to be revised substantially, or they are simply wrong entirely. Or we are missing or lacking in some fundamental information about the early universe that skews all our theories.

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Three new papers find sugars, “gum,” and lots of stardust in the samples brought back from the asteroid Bennu

10:24 am

Bennu
The asteroid Bennu

Three new papers published this week have found that the samples brought back by OSIRIS-REx from the asteroid Bennu contained some unexpected or unusual materials, including sugars that are important for biology, a gumlike material never seen before, and a much higher amount of stardust than expected.

The papers can be read here, here, and here.

As the press release notes, describing the sugar discovery:

The five-carbon sugar ribose and, for the first time in an extraterrestrial sample, six-carbon glucose were found. Although these sugars are not evidence of life, their detection, along with previous detections of amino acids, nucleobases, and carboxylic acids in Bennu samples, show building blocks of biological molecules were widespread throughout the solar system.

The stardust results found six-times the abundance previously found in other samples.

As for the “gum”, this was possibly the strangest discovery of all, coming from the solar system’s earliest time period.
» Read more

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All eight ports on ISS occupied for the first time; Longest manned mission about to start?

9:56 am

ISS as presently configured
ISS as presently configured. Click for original.

For the first time in its more than quarter century history, all eight docking ports on ISS are occupied, as shown in the graphic to the right.

For the first time in International Space Station history, all eight docking ports aboard the orbital outpost are occupied following the reinstallation of Northrop Grumman’s Cygnus XL cargo spacecraft to the Earth-facing port of the station’s Unity module. The eight spacecraft attached to the complex are: two SpaceX Dragons, Cygnus XL, JAXA’s (Japan Aerospace Exploration Agency) HTV-X1, two Roscosmos Soyuz crew spacecraft, and two Progress cargo ships.

This milestone follows the reattachment of the Cygnus XL spacecraft, supporting the Northrop Grumman-23 commercial resupply services mission for NASA, which was removed last week by the robotics officer at the agency’s Mission Control Center in Houston using the space station’s Canadarm2 robotic arm. The Cygnus XL movement was coordinated between NASA, Northrop Grumman, and Roscosmos to provide appropriate clearance for the arriving crewed Soyuz MS-28 spacecraft on Nov. 27.

Cygnus will remain attached to the orbiting laboratory until no earlier than March 2026, when it is scheduled to safely depart and dispose of up to 11,000 pounds of trash and unneeded cargo when it harmlessly burns up in Earth’s atmosphere.

This situation will not last of course, and in fact it may never happen again before the station is retired around 2030. First, Cygnus will leave in March. Second, one Russian Soyuz capsule will leave shortly, as the presence of two simply indicates a crew rotation is underway.

Third, it is presently unclear when the Russians will be able to launch further Soyuz or Progress capsules. » Read more

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China reveals its plans for the damaged Shenzhou-20 capsule docked to Tiangong-3

9:28 am

The Tiangong-3 station, as presently configured
The Tiangong-3 station, as presently configured,
with two Shenzou capsules docked at either end.

Having successfully docked Shenzhou-22 as a lifeboat to its Tiangong-3 space station last week, China’s state-run press yesterday outlined its plans for the damaged Shenzhou-20 capsule that is still docked to the station but cannot be used by its crew because of cracks in one viewport.

First, China’s space operations have decided to attempt a return of the capsule back to Earth, unmanned, so the damage can be inspected in greater detail. Before that happens however the astronauts on board the station will do their own inspection, including the possibility of adding a patch.

During a subsequent spacewalk, the Shenzhou-21 crew, who are now undertaking a six-month orbital stay, may be tasked with inspecting the cracked viewport. They may also perform protective work on it using specialized devices delivered by the Shenzhou-22 launch — a procedure still being validated in ground tests, said Ji in a recent CCTV interview.

A day prior to their planned return on Nov. 5, the Shenzhou-20 crew spotted an anomaly on the viewport’s edge — a triangular, paint-like mark. They photographed it from multiple angles and under different lights, while the station’s robotic arm cameras were employed to take supplemental external pictures.

The flaw was later identified as “penetrating cracks,” said Jia Shijin, chief designer of the crewed spaceship system from China Academy of Space Technology. “The space debris responsible is preliminarily judged to be less than a millimeter in size, but struck with extremely high speed.”

This description of the damage is the most detailed China as yet revealed. These details certainly fit the description of an impact from an outside source, though considering China’s general lack of transparency some skepticism should still be retained. For example, we still do not know if these “penetrating cracks” mean the capsule is no longer holding its atmosphere, or if the crew has closed the capsule’s hatch to keep the air loss to a minimum.

Either way, it appears China’s engineers are concerned that this damage could cause a major break-up of the capsule during re-entry, and are thus considering options for covering it during that return.

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German rocket startup Isar gets launch contract from ESA

8:25 am

The German rocket startup Isar Aerospace yesterday announced it has won a launch contract from the European Space Agency (ESA) to place a satellite carrying a number of experimental payloads into orbit before the end of 2026.

Satellite launch service company Isar Aerospace has signed a contract with the European Space Agency (ESA) to launch the ΣYNDEO-3 mission under the European Union’s In-Orbit Demonstration and In-Orbit Validation Programme (IOD/IOV). The launch will be carried out from Isar Aerospace’s dedicated launch complex at Andøya Space in Norway from Q4 2026.

…Redwire is the prime contractor for the ΣYNDEO-3 mission and will be delivering its Hammerhead spacecraft for a launch onboard Isar Aerospace’s launch vehicle Spectrum to a low Earth orbit (LEO). The spacecraft was built and integrated at Redwire’s state-of-the-art satellite processing facility in Belgium. The spacecraft aggregates 10 innovative payloads from six countries and institutions: Spain, France, Germany, Italy, Luxembourg and the EC.

Isar has yet to reach orbit with its Spectrum rocket. The first launch failed in March only seconds after launch. A second attempt is presently scheduled for sometime prior to December 21, 2025, lifting off from Andoya.

This is the second new launch contract Isar has announced in the past two weeks, and the third since September. At the moment it appears it is gaining momentum pending that first launch later this month, especially because a successful December launch would make it the first European rocket startup to successfully reach orbit.

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SpaceX gets Air Force approval to launch and land Starship/Superheavy at Cape Canaveral

12:01 am

Cape Canaveral

The Air Force announced late yesterday [pdf] that it will now allow SpaceX to launch its Starship/Superheavy rocket at Space Launch Complex 37 (SLC-37) at Cape Canaveral in Florida (as shown on the map to the right) as many as 76 times per year, with twice that number of landings.

The DAF [Department of Air Force] decision authorizes SpaceX to use SLC-37 at CCSFS [Cape Canaveral Space Force Station] to support Starship-Super Heavy launch and landing operations, including the redevelopment of SLC-37 and the other infrastructure improvements required and analyzed in the FEIS [Final Environmental Impact Statement]. Under this ROD [record of decision], upon execution of the real property agreement and associated documentation, and as analyzed in the FEIS while adhering to the mitigation measures specified in Appendix A to this ROD, SpaceX is authorized to: (1) undertake construction activities necessary to re-develop SLC-37 and associated infrastructure for Starship Super Heavy operations; (2) conduct prelaunch operations, including the transportation of launch vehicle components and static fire tests; and (3) conduct up to 76 launches and 152 landings annually once a supplemental analysis of airspace impacts by the Federal Aviation Administration (FAA) is completed. [emphasi mine]

The deal also requires SpaceX to do some road upgrades in order to transport the rocket from its Gigabay to the launch tower. The company immediately announced on X yesterday that it has already begun construction, and expects to have three pads in Florida before all is done.

The final environmental impact statement [pdf] was released on November 20, 2025, and concluded in more than 200 pages that there will be no significant impact from these launch operations, something that should be self-evident after more than three-quarters of century of rocketry at the Cape. The existence of the spaceport acts to protect wildlife, because it limits development across a wide area.

The report suggested that some turtle species and one mouse specie might “affected adversely”, but it it also appears that risk was considered minor and not enough to block development. To deal with this however the impact statement requires SpaceX to do a number of mitigation actions, similar to what it is required to do at Boca Chica.

One fact must be recognized, based on the red tape and delays experienced by SpaceX during the Biden administration. Had Kamala Harris and the cadre that ran the White House under Biden had been in office now, this approval would almost certainly have not happened, or if it did, it would have likely been delayed for a considerable amount of time, into next year at the earliest. It is certain that Trump is clearing the path to prevent red tape and the administrative state from slowing things down unnecessarily.

This announcement also strengthens the likelihood that SpaceX will do at least one launch of Starship/Superheavy from Florida in 2026. And if not then, by 2027 for sure.

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Two launches today, by Arianespace and SpaceX

10:36 pm

Today there were two launches worldwide, one from South America and the second from the U.S.

First, Arianespace launched a South Korea imaging satellite from French Guiana, using the Vega-C rocket built and owned by the Italian rocket company Avio. Based on the July 2024 agreement, this is the next-to-last Vega-C flight that Arianespace will manage. After the next flight, Avio will take over management of its own rocket, cutting out this government middle man, though that agreement also allowed customers who had previously signed with Arianespace for later flights to stay with it as the managing organization.

Either way, Arianespace’s responsibilities will soon be limited solely to the Ariane-6 rocket, which itself has a limited future, being expendable and too expensive to compete in the present launch market.

Next SpaceX launched another 27 Starlink satellites into orbit, its Falcon 9 lifting off from Vandenberg Space Force Base in California. The first stage completed its 20th flight, landing on a drone ship in the Pacific.

As the Vega-C launch was only the sixth for Europe in 2025, it remains off the leader board for the 2025 launch race:

157 SpaceX (a new record)
74 China
15 Rocket Lab
15 Russia

SpaceX now leads the rest of the world in successful launches, 157 to 126.

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After being linked for almost six months, China’s Shijian 21 and Shijian 25 separate

9:32 am

After rendezvousing and doing repeated docking tests in June and July and then remaining linked since then, China’s Shijian 21 and Shijian 25 test satellites have now separated.

Optical ground observations Nov. 29 made by S2a systems, a Swiss company which develops and operates customized systems for optical space surveillance worldwide, reveal that the two satellites have now separated in geosynchronous orbit, close to the geostationary belt (GEO) at 35,786 km above Earth’s equator. The orbits of the pair are inclined by 4.6 degrees with respect to GEO.

The article at the link speculates that the spacecraft were doing refueling tests while docked, but while a good guess this has not been confirmed anywhere. China has said nothing.

Shijian-21 was launched in 2021, and was used to grab a defunct Chinese geosynchronous satellite and tug it to a graveyard orbit. Shijian-25 was launched in January 2025, apparently intended to test robotic servicing of satellites. These maneuvers with Shijian-21 appear to be part of those tests. Whether those tests included refueling is uncertain, though possible. If Shijian-21 proceeds to do additional satellite tug maneuvers then it will strongly suggest this refueling occurred and was successful.

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SpaceX launches another 29 Starlink satellites

12:51 am

SpaceX in the early morning hours today successfully launched 29 more Starlink satellites, its Falcon 9 rocket lifting off from the Kennedy Space Center in Florida.

The first stage completed its fourth flight, landing on a drone ship in the Atlantic.

The leaders in the 2025 launch race:

156 SpaceX (a new record)
74 China
15 Rocket Lab
15 Russia

SpaceX now leads the rest of the world in successful launches, 156 to 125.

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South Korean rocket startup Innospace announces date for inaugural launch

10:24 am

The South Korean rocket startup Innospace late last week announced that it has delayed the date for the first launch of its Hanbit-Nano rocket a few days in order to correct a “minor anomaly” during testing in Brazil.

During the avionics integration test, INNOSPACE performed a detailed analysis of a minor signal anomaly observed in a specific segment of the test and confirmed the tolerance range of the integration profile affected by flight-environment variations. To further validate the findings, the company carried out a second test using a Brazilian Air Force aircraft under conditions closely replicating the actual flight environment, allowing for a comprehensive review of response characteristics and signal stability across all integration items.

The launch was previously scheduled for a launch window from November 22nd to December 17th, taking place from Brazil’s long unused Alcantara spaceport on its northeast coast. The new window now runs from
December 16th to December 22nd. The launch itself is now scheduled for December 17th.

If this launch is successful, South Korea will have leapfrogged past India, Japan, and Australia to be the first Asian country to have a private company successfully launch a rocket.

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New Australian rocket startup completes suborbital launch

10:13 am

Proposed Australian spaceports
Australian spaceports: operating (red dot) and proposed (red “X”)
Click for original image.

A new Australian rocket startup, AtSpace, announced earlier this week it had successfully launched a test suborbital rocket from the commercial spaceport Southern Launch on the south coast of Australia.

At 09:22 AM [on November 27th], the 12.2m tall vehicle rocketed from Southern Launch’s Koonibba Test Range, performed perfectly and flew close to the target altitude of 80km. The four-and-a-half-minute flight validated AtSpace’s hybrid propulsion technology before safely returning to Earth as planned.

According to the press release, the company was able to recover the rocket afterward.

The company’s website says it was founded in 2021, and plans an orbital rocket dubbed Kestral, using hybrid fuels. No target dates for a first launch however are provided.

AtSpace is Australia’s second rocket startup to launch, following Gilmour Space’s failed launch attempt from its own Bowen spaceport on the east coast of Australia. Gilmour hopes to try again next year.

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China launches classified payload into orbit

9:51 am

China early today successfully placed a classified satellite into orbit, its Long March 7A rocket lifting off from its coastal Wenchang spaceport in southern China.

Video of the launch can be seen here.

China’s state-run press provided no information about the satellite or payload.

China's communists to its citizens
China’s communists to its citizens “Nice business you got here.
Shame if something happened to it.”

In related news, that state-run press made official what had been rumored in late October, that the government has now formed a special agency to supervise the pseudo-companies in its faux commercial rocket industry.

In other words, the government has decided the little freedom it gave these pseudo-companies was too much. It is now going to coordinate their efforts from above, and do so much more tightly. I suspect this decision was prompted by the success of some of these companies — taking advantage of that small measure of freedom. The government’s has gotten some new rockets and satellite constellations. Now it can step in and take over, like the mobsters communist governments are.

The leaders in the 2025 launch race:

155 SpaceX
74 China (a new record)
15 Rocket Lab
15 Russia

SpaceX still leads the rest of the world in successful launches, 155 to 125.

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SpaceX launches another Transporter mission, including dozens of smallsats

11:52 am

SpaceX today successfully completed its fifteenth Transporter mission of smallsats, its Falcon 9 rocket lifting off from Vandenberg Space Force Base in California.

The two major customers for this mission were Planet Lab, placing 36 satellites for its imagery constellation, and Exolaunch, which acts as a launch manager for smallsat companies. It placed 58 payloads in orbit for many various companies. Another launch manager company, SEOPS, launched 7 payloads, while the European aerospace company OHB launched 8. Among the other payloads was Varda’s fifth re-usable capsule.

The rocket’s two fairings completed their fourth and fifth flights respectively. The first stage (B1071) completed its 30th flight, landing on a drone ship in the Pacific. With this launch this booster become the second SpaceX first stage to achieve at least thirty flights. As the rankings for the most reused launch vehicles below show, SpaceX now has four boosters close to becoming the most reused rockets ever.

39 Discovery space shuttle
33 Atlantis space shuttle
31 Falcon 9 booster B1067
30 Falcon 9 booster B1071
29 Falcon 9 booster B1063
28 Falcon 9 booster B1069
28 Columbia space shuttle

Sources here and here.

The leaders in the 2025 launch race:

155 SpaceX (a new record)
73 China
15 Rocket Lab
15 Russia

SpaceX now leads the rest of the world in successful launches, 155 to 124.

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