Author: Robert Zimmerman

Curiosity’s exploration of boxwork on Mount Sharp

11:55 am

Curiosity panorama, December 18, 2025
Click for high resolution panorama. For original images, go here, here, and here.

Overview map
Click for interactive map.

Cool image time! The panorama above was created from three photographs taken on December 18, 2025 (here, here, and here) by the right navigation camera on the Mars rover Curiosity.

The view is north, looking down the flanks of Mount Sharp and across the floor of Gale Crater to its rim about 20 to 30 miles away. In comparing this view with a similar one taken in July, it is obvious that the Martian atmosphere has become far dustier during the last six months. The rim and the mountains beyond are hardly visible now through the haze.

The blue dot on the overview map to the right marks Curiosity’s present position. The yellow lines indicate roughly the area covered by this panorama. The while dotted line indicates the rover’s travels, while the red dotted line its planned routes.

As you can see by both the rover’s tracks in the panorama above and the white dotted line in the overview, Curiosity has been traversing back and forth across the boxwork formation of criss-crossing ridges for more than half a year, as the science team attempts to decipher what caused these ridges and hollows. They have also done some drilling in this effort.

The science team has been getting close to the day it will move on, resuming Curiosity’s climb of Mount Sharp, but they keep finding things amidst this boxwork that requires additional study. For example, consider this from yesterday’s update:
» Read more

One comment

Spherex completes first infrared map of the sky

11:02 am

Spherex's first infrared map
Click for original image.

Astronomers have now released the first all-sky map produced by the new infrared space telescoe Spherex, launched in March.

The map to the right covers only some of the infrared wavelengths mapped, with the stars indicated by blue, green, and white, hot hydrogen gas by blue, and cosmic dust by red. Other false color maps map the universe’s galaxies, star forming regions, and numerous other heavenly phenomenon. From the press release:

Circling Earth about 14½ times a day, SPHEREx (which stands for Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer) travels from north to south, passing over the poles. Each day it takes about 3,600 images along one circular strip of the sky, and as the days pass and the planet moves around the Sun, SPHEREx’s field of view shifts as well. After six months, the observatory has looked out into space in every direction, capturing the entire sky in 360 degrees.

Managed by NASA’s Jet Propulsion Laboratory in Southern California, the mission began mapping the sky in May and completed its first all-sky mosaic in December. It will complete three additional all-sky scans during its two-year primary mission, and merging those maps together will increase the sensitivity of the measurements.

Spherex has a greater resolution across more infrared wavelengths than the previous wide-field infrared space telescope, WIRE. Its wide-field view also differs from Webb, which has a very small field of view to get high resolution infrared images of specific objects.

Leave a comment

A new commercial smallsat space telescope is now operational and offering its data to scientists

9:51 am

Mauve space telescope
Mauve space telescope. Click for source.

Capitalism in space: A new commercial optical space telescope with a 5-inch-wide mirror and dubbed the Mauve Telescope is now operational in orbit, with its private owner, UK startup Blue Skies, offering its data to scientists for an annual subscription fee.

Blue Skies is in the process of commissioning the Mauve and plans to start delivering data to scientists in early 2026. Customers include Boston University, Columbia University, INAF’s Osservatorio Astrofisico di Arcetri, Konkoly Observatory, Kyoto University, Maynooth University, the National Astronomical Observatory of Japan, Rice University, Vanderbilt University, and Western University.

The spacecraft’s three-year mission is to study flares from stars and their impact on the habitability of planets around them. From low Earth orbit, it hosts a telescope that can collect data in the ultraviolet to visual light range (200-700 nm spectrum).

With such a small mirror Mauve is not going to be able to do a lot of ground-breaking work, though there are definitely observations of value it can accomplish, such as those listed above. Its main purpose is as a demonstration project to attract a bigger round of new investment capital, from universities like the ones listed above, for launching a larger private telescope with greater capabilities.

This is how all telescopes were funded in the U.S. until World War II, through private funds privately built. Blue Skies effort here suggests we are heading back to that model, with government budgets increasingly constrained. The company is already working on a second and larger space telescope, dubbed Twinkle with a 18-inch primary mirror. It hopes over time to continue to scale up its orbital telescopes until it is matching Hubble and Webb, and doing so faster and at far less cost.

And for profit no less!

One comment

Scientist think they have detected a collision in the debris disk surrounding the star Fomalhaut

9:24 am

Fomalhaut asteroid collision
Click for original.

Using the Hubble Space Telescope, astronomers have detected a bright object in the debris disk that surrounds the nearby star Fomalhaut that wasn’t there previously, suggesting it is a glowing cloud of material left over from the collision of two asteroids.

You can read the published paper here [pdf]. Fomalhaut is a young star about 25 light years away, and has one of the best-mapped debris disks known.

The image to the right, reduced to post here, shows this new object, labeled CS2 and detected in 2023. CS1 is a similar detection from 2012 that was initially thought to be an exoplanet. When CS1 faded over time that theory was dismissed, replaced instead with the hypothesis that it was a cloud produced by an asteroid collision.

The recent appearance of CS2 strengthens this hypothesis, which will be further confirmed by future observations that show CS2 fading in the same manner. It also provides scientists a chance to measure the rate of such collisions within Fomalhaut’s debris disk, which scientists believe is essentially a baby solar system in formation. While very uncertain due to the short time scale, this data will help them begin to figure out the rate in which planets will form in such a disk.

One comment

Something caused a Starlink satellite to tumble and its fuel tank to vent

9:00 am

According to an update yesterday by SpaceX on X, one of its many Starlink satellites is now tumbling with its fuel tank venting, and is thus losing altitude.

On December 17, Starlink experienced an anomaly on satellite 35956, resulting in loss of communications with the vehicle at 418 km. The anomaly led to venting of the propulsion tank, a rapid decay in semi-major axis by about 4 km, and the release of a small number of trackable low relative velocity objects. SpaceX is coordinating with the @USSpaceForce and @NASA to monitor the objects.

The satellite is largely intact, tumbling, and will reenter the Earth’s atmosphere and fully demise within weeks. The satellite’s current trajectory will place it below the @Space_Station, posing no risk to the orbiting lab or its crew.

Either the tank burst, or got hit with something causing it to burst.

The media reports I’ve seen have tried to make this event more significant than it is. First, it is remarkable how few of SpaceX’s thousands of Starlink satellites have failed in this manner. These low numbers show how this incident is rare and not very concerning. Second, the spacecraft’s orbit is decaying, and will soon burn up harmlessly in the atmosphere. It will not add any space junk to low Earth orbit.

In fact, that this event illustrates more than anything how well SpaceX manages its Starlink constellation. Thousands of satellites launched, and only a handful have failed like this.

One comment

New Trump executive order today guarantees major changes coming to NASA’s Moon program

4:51 pm

Change is coming to Artemis!
Change is coming to Artemis!

The White House today released a new executive order that has the typically grand title these type of orders usually have: “Ensuring American Space Superiority”. That it was released one day after Jared Isaacman was confirmed as NASA administrator by the Senate was no accident, as this executive order demands a lot of action by him, with a clear focus on reshaping and better structuring the entire manned exploration program of the space agency.

The order begins about outlining some basic goals. It demands that the U.S. return to the Moon by 2028, establish the “initial elements” a base there by 2030, and do so by “enhancing sustainability and cost-effectiveness of launch and exploration architectures, including enabling commercial launch services and prioritizing lunar exploration.” It also demands this commercial civilian exploration occur in the context of American security concerns.

Above all, the order demands that these goals focus on “growing a vibrant commercial space economy through the power of American free enterprise,” in order to attract “at least $50 billion of additional investment in American space markets by 2028, and increasing launch and reentry cadence through new and upgraded facilities, improved efficiency, and policy reforms.”

To achieve these goals, the order then outlines a number of actions required by the NASA administrator, the secretaries of Commerce, War, and State, as well as the Director of the Office of Management and Budget (OMB) and the Assistant to the President for Domestic Policy (APDP), all coordinated by the assistant to the President for Science and Technology (APST).

All of this is unsurprising. Much of it is not much different than the basic general space goals that every administration has touted for decades. Among this generality however was one very specific item, a demand to complete within 90 days the following review:
» Read more

21 comments

December 18, 2025 Quick space links

2:55 pm

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

18 comments

New study: AI is corrupting the minds of children

12:26 pm

AI report
Click for source.

A new study has found that the unsupervised use of AI by young children increasingly has them involved in bad things that are violent and emotionally harmful.

A new report conducted by the digital security company Aura found that a significant percentage of kids who turn to AI for companionship are engaging in violent roleplays — and that violence, which can include sexual violence, drove more engagement than any other topic kids engaged with.

Drawing from anonymized data gathered from the online activity of roughly 3,000 children aged five to 17 whose parents use Aura’s parental control tool, as well as additional survey data from Aura and Talker Research, the security firm found that 42 percent of minors turned to AI specifically for companionship, or conversations designed to mimic lifelike social interactions or roleplay scenarios. Conversations across nearly 90 different chatbot services, from prominent companies like Character.AI to more obscure companion platforms, were included in the analysis.

Of that 42 percent of kids turning to chatbots for companionship, 37 percent engaged in conversations that depicted violence, which the researchers defined as interactions involving “themes of physical violence, aggression, harm, or coercion” — that includes sexual or non-sexual coercion, the researchers clarified — as well as “descriptions of fighting, killing, torture, or non-consensual acts.”

Half of these violent conversations, the research found, included themes of sexual violence. The report added that minors engaging with AI companions in conversations about violence wrote over a thousand words per day, signaling that violence appears to be a powerful driver of engagement, the researchers argue. [emphasis mine]

You can read the study here. As bad as this data above is, the most frightening aspect of the report is this quote:
» Read more

3 comments

Ancient Martian drainage into crater lake, now turned into ridges

11:41 am

Inverted channels
Click for original image.

Cool image time! The picture to the right, rotated, cropped, reduced, and sharpened to post here, was taken on September 9, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what the science team labels “an inverted channel.” From the caption:

Topographic inversion is a process where geologic features that were once low-lying, like impact craters or riverbeds, become elevated over time, like mesas or ridges. In this process, a crater or channel is filled with lava or sediment that becomes lithified [hardened]. If this infill is more resistant to erosion than the surrounding landscape, the less-resistant material can be eroded away by wind or water. The former crater or valley fill, being more resistant, remains elevated as the landscape around it lowers. The original low-lying feature becomes a mesa or ridge.

In this image, an ancient river network and nearby impact craters have undergone topographic inversion. Impact craters contain round mesas within them, and the stream channel is defined by a network of ridges.

The location of this inverted channel makes its history even more interesting.
» Read more

One comment

More delays expected in India’s first manned Gaganyaan orbital mission

9:30 am

Artist rendering of India's Gaganyaan capsule
Artist rendering of India’s Gaganyaan capsule

It appears that India’s space agency ISRO is now hinting that the first manned orbital flight of India’s Gaganyaan capsule will not occur in 2027 as planned, but could be delayed until 2028.

ISRO had hoped to fly the first unmanned orbital test flight, Gaganyaan G1, before the end of this year, followed by several more unmanned flights in 2026, with the manned flight in 2027. G1 however has slipped to early 2026, though it appears the mission is finally coming together.

In a response to a question posed at the Lok Sabha, the State Minister for Space, Jitendra Singh noted that the first Gaganyaan mission is nearly ready to fly, “Major infrastructure such as the Orbital Module Preparation Facility, Gaganyaan Control Centre, Crew training facility have been established. Second launch pad modifications have been incorporated. Precursor missions such as TV-D1 and IADT-01 have been successfully accomplished. Ground tracking networks, terrestrial links and IDRSS-1 feeder stations have been established. Crew Module Recovery plan as well as assets to be deployed have been finalized. For the first uncrewed mission (G1), all HLVM3 stages and CES motors are ready. Crew and Service Module systems have been realized. Assembly and integration activities are nearing completion.”

…The Gaganyaan G1 flight is the first of eight planned missions as part of an expanded programme cleared by the Union Cabinet last year with a total budget of Rs 20,193 crore. Initially, the programme was envisioned with two developmental flights followed by a crewed flight, with a budget of Rs 9,023 crore. There are now two crewed flights in the revised campaign, with ISRO aiming for the first crewed flight in 2027-28. [emphasis mine]

The highlighted dates are the first time ISRO has suggested the first manned flight might slip to 2028.

When the Gaganyaan program was first announced in 2018, the first manned flight was scheduled for 2022. Since then that schedule has been repeatedly delayed. I suspect ISRO’s schedule will only become more reliable after it finally completes that first G1 orbital test flight.

The endless incremental delays however are reminiscent of NASA’s Artemis program, designed to hide a sluggish program with problems.

2 comments

Kenya to build its own spaceport

9:04 am

Kenya spaceports
Kenya spaceports

The Kenyan government has now initiated a project to establish a second commercial spaceport on the country’s coast, located near the town of Kipini.

As stated in the document made public on December 16, 2025, the government is looking to recruit a skilled transaction advisor who is capable of analyzing the technical, financial, legal, environmental, and social feasibility of the construction of the spaceport based on a PPP model. The strategy utilizes Kenya’s location on the equator, which provides some benefits in satellite launches, among them lower fuel consumption, lower launch costs, and easier satellite placement in low-inclined orbits around the earth’s equatorial region.

…Under the plan, the transaction advisor will prepare a detailed feasibility study in line with the PPP Act, 2021. The study will include concept designs, launch vehicle options, infrastructure requirements, lifecycle cost estimates, and a phased implementation plan for the facility.

As shown on the map to the right, this new facility would be to the north of the San Marco offshore platform that had been used for eight launches by Italy from the ’60s to the ’80s and that the Italian rocket company Avio is now planning to re-open.

The Kenyan government apparently wants to build its own a launch site that it can offer to others to use.

3 comments

Station module builder Max Space announces new Thunderbird inflatable module

8:30 am

Thunderbird, with cut-out showing interior and person for scale
Thunderbird, with cut-out showing interior and person
for scale. Click for original images.

The startup Max Space yesterday unveiled a new larger and upgraded inflatable module, dubbed Thunderbird, that it proposes to sell to the various space stations being built in the U.S. and globally.

Thunderbird Station is built to support 4 or more crew members continuously, with an incredible 350m³ of pressurized volume, more than triple that of a standard ISS module. Launched on a single standard Falcon 9 rocket, the full expandable habitat launches compactly and expands 20x once deployed in orbit, requiring no in-orbit assembly. The interior features a novel reconfigurable architecture, morphic interior structure,that allows astronauts to dynamically adapt the space for research, manufacturing, or living during a mission. The design was developed in collaboration with veteran astronauts to take full advantage of three-dimensional volume in microgravity, not just traditional floor and wall space, to create the most spacious and functional habitable volume ever built. [emphasis in original]

The company also announced that it plans to fly a much smaller demonstration mission of this inflatable module design in the first quarter of 2027, launching on a Falcon 9 rocket and dubbed Mission Evolution.

The primary objective is to test and verify the on-orbit deployment of the expandable module with its exceptional micrometeoroid protection layers. After many years of successful ground testing and development, the flight unit is in full production and is scheduled for launch Q1 2027 onboard a scheduled SpaceX launch.

Max Space first appeared in 2024 when it announced its intention to fly an inflatable demo mission by 2025. Obviously that schedule has undergone some significant delays, though it appears the company used the time to refine its designs considerably. Its management includes one former NASA astronaut and one former member of the Bigelow space station team that built the first private orbiting inflatable modules, Genesis-1, Genesis-2, and BEAM (still operating on ISS).

The company is not trying to build its own space stations. Instead, it is marketing its inflatable modules to all the other space station startups as a quick way to get an additional large module added to their stations.

Hat tip to BtB’s stringer Jay.

One comment

South Korean rocket startup Innospace signs deal to launch from Australia

8:02 am

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

The South Korean rocket startup Innospace — about to attempt its first orbital launch from Brazil on December 19, 2025, earlier this week signed an agreement with Australia’s Southern Launch spaceport to launch its rockets from there.

Leading space mission service provider Southern Launch has signed South Korean launch service provider Innospace to conduct space missions from the Whalers Way Orbital Launch Complex and the Koonibba Test Range. This strategic partnership enables Innospce to conduct a diverse range of missions from Southern Launch sites, including orbital satellite launches and suborbital technology demonstrations.

Beginning in 2026 and continuing for at least the next decade, this agreement strengthens South Australia’s position as an emerging global hub for space innovation.

Whether or not its launch from Brazil’s long unused Alcantera spaceport is a success, it appears Innospace was looking for another spaceport option closer to South Korea. Moreover, Southern Launch has been an on-going active launch site for suborbital launches as well as a landing zone for spacecraft, unlike Alcantera which has sat unused for decades. That activity probably makes it a more viable place to operate.

Hat tip to BtB’s stringer Jay.

Leave a comment

Rocket Lab launches a set of technology test satellites for Space Force

10:19 pm

Rocket Lab tonight successfully placed into orbit a set of Space Force technology test satellites dubbed DISKSat, its Electron rocket lifting off from Wallops Island in Virginia.

DISKSat is a new standard satellite design, shaped like a flat disk about a yard across and developed by the Aerospace Corporation. The idea is that these disk-shaped satellites will more efficiently fit payload into the standard cylindrical fairings used by rockets. This mission includes four that will be deployed in low Earth orbit, but during the mission will also test operation in much lower orbits than satellites normally fly. I suspect the flat design reduces the atmospheric drag at those low orbits, thus allowing the satellite to remain in orbit for longer time periods.

The leaders in the 2025 launch race:

168 SpaceX
84 China
17 Rocket Lab (a new record)
15 Russia

SpaceX still leads the rest of the world in successful launches, 168 to 140.

5 comments

December 17, 2025 Quick space links

2:55 pm

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

5 comments

Jared Isaacman confirmed as NASA administrator

1:29 pm

Jared Isaacman during his spacewalk
Jared Isaacman during his spacewalk in September 2024

The Senate today finally confirmed Jared Isaacman to be the next NASA administrator, by a vote of 67 to 30.

All of the opposition came from Democrats, who fear Isaacman will eliminate several NASA centers in their states, centers that for decades have accomplished little but be jobs programs sucking money from the American taxpayer.

During hearings and private meetings with the senators Isaacman denied he had any intention to do this. In fact, the 62-page policy document Isaacman had written outlining his plans when he was first nominated for this position back in the spring makes it clear that is not his goal.

Instead, an honest read of that document shows that Isaacman has approached this position as administrator like the businessman he is. He intends to review every aspect of NASA’s operations and to restructure them to run more efficiently. For one example, he plans to eliminate the numerous “deputies” that every manager at NASA has been given. The managers should do the work, not hire a flunky to do it for them.

He also plans to review the next two Artemis missions, specifically looking at the Orion capsule and the questions relating to its heat shield and its untested environmental system. The concern that I and many others have expressed is that this capsule is not ready yet for a manned mission. The heat shield showed significant and unexpected damage on its return to Earth from its first unmanned mission around the Moon in 2022. Rather than replace it or redesign it, NASA has decided to push ahead and fly four astronauts on it around the Moon no later than April 2026. The agency’s solution will be to change the capsule’s flight path to reduce stress on the shield, a solution that might work but remains untested. It is also willing to fly the astronauts in a capsule with a untested environmental system. This NASA decision to push ahead is so it can meet the goal of Trump and Congress to get humans back on the Moon ahead of the Chinese, and hopefully within Trump’s present term of office.

In other words, NASA management is once again putting schedule ahead of safety and engineering, as it did with Challenger and again with Columbia.

It appears that Isaacman will at least review this situation. Whether he will have the courage to take the astronauts off that mission however remains unknown. He will certainly face fierce opposition from Trump and Congress if he does so.

7 comments

A unique place where waves repeatedly crash against each other

11:38 am

The phenomenon this post describes is hard to believe, but a group of bodyboard enthusiasts have discovered a specific spot in the ocean where the underground topography causes waves to smash against each other from four different directions, and do so with such tremendous force that water is flung hundreds of feet into the air.

And it’s not two waves converging – in many cases it’s actually two giant 12-footers colliding with another two smaller waves backwashing out from the shore, plunging simultaneously into a gap left by hydrodynamic forces over a reef close to the surface, causing a huge volume of water to rocket skyward as if a depth charge has gone off underneath the waves.

That footage has got to be seen to be believed, so I have embedded it below. This collision of waves happens again and again, at the same exact spot. There isn’t any unique physics or science going on however. What we are looking at is simply the amazing possibilities that ordinary physics presents to our infinite universe.
» Read more

7 comments

European sea-level satellite releases first data

10:39 am

First data from Sentinel-6B
Click for original.

The European Space Agency’s (ESA) Sentinel 6B satellite, launched a month ago, has now released its first sea-level data.

Following its launch on 17 November 2025, the first data from Sentinel-6B was captured on 26 November by the satellite’s Poseidon-4 altimeter. The image [to the right] is a combination of altimeter data from both the Sentinel-6 sea-level tracking satellites: Sentinel-6B and its twin, Sentinel-6 Michael Freilich, which was launched in 2020. The image shows the Gulf Stream current in the North Atlantic Ocean, off the eastern coasts of the US and Canada.

The Gulf Stream is a hugely important area of the North Atlantic Ocean, not only for the role it plays in global weather patterns and climate, but also because it’s a busy shipping route as well as a key ecosystem for marine species and therefore an important fishing zone.

What makes this particular government press release unusual is that though it is about a climate-related satellite, it makes no mention of global warming and how the sea level rise that has been recorded by the string of similar orbital satellites going back to 1993 is going to eventually drown us all. Maybe that’s because that total rise measured since 1993 equals only about 4 inches. That’s 4 inches of rise detected in more than three decades. At that rate, a little over an inch per decade, it will take centuries to drown anyone, but only those who refuse to walk a few feet to higher ground.

It could be the scientists and government PR hacks that are involved in writing this release also realized that the gig is up, and everyone now knows it, and it would only embarrass them further to push the global-warming hoax again.

4 comments

Two new NASA science spacecraft achieve “first light”

9:09 am

First lights from Carruthers and IMAP

According to two different NASA announcements today, two new science spacecraft designed to study the Sun’s environment have successfully demonstrated that their cameras and instruments are working as planned, having taken their “first light” data after their recent launches.

That data is to the right. On top is the first light data from the Carruthers Geocorona Observatory. From the caption:

The images were taken on Nov. 17, 2025, from a location near the Sun-Earth Lagrange point 1 by the spacecraft’s Wide Field Imager (left column) and Narrow Field Imager (right column) in far ultraviolet light (top row) and the specific wavelength of light emitted by atomic hydrogen known as Lyman-alpha (bottom row). Earth is the larger, bright circle near the middle of each image; the Moon is the smaller circle below and to the left of it. The fuzzy “halo” around Earth in the images in the bottom row is the geocorona: the ultraviolet light emitted by Earth’s exosphere, or outermost atmospheric layer. The lunar surface still shines in Lyman-alpha because its rocky surface reflects all wavelengths of sunlight — one reason it is important to compare Lyman-alpha images with the broad ultraviolet filter. The far ultraviolet light imagery from the Narrow Field Imagery also captured two background stars, whose surface temperatures must be approximately twice as hot as the our Sun’s to be so bright in this wavelength of light.

This data will help map the corona or Sun’s atmosphere, near the Sun.

On bottom is the first light data from IMAP (Interstellar Mapping and Acceleration Probe), which will work to map the very fringes of the solar system, the heliosphere that separates the Sun’s environment from interstellar space.

To map the heliosphere’s boundaries, IMAP is equipped with three instruments that measure energetic neutral atoms: IMAP-Lo, IMAP-Hi, and IMAP-Ultra. These uncharged particles, called ENAs for short, are cosmic messengers formed at the heliosphere’s edge that allow scientists to study the boundary region and its variability from afar.

…As IMAP travelled away from Earth, the IMAP-Ultra instrument looked back at the planet and picked up ENAs created by Earth’s magnetic environment. These terrestrially made ENAs, which overwhelm ENAs coming from the heliosphere in sheer numbers, is a reason why IMAP will be stationed at L1. There the spacecraft will have an unobstructed view of ENAs coming from the heliosphere’s boundaries.

…Earth’s magnetic environment can be seen glowing bright. … Earth sits at the center of the red donut-shaped structure.

Both spacecraft are still on their way to their final operational position at L1, so actual science operations have not yet begun.

Leave a comment

Three launches and one scrub overnight

8:38 am

Falcon 9 1st stage after landing for 30th time
Falcon 9 1st stage after landing for 30th time

In the past twelve hours there was one launch abort at T-0 and three successful launches.

First, Japan’s space agency JAXA attempted to launch a GPS-type satellite using its H3 rocket, built by Mitsubishi. The countdown reached T-0 but then nothing happened. The launch was then scrubbed because of an issue in the ground systems. No new date was announced.

Next, Arianespace, the commercial division of the European Space Agency (ESA), launched two European Union GPS-type satellites, Galileos 33 and 34, its Ariane-6 rocket lifting off from French Guiana.

This was Arianespace’s seventh launch in 2025, the most it has achieved since 2021, though still about 20-30% lower than the numbers it generally managed in the 2010s.

Finally, SpaceX followed with two launches on opposite coasts. First, its Falcon 9 rocket launched 29 Starlink satellites from the Kennedy Space Center in Florida, the first stage completing its sixth flight by landing on a drone ship in the Atlantic.

Shortly thereafter the company launched another 27 Starlink satellites, its Falcon 9 rocket lifting off from Vandenberg Space Force Base in California. The first stage (B1063) completed its 30th flight, landing on a drone ship in the Pacific. This stage is now the third Falcon 9 booster to reach 30 reuses:
» Read more

10 comments

December 16, 2025 Quick space links

2:45 pm

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

15 comments

Mars Reconnaissance Orbiter’s high resolution camera takes its 100,000 picture

1:54 pm

Oblique view
Click for original image.

Cool image time! On October 7, 2025, the science team that operates HiRISE, the high resolution camera on Mars Reconnaissance Orbiter (MRO), took its 100,000th picture since entering Mars orbit in March 2006.

The objective of this observation is to better resolve sand dunes and the rocky material underneath them. These dark, eroded rocks may be the source for some of these Syrtis Major sand dunes. Our image was suggested by a high school student enrolled in the Jefferson County Executive Internship program in Colorado in 2023, one of many public outreach programs the HiRISE Team engages in.

To celebrate this accomplishment and the fantastic geology of the scene, students and staff in the HiRISE Photogrammetry lab constructed this digital terrain model. This oblique image highlights the hummocky mounds of the plains that border Jezero Crater, which are among the oldest on Mars.

That oblique image, cropped, reduced, and sharpened to post here, is to the right. The location is about 50 miles to the southwest of Jezero Crater where the rover Perseverance landed.
» Read more

6 comments

Astronomers propose a new explanation for “Bright Blue Outbursts”

1:16 pm

Among the number of quick transient events discovered by the new automated survey telescopes on the ground and in space that have been built in the past two decades are something astronomers have labeled “bright blue outbursts”, bright flashes of blue and ultraviolet light that appear quickly and then fade away, leaving behind X-ray and radio emissions.

There are several theories as to what causes these flashes, but none are accepted whole-heartedly. Now a team of astronomers have looked at one flash and proposed a new theory.

This curious class of objects is known as luminous fast blue optical transients (LFBOTs), and with slightly more than a dozen discovered so far, astronomers have debated whether they are produced by an unusual type of supernova or by interstellar gas falling into a black hole.

Analysis of the brightest LFBOT to-date, named AT 2024wpp and discovered last year, shows that they’re neither. Instead, a team led by researchers from the University of California, Berkeley, concluded that they are caused by an extreme tidal disruption, where a black hole of up to 100 times the mass of our Sun completely shreds its massive star companion within days.

… “The sheer amount of radiated energy from these bursts is so large that you can’t power them with a core collapse stellar explosion — or any other type of normal stellar explosion,” says Natalie LeBaron, UC Berkeley graduate student and first author on the paper presenting the Gemini data [1]. “The main message from AT 2024wpp is that the model that we started off with is wrong. It’s definitely not just an exploding star.”

The researchers hypothesize that the intense, high-energy light emitted during this extreme tidal disruption was a consequence of the long parasitic history of the black hole binary system. As they reconstruct this history, the black hole had been sucking material from its companion for a long time, completely enshrouding itself in a halo of material too far from the black hole for it to swallow.

Need I mention that this theory, while better explaining the data, remains unconfirmed and decidedly uncertain.

2 comments

France and U.S. militaries complete rendezvous maneuvers in orbit

9:21 am

According to a statement by France’s military, the U.S. and France have successfully completed planned rendezvous maneuvers by two of their satellites in orbit.

These operations also apparently included the United Kingdom.

While the neither the US nor its allies have made public the satellites involved in any of the joint RPOs, the private space tracking firm COMSPOC said Sept. 19 that the maneuvers with the UK involved a US Geosynchronous Space Situational Awareness Program (GSSAP) neighborhood watch bird. The GSSAP satellite, USA 271, began moving on Sept. 5 and on Sept. 12 stopped just 13 kilometers (8.1 miles) from the UK’s SKYNET 5A military communications bird, the firm explained.

COMSPOC also watched the Franco-American pas-de-deux, which a company spokesperson told Breaking Defense involved another GSSAP, USA 324, and France’s SYRACUSE 3A. The satellites performed three sets of maneuvers: Nov. 11-14; Nov. 22-23; and Nov. 28-29, according to COMSPOC’s observations. “In all these movements, SYRACUSE 3A seems to lead and USA 324 seems to follow as the maneuvers performed by USA 324 is lagged by a day,” the spokesperson said, with the closest approach being about 25.1 kilometers (15.6 miles). [emphasis mine]

I have highlighted the distances above because these military maneuvers are actually quite unimpressive when compared with similar recent commercial rendezvous and proximity tests in orbit. The just completed Impulse/Starfish test for example got within 1.25 kilometers. And in 2024 Japan’s Astroscale did proximity operations within 50 meters of an old abandoned upper stage.

I suspect the best thing these militaries could do is to stop wasting money trying to do this themselves, and just hire the commercial companies instead. They’d do much better.

2 comments

Two launches early today

9:02 am

Both China and the American company ULA successfully completed launches since yesterday.

First, China placed the third satellite in an new Earth observation constellation, its Long March 4B rocket lifting off from its Taiyuan spaceport in northeast China.

Developed by the China Academy of Space Technology, the satellite will join the Ziyuan III 02 and 03 satellites already in orbit to form a high-precision observation constellation. Equipped with a stereoscopic mapping camera, multispectral camera, and laser altimeter, it will capture high-resolution 3D imagery critical for geographic data collection and natural resource management.

It appears however that this constellation is used by China’s military, so I suspect its purposes do not exactly match this description. China’s state-run press also provided no information as to where the rocket’s lower stages, using very toxic hypergolic fuels, crashed inside China.

Next, ULA launched another 27 Leo satellites for Amazon, its Atlas-5 rocket lifting off from Cape Canaveral in Florida. Amazon now has 181 satellites in orbit, with a requirement to get about 1,600 in orbit by July 2026 to meet its FCC license obligations. As it took about eight months to get those first 181 satellites into space (with SpaceX launching 72), Amazon’s three launch providers, ULA (42 launches), Arianespace (18 launches), and Blue Origin (27 launches), will have to ramp up their launch rate significantly to get even close to meeting those obligations in the next six months. There is also a question whether Amazon can manufacture enough satellites at a fast enough pace for those rockets.

As for the rocket, ULA now has only ten Atlas-5 rocket left in stock, with four reserved for Leo launches and six for Boeing’s Starliner manned capsule.

This was also ULA’s sixth launch in 2025. The leaders in the 2025 launch race:

166 SpaceX
84 China (a new record)
16 Rocket Lab
15 Russia

SpaceX now leads the rest of the world in successful launches, 166 to 138.

3 comments
1 2 3 … 1,140