Tag: spaceflight

China launches two “test satellites”

7:46 pm

China earlier today successfully launched two test satellites for “experimental verification of Earth observation technologies, its Long March 2D rocket lifting off from its Xichang space port in southwest China.

No word on where the rocket’s lower stages, using very toxic hypergolic fuels, crashed inside China. The two satellites are part of the Shiyan family of satellites that have done rendezvous and proximity operations as well as surveillance of other satellites in orbit.

The leaders in the 2025 launch race:

126 SpaceX
58 China
13 Russia
12 Rocket Lab

SpaceX still leads the rest of the world in successful launches, 126 to 98.

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Modeling suggests Uranus’s moon Ariel needed underground oceans to shape its known surface

11:22 am

Ariel as seen by Voyager-2 in 1986
Ariel as seen by Voyager-2 in 1986.
Click for original image.

The uncertainty of science: Using computer modeling based on our scant data of the surface features of the Uranus moon Ariel, scientists now posit that underground oceans, some of gigantic depth as much as 100 miles deep, were required to shape those features.

“First, we mapped out the larger structures that we see on the surface, then we used a computer program to model the tidal stresses on the surface, which result from distortion of Ariel from soccer ball-shaped to slight football-shaped and back as it moves closer and farther from Uranus during its orbit,” Patthoff said. “By combining the model with what we see on the surface, we can make inferences about Ariel’s past eccentricity and how thick the ocean might have been.”

The team found that, in the past, Ariel needed to have an eccentricity of about 0.04 [to create those surface structures]. This is about 40 times larger than its current value. While 0.04 may not sound dramatic, eccentricity can strengthen the effects of tidal stresses, and Ariel’s orbit would have been four times more eccentric than that of Jupiter’s moon Europa, which is wracked by the tidal forces that push and pull it to create its cracked and broken surface. Yet, to the eye, the orbit will still resemble a circle.

“In order to create those fractures, you have to have either a really thin ice on a really big ocean, or a higher eccentricity and a smaller ocean,” Patthoff said. “But either way, we need an ocean to be able to create the fractures that we are seeing on Ariel’s surface.”

This result does not prove an underground ocean now exists, or even if one existed in the past. The data is based on the few fly-by images taken by Voyager-2 when it passed close to Uranus in 1986. Coverage of the entire surface of Ariel was not complete, nor did the images have much resolution. The data is suggestive of this conclusion, but not conclusive by any means.

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Webb: Accretion disk surrounding exoplanet rich in carbon molecules

10:14 am

Using the Webb Space Telescope, scientists have detected a host of carbon molecules inside an accretion disk that surrounds an exoplanet circling a baby star 625 light years away.

Infrared observations of CT Cha b were made with Webb’s MIRI (Mid-Infrared Instrument) using its medium resolution spectrograph. An initial look into Webb’s archival data revealed signs of molecules within the circumplanetary disk, which motivated a deeper dive into the data.

…Ultimately, the team discovered seven carbon-bearing molecules within the planet’s disk, including acetylene (C2H2) and benzene (C6H6). This carbon-rich chemistry is in stark contrast to the chemistry seen in the disk around the host star, where the researchers found water but no carbon. The difference between the two disks offers evidence for their rapid chemical evolution over only than 2 million years.

You can read the original paper here [pdf]. The exoplanet itself is thought to have a mass 14 to 24 times that of Jupiter, making it almost a brown dwarf star. The NASA makes a big deal claiming this disk is forming a moon around the exoplanet, but that is not what the paper finds. This research did not find any evidence of a new moon exoplanet.

Instead, the paper found an accretion disk rich in carbon molecules, a finding that is significant on its own. It also found that that the accretion disk around the central star, while lacking carbon molecules, appears rich in water.

In other words, this baby solar system is packed with the right material for eventually producing life. Moreover, in this system’s relatively short life, two million years, these materials were able to sort themselves out so that the star has one concentration of material while the exoplanet has another. Both facts suggest that organic chemistry is common in the universe, and can evolve fast.

That is the important discovery here.

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Two Japanese startups partner to fly the first private lunar sample return mission

9:53 am

Two Japanese startups, the lunar landing company Ispace and the orbital capsule startup ElevationSpace, have signed an agreement to develop the first private mission to bring samples back to Earth from the Moon.

Based on the agreement, Ispace and ElevationSpace will jointly pursue development to undertake a lunar return mission. Ispace has already demonstrated the technology to deploy a lander into lunar orbit through its two lunar missions operated in 2023 and 2025. The company is currently considering the development of an Orbital Transfer Vehicle (OTV), derived from its existing lunar lander development technology.

The collaboration aims to conduct a technology demonstration to verify the feasibility of missions utilizing an and the sample return re-entry capsule being developed by ElevationSpace, as well as to evaluate the overall system characteristics.

At the moment this project is only a PowerPoint proposal. Though Ispace has made two attempts to soft land an unmanned spacecraft on the Moon, neither was a success. It has three further contracts with NASA, ESA, and Japan’s space agency JAXA, but none has flown yet, and its orbital vehicle is only under development.

As for ElevationSpace, it has flown nothing yet as well. Its first demo satellite, designed to test re-entry and recovery, won’t fly until late next year, assuming its launch rocket, Isar’s new Spectrum, gets to orbit.

Nonetheless, this project illustrates the continuing shift to the private sector in space. The companies are doing this to demonstrate their capabilities in order to win contracts from both commercial and government customers.

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New study finds ice is better at dissolving iron than liquid water

9:34 am

In a result that could have a direct bearing on trying to understand the inexplicable geology of Mars, a new study has found that ice actually does a better job at releasing iron from mineral deposits than liquid water.

It was once believed that when iron-rich mineral deposits were locked in ice, the iron would stay put, but a new study from Sweden’s Umeå University shows that the ice itself is actually working better than permafrost melt to release the iron. The study showed that ice at -10 °C (14 °F) releases more iron from mineral deposits than liquid water at 4 °C (39.2 °F). “It may sound counterintuitive, but ice is not a passive frozen block,” says study co-author Jean-François Boily. “Freezing creates microscopic pockets of liquid water between ice crystals. These act like chemical reactors, where compounds become concentrated and extremely acidic. This means they can react with iron minerals even at temperatures as low as minus 30 degrees Celsius.”

The researchers also found that the seasonal freeze/thaw cycle helped this process, and that brackish fresh water did better in dissolving the iron than seawater.

The significance for Mars geology is that this suggests glacial ice in the alien Mars climate might be the catalyst for creating its meandering canyons that so much resemble features on Earth produced by liquid water. On Mars however no model yet has been convincingly successful in creating past conditions where liquid water could flow on the surface. Mars has either been is too cold or its atmosphere too thin to allow it.

This study suggests ice however could do the work. It also fits with other Martian data that suggests the same, that at the base of the Martian glaciers pockets of liquid water could exist that act to shape the canyons.

All of this is speculation on my part, but it seems that the planetary scientists who are studying Mars should take a close look at this research.

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Avio wins $47 million study contract to build reusable upper stage rocket

9:20 am

Avio's proposed reusable upper stage
Click for original.

The Italian rocket company Avio has won $47 million study contract from the European Space Agency (ESA) to begin design work on a reusable upper stage rocket.

The contract runs for two years, with a goal to “assess and prepare the requirements, the design and the technologies for both the ground and flight segments required for an upper stage demonstrator that in the future could return to Earth and be reused on another flight.”

In other words, Avio is not yet building this upper stage, but will use this money to work up a design. The Avio graphic to the right suggests the lower stage will be based on the first stage of Avio’s solid-fueled Vega-C rocket. The upper stage concept appears to resemble Starship, which suggests Avio will be aiming for a vertical landing, using the methane-fueled engines it is developing for its not-yet-launched Vega-E rocket.

This ESA contract once again shows that agency’s shift to the capitalism model. Rather than develop this idea in-house, as it has done so poorly in the past, ESA has asked a private company to do it, and own what it develops.

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SpaceX launches 28 Starlink satellites

7:49 pm

SpaceX this evening successfully placed another 28 Starlink satellites into orbit, its Falcon 9 rocket lifting off from Vandenberg Space Force Base in California.

The first stage, B1063, completed its 28th flight, landing on a drone ship in the Pacific. (This booster had been listed as the first stage on a launch two days ago, but it turns out the booster on that flight was B1082, completing its 16th flight.) The present rankings for the most reflights of a rocket:

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

Sources here and here.

The leaders in the 2025 launch race:

126 SpaceX
57 China
13 Russia
12 Rocket Lab

SpaceX now leads the rest of the world in successful launches, 126 to 97. China has a launch scheduled for this evening, but nothing as yet has been published about its status as of this posting.

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China completes two launches

2:01 pm

Since yesterday China successfully completed two launches from two of its interior spaceports.

First, it successfully launched what its state-run press described as a satellite that will “primarily support monitoring and research activities in weather forecasting, atmospheric chemistry and climate change”, its Long March 4C rocket lifting off yesterday from its Jiuquan spaceport in northwest China.

Then today China’s Long March 6A lifted off from its Taiyuan spaceport in north China, placing in orbit the eleventh set of satellites in the Guowang internet constellation, eventually aiming to be 13,000 satellites strong. China’s state-run press did not specify the exact number of satellites. Based on previous launches using the Long March 6A, the number was likely five, bringing the number of this constellation’s satellites now in orbit to 87.

No word on where the the lower stages of both rockets crashed inside China. This is even more critical with the Long March 4C, since it uses very toxic hypergolic fuels that can dissolve your skin if it touches you.

The leaders in the 2025 launch race:

125 SpaceX
57 China
13 Russia
12 Rocket Lab

SpaceX now leads the rest of the world in successful launches, 125 to 97.

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Canadian rocket startup Nordspace postpones first suborbital test launch

9:42 am

Proposed Canadian spaceports
Proposed Canadian spaceports

After trying twice earlier this week to launch its first suborbital test rocket from its Atlantic Spaceport in Newfoundland, the rocket startup Nordspace has decided to postpone that launch for at least several weeks, while it investigates the fuel leaks on the launchpad that caused fires during both launch attempts.

From the company’s website:

After detailed review over the last 15 hours, the root cause has been discovered to be related to our propellant quality slightly differing between vehicle tests at our test facility in Ontario, compared to our first launch test in Newfoundland and Labrador at our spaceport. This led to a fuel-rich scenario. All systems on the rocket and ground performed nominally after careful review. Personnel, rocket and the launch pad are perfectly safe and secure, and our safety systems operated nominally. As our company’s manufacturing and testing facilities are located in Ontario, there’s no expedient way to make the necessary modification with the temporary infrastructure and suppliers we have in place at our launch site.

This company is only about three years old, so this delay is hardly systematic to its operations. In that time they have established their own private spaceport, have built their first demo satellite (set to launch in June 2026), and developed a test suborbital rocket, Taiga, that is on the cusp of its first launch. The company is also developing its own rocket engines, as well as an orbital rocket dubbed Tundra.

Its speed puts to shame Canada’s other proposed spaceport in Nova Scotia, which was first proposed in 2016, and has far accomplished little. Many of its problems stemmed from the Ukraine War, which lost it the rocket it had hoped to market. Even so, it only signed its first launch customer in August of this year.

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Germany’s military commits to spending $41 billion on space through 2030

9:25 am

In another sign that the member nations of the European Space Agency (ESA) are increasingly going their own way, Germany’s defense minister announced yesterday that his agency plans to spend $41 billion on space through 2030.

According to a 25 September Bundeswehr (German Armed Forces) release published following the minister’s address, the €35 billion investment will cover five main priorities: hardening against data disruptions and attacks, improved space situational awareness, redundancy through several networked satellite constellations, secure, diverse, and on-demand launch capabilities, and a dedicated military satellite operations centre.

This commitment is going to definitely benefit the three German rocket startups, Isar Aerospace, Rocket Factory Augsburg, and Hyimpulse. It will also likely benefit the North Sea launch platform — based in Germany — that is being built by a German consortium that has already received almost one million from the government.

While the European partners in ESA have generally kept their military spending separate from that agency, in the past a large bulk of this defense spending would have been committed to ESA joint projects, such as funding the agency’s commercial launch operation, Arianespace, to do the launches. No more.

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NASA cancels Sierra Space’s contract for Dream Chaser cargo missions to ISS

8:01 am

Tenacity grounded in a warehouse
Tenacity grounded in a warehouse, with the
Shooting Star small cargo capsule attached to
its aft port.

NASA today announced it has modified its fixed-price cargo contract with Sierra Space, canceling the planned seven cargo missions as well as a demo docking mission, replacing this with one test flight that will simply go into orbit and then return to Earth.

After a thorough evaluation, NASA and Sierra Space have mutually agreed to modify the contract as the company determined Dream Chaser development is best served by a free flight demonstration, targeted in late 2026. Sierra Space will continue providing insight to NASA into the development of Dream Chaser, including through the flight demonstration. NASA will provide minimal support through the remainder of the development and the flight demonstration. As part of the modification, NASA is no longer obligated for a specific number of resupply missions, however, the agency may order Dream Chaser resupply flights to the space station from Sierra Space following a successful free flight as part of its current contract.

The first launch of Tenacity, the only Dream Chaser so far constructed, has been repeatedly delayed for the past two years, with no explanation from either the company or NASA. Those delays started in 2023 as engineers began the final ground testing before launch, so though we do not know what the issue is it is likely that testing found something fundamentally wrong with the spacecraft that Sierra could not afford to fix.

According to Sierra’s own press release, the company will target a late 2026 launch for that free flyer mission. The company still hopes that mission will make further flights possible, either purchased by NASA or by others wishing to use Tenacity for in-orbit manufacturing, something it first proposed last year.

In the past two years, Sierra has shifted its focus away from commercial manned space and more towards winning military defense contracts. Part of that decision might have come from the problems with Dream Chaser. The decision might have also been fueled by the company’s generally unsatisfactory experience working with Blue Origin on their proposed Orbital Reef space station. While Sierra committed cash to develop and test its LIFE inflatable module, including a full scale prototype, Blue Origin appeared to do nothing at all. As early as September 2023 there were rumors the partnership was falling apart.

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SpaceX launches 24 more Starlink satellites

12:13 am

SpaceX this evening successfully placed 24 additional Starlink satellites into orbit, its Falcon 9 rocket lifting off from Vandenberg Space Force Base in California.

The first stage completed its 28th flight, landing on a drone ship in the Pacific, moving it up into the top rankings for the most reuse by a rocket:

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

Sources here and here.

As for the 2025 launch race, this is the present leader board:

125 SpaceX
55 China
13 Russia
12 Rocket Lab

SpaceX now leads the rest of the world in successful launches, 125 to 95.

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