Author: Robert Zimmerman

The growing mystery of the little red dots in the early universe

12:09 pm

The uncertainty of science: A review of the population of what scientists call “Little Red Dots” (LRDs) — discovered in the early universe by the Webb Space Telescope — has found that 30% do not appear to be compact objects when viewed in ultraviolet wavelengths.

The team studied 99 LRDs, and found that about 30% are not simply compact dots when observed in the ultraviolet.Instead, they reveal disturbed or clumpy structures, in stark contrast to their smooth, point-like appearance at optical wavelengths. Because these galaxies are so far away, their optical light is stretched, or “redshifted,” into the long-wavelength channel of JWST, where the resolution is not sharp enough to see structure, so they look like simple dots.

Rinaldi: ‘But their ultraviolet light is shifted into JWST’s short-wavelength channel, where the telescope has much finer resolution, and there we suddenly see clumps, asymmetries, and signs of interaction. On top of this, in the spectra of some of our LRDs we directly detect the fingerprints of active black holes, with gas moving at thousands of kilometres per second.’ This shows that at least part of this population is powered by growing black holes, while others seem to be dominated by star formation, making LRDs a mixed and diverse family of sources. This is a crucial clue, suggesting that mergers and galaxy interactions may be the trigger for the “LRD phase”.

In other words, astronomers don’t really know what these dots are at present. If some are supermassive black holes, this poses a problem for Big Bang cosmology, as there should not have been enough time since the Big Bang for these black holes to have formed.

That 70% still appear to be compact single objects might mean that’s what they are, but it could also mean that our present observations tools don’t yet have the ability to resolve them.

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Analysis of archived Cassini data finds a new slate of carbon-based molecules in the plumes of Enceladus

10:38 am

Enceladus at 77 miles
The tiger strip vents on Enceladus, seen
from 77 miles during 2015 fly-by. Resolution is
50 feet per pixel.

A new analysis of the archived Cassini data taken when the spacecraft flew through the plumes of the Saturn moon Enceladus in 2008 has revealed a number of new organic molecules (not life but carbon-based) that suggest the chemistry of the moon of Saturn is far more complex that expected.

You can read the paper here. From the abstract:

Here we present a comprehensive chemical analysis of organic-bearing ice grains sampled directly from the plume during a Cassini fly-by of Enceladus (E5) at an encounter speed of nearly 18 km [per second]. We again detect aryl and oxygen moieties in these fresh ice grains, as previously identified in older E-ring grains. Furthermore, the unprecedented high encounter speed revealed previously unobserved molecular fragments in Cosmic Dust Analyzer spectra, allowing the identification of aliphatic, (hetero)cyclic ester/alkenes, ethers/ethyl and, tentatively, N- and O-bearing compounds. These freshly ejected species are derived from the Enceladus subsurface, hinting at a hydrothermal origin and involvement in geochemical pathways towards the synthesis and evolution of organics.

In other words, this data further suggests there exists an underground ocean inside Enceladus, and that ocean has a lot of complex organic chemistry energized by the planet’s internal heat and the tidal forces imposed by Saturn’s gravity.

This is not the first time scientists have reviewed archived Cassini data of these plumes and found new molecules. It is simply a closer look at earlier analyses in 2018 and 2019.

This data has not discovered life, but it suggests that life is certainly possible within that proposed underground ocean. At a minimum, the chemistry there will be very complex and alien.

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Astronomers snap picture of a baby exoplanet

10:08 am

Baby planet
Click for original image.

Cool image time! The picture to the right, cropped to post here, was taken using Magellan Telescope in Chile and the Large Binocular Telescope in Arizona. The exoplanet is the small purple dot to the right of the star and the accretion ring that surrounds it.

This exoplanet is very young, only about five million years old, and is thus still accumulating material. Even so, its mass is presently estimated to be five times that of Jupiter.

Following [the first] observations of the system, researchers looked at WISPIT 2, and spotted the planet WISPIT 2b for the first time, using the University of Arizona’s MagAO-X extreme adaptive optics system, a high-contrast exoplanet imager at the Magellan 2 (Clay) Telescope at Las Campanas Observatory in Chile. This technology adds another unique layer to this discovery. The MagAO-X instrument captures direct images, so it didn’t just detect WISPIT 2b, it essentially captured a photograph of the protoplanet.

…In addition to discovering WISPIT 2b, this team spotted a second dot in one of the other dark ring gaps even closer to the star WISPIT 2. This second dot has been identified as another candidate planet that will likely be investigated in future studies of the system.

You can read the paper here [pdf]. The other candidate exoplanet is the bright spot below the star, inside the ring.

The technology of astronomy continues to advance.

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International Astronautical Congress meeting in Australia produces several international agreements

9:40 am

During the International Astronautical Congress meeting that is going on in Sydney, Australia this week, a number of countries have signed agreements calling for a variety of partnerships.

None of the agreements appear to include any significant new projects. All suggest a desire to work together to foster development in their commercial space industries. The number of agreements with Australia is a reflection of the conference’s location in Sidney.

The most amusing agreement is the last, between the UK and Australia. The governments of both of these Commonwealth nations have had serious problems with red tape that have hindered commercial development, especially in the UK. The agreement expands a UK government grant program worth about $9 million so that Australian startups can win grants. It apparently does nothing to ease the red tape in either nation.

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Varda signs deal for more capsule landings in Australia

9:10 am

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

The recoverable capsule company Varda has now signed a new deal that will allow it to land up to 20 more capsules at the commercial spaceport/range Southern Launch in Australia through 2028.

It has already landed capsules there twice. This new contract suggests that Varda has enough expected customers and products to place in its capsules to pay for about six or seven capsules launched per year. If so, this manufacturing model in space is going to bloom very quickly, and will likely become a major profit center for the commercial space stations now under development.

The deal also illustrates the utter failure of the U.S. government’s red tape, especially during the Biden administration.

The company landed its first mission, W-1, at the Utah Test and Training Range in February 2024. But difficulties securing licenses and other approvals for that mission prompted Varda to look elsewhere. “Through that experience, it became pretty clear that the U.S. was not going to be the location for high-cadence reentry operations in the near term,” Eric Lasker, Varda’s chief revenue officer, said at an IAC event announcing the new agreement.

Hopefully the anti-regulatory policies of Trump will change this, but for the moment our government has driven this American company away from the U.S.

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Belgium company joins Starlab space station consortium

8:25 am

Starlab design in 2025
The Starlab design in 2025. Click
for original image.

The Starlab consortium, proposing to build its single-module large Starlab space station that will be launched on Starship, has now added the Belgium company Space Applications Services (SpaceApps) as both a partner and investor.

SpaceApps contributes deep experience in space systems, mission operations and payload integration with capabilities that include avionics, payload development, the end-to-end International Commercial Experiment Cubes (ICECubes) service, as well as mission integration and operations control software. The company also works closely with the European Space Agency and international partners, broadening Starlab’s access to global markets and research communities.

The Starlab consortium already includes the American companies Voyager Space and Northrop Grumman and the European company Airbus. It also has a partnership agreement with the European Space Agency. This new Belgium partnership further cements its place as Europe’s potential future space station after ISS is retired.

This deal is only one of several news stories in the past week signaling progress by this consortium. It has signed the American company Vivace to build the station’s main structure and its partner Northrop Grumman has successfully tested the rendezvous and docking technology its Cygnus cargo capsule will use to dock with Starlab. All in all this station appears to be assembling the pieces its needs.

Below is my updated rankings of the four commercial stations under development:
» Read more

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Axiom successfully tests two of its lunar spacesuits underwater

8:01 am

Axiom's two spacesuits being tested underwater
Axiom’s two spacesuits being tested underwater.
Click for original.

The space station startup Axiom this week successfully completed underwater testing of two of its lunar spacesuits, making them ready for astronaut training.

Axiom won the contract to build these suits for NASA in 2022. It speaks well of the company that only three years later the suits are now ready for use. It also shows NASA’s own incompetence, because before it awarded this contract to Axiom the agency tried to build its own suits, spending more than a billion dollars and fourteen years to produce nothing.

Furthermore, this success underlines yesterday’s NASA inspector general report that lambasted Collins Aerospace’s incompetence in maintaining the spacesuits on ISS. Collins in 2022 had won a similar spacesuit contract to build new space station suits, but two years later backed out of the deal, unable to get the job done.

For Axiom, this spacesuit success adds an essential component to its own space station plans. Though these suits are intended for the Moon, the company now has the basics down for its own space station suit. It owns this suit design, and will not only sell suits to NASA, it can market the suits to any one else.

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September 30, 2025 Quick space links

3:01 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.

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Inspector General: The state of NASA’s spacesuits on ISS is becoming critical

1:28 pm

NASA's failed spacesuit
NASA’s failed Moon spacesuits

A new NASA inspector report issued today [pdf] has found that the single contractor NASA uses to maintain the spacesuits on ISS, Collins Aerospace, has increasingly been unable to do the job, and NASA has no alternative contractor to turn to. From the report’s executive summary:

We previously reported on NASA’s spacesuit management in 2017 and 2021, finding that the Agency faced a wide array of risks to sustaining the EMUs [the spacesuits], including design inadequacies, health risks, and low inventories of spacesuit life support systems, ultimately leading to NASA’s efforts to design and develop next-generation suits to replace the existing EMUs. Specifically, the EMU design flaws have increased the chance of and led to unexpected water in helmets, thermal regulation malfunctions, and astronaut injuries. Given that spacesuits are necessary to meet future ISS maintenance needs until its planned decommissioning in 2030, it is critical that NASA effectively manages the contract performance and subsequent safety risks associated with ESOC [the contract with Collins].

…Until the ISS’s planned decommission at the end of the decade, NASA will continue to require spacewalking capabilities to perform upgrades and corrective and preventative maintenance to the Station. However, Collins’ performance on ESOC increases programmatic risks to NASA as it attempts to conduct safe spacewalks outside the ISS and maintain critical EMU life support component inventories. The contractor is experiencing considerable schedule delays, cost overruns, and quality issues that significantly increase the risk to maintaining NASA’s spacewalking capability.

Collins was awarded this five-year cost-plus maintenance contract in 2010 for $324 million. Since then NASA has been repeatedly extending it, so that it now runs through 2027 and has funneled $1.4 billion into Collins’ bank account. Yet Collins has repeatedly failed to deliver necessary repair parts, even as there have been more frequent problems on ISS, including several cases where spacewalks had to be aborted because an astronaut’s life was in danger. Here are just a few examples cited in the report:
» Read more

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Next Starship/Superheavy test set for October 13, 2025

8:59 am

The planned return trajectories for both Superheavy and Starship
The planned return trajectories for both
Superheavy and Starship on future tests

In an update posted yesterday on SpaceX’s website, the company revealed that it is targeting October 13, 2025 for the eleventh orbital test flight of its Starship/Superheavy rocket.

The update also provided details about the company will test during this flight, including the reuse of a second Superheavy booster.

The booster on this flight test previously flew on Flight 8 and will launch with 24 flight-proven Raptor engines. Its primary test objective will be demonstrating a unique landing burn engine configuration planned to be used on the next generation Super Heavy. It will attempt this while on a trajectory to an offshore landing point in the Gulf of America and will not return to the launch site for catch.

Upon return the booster will start off by firing thirteen engines, the five, and finally three just before landing, to test refinements to its return to Earth.

Starship meanwhile will mostly repeat with variations the test program from flight 10, including the deployment of dummy Starlink satellites, the relight of one of its Raptor engines, and the testing of different thermal protection systems. It will once again fly a low orbital path that will bring it down in the Indian Ocean, either under control or not. This Starship prototype is the last of version two, so there are a limited number of things it can test.

Beginning with the 12th test flight, the company will begin flying version 3, and will likely quickly move to full orbital flights and a chopstick catch of Starship at Boca Chica, as shown by the flight paths in the graphic to the right.

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Firefly loses first stage for next launch when it explodes during static fire test

8:40 am

During a static fire engine test yesterday in preparation for launch, the rocket startup Firefly lost the first stage when an explosion occurred at what appeared to be the base of the rocket. From the company’s update:

During testing at Firefly’s facility in Briggs, Texas, the first stage of Firefly’s Alpha Flight 7 rocket experienced an event that resulted in a loss of the stage. Proper safety protocols were followed, and all personnel are safe. The company is assessing the impact to its stage test stand, and no other facilities were impacted.

Video of the explosion can be seen here.

This incident will obviously delay the next launch, which had only just been scheduled following the completion of the company’s investigation into its launch failure in April. This explosion also suggests there remain serious issues with the Alpha rocket, which has only had two full successes in six launch attempts.

At the same time, with the successful soft landing of its Blue Ghost lander on the Moon earlier this year, Firefly has demonstrated its engineering can be sound and robust. It just appears that a lot more work needs to be done to get Alpha into shape.

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