May 14, 2025 Zimmerman/Batchelor podcast
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Author: Robert Zimmerman
Kabardinka Ensemble – Dance of the Black Sea Circassians
An evening pause: From the webpage:
A collection of various Circassian dance figures and influenced by the Western Adyghe tribes Ubykh, Natukhay and Shapsug who once used to populate the Black Sea coasts of the Northwest Caucasus for thousands of years with their Abkhazian cousins before they were completely exiled from the region by Russian Empire in 1864.
The solo dances are especially hypnotic. There are also many elements that resemble Irish dance.
Hat tip Judd Clark.
May 14, 2025 Quick space links
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.
- New rocket startup HStar Space proposes its own heavy-lift reusable rocket
It wants to launch from French Guiana, Wallops, and Australia. This is a very new company, so our expectations should at this point be very skeptical.
- Firefly touts its composite dome for the tanks on its
Alpha rocketplanned medium launch rocket as well as its first stage for Northrop Grumman’s Antares rocket.
Corrected as per my reader Dick Eagleson below. Thank you.
- The New Horizons team notes that the spacecraft continues to detect “high dust impact rates” as it flies outward beyond Pluto in the Kuiper belt
This was first reported in Feburary 2024, but the continuing high impact rate suggests the Kuiper Belt has more in it than predicted.
- On this day in 1973 the last Saturn 5 rocket launched, carrying the first American space station, Skylab, into orbit
Three crews in 1973 occupied the station, for 28, 59, and 84 days respectively. The first mission however had to do major improvised repairs to make the next two missions possible, because during launch a heat shield on the hull ripped off, destroying one solar panel and preventing a second from deploying. Astronauts on that first mission, led by Apollo astronaut Pete Conrad, had to install a new umbrella shield to control the station’s internal temperature, and during a spacewalk released the remaining solar panel. More details in Leaving Earth.
Engineers reactivate thrusters on Voyager-1 that have been out of commission since 2004
The routes the Voyager spacecraft have
taken since launch. Not to scale.
Because of an anticipated pause in communications due to upgrade work on the antennas of NASA’s Deep Space Network — used to communicate with interplanetary missions — the engineers operating the two Voyager spacecraft that are now in interstellar space after almost a half century of travel have improvised a repair that reactivated thrusters on Voyager-1 that were deemed inoperable in 2004.
Since then the spacecraft had been dependent solely on its backup thrusters. The engineers wanted the spacecraft to have two sets of thrusters again in case something went wrong during that pause in communications, running from May 2025 to February 2026.
The repair required getting two heaters switched back on, and carried with it the risk of an explosion that would destroy Voyager-1. The command to reactivate the heaters was sent on March 20, 2025, and two days later (after the command traveled at the speed of light for 23 hours to reach Voyager-1 and then 23 hours to return) the spacecraft signaled that all was well and that the heaters and thrusters were now working again.
Both Voyagers are expected to run out of power sometime in the next two years. The goal now is try to make both last at least until 2027, so that they will mark a full half century of operation since their launch in 1977.
SpaceX committing millions to develop the town of Starbase at Boca Chica
Even though the newly minted town of Starbase at Boca Chica is essentially a “company town,” with almost all its residents employees of SpaceX, the company is not treating the town in a traditional company town manner, which in the past meant the company used its monopoly control to the detriment of its employees.
Instead, it appears SpaceX is committing millions to develop the town of Starbase at Boca Chica into a very classy place to live.
The newly minted Starbase, Texas will soon have a $22 million community center, according to online records from the Texas Department of Licensing and Regulation. The community center is being designed by a Pennsylvania design firm called AE7, and will be located at 41028 Quicksilver Ave. immediately north of a bend in the Rio Grande. It will include a 20,000-square-foot building and pool, with construction aiming to start in June and be completed by June 2026, according to the TDLR records.
…Earlier this year, Starbase officials registered several other community projects with state regulators, including a $20 million school “housing children from infancy to grade 12,” whose construction was set to get underway in April. Other projects include a 2,555-square-foot medical clinic, a $2 million multifamily construction featuring a 111,745-square-foot “new parking garage and multifamily” development at 52163 Memes St.
SpaceX is also building a $100 million office building for its operations. It has also filed plans to create a $13.5 million recreation center and sushi restaurant. Another plan to build a $15 million retail plaza was proposed earlier, but has remained stalled.
Under the leadership of Elon Musk (“the new Hitler” according to the brainless Democratic Party and its media propagandists), the employees of SpaceX at Starbase will be living in an up-to-date modern and very upper middle class environment, comparable to the best suburban communities found anywhere in the United States.
Astronomers observe cloud changes above the northern polar lakes of Titan
Click for full resolution image.
Using data from both ground- and space-based telescopes, astronomers have now observed clouds rising in the thick atmosphere of the Saturn moon Titan.
The team observed Titan in November 2022 and July 2023 using both Keck Observatory and the James Webb Space Telescope. Those observations not only showed clouds in the mid and high northern latitudes on Titan — the hemisphere where it is currently summer — but also showed those clouds apparently rising to higher altitudes over time. While previous studies have observed cloud convection at southern latitudes, this is the first time evidence for such convection has been seen in the north. This is significant because most of Titan’s lakes and seas are located in its northern hemisphere and evaporation from lakes is a major potential methane source. Their total area is similar to that of the Great Lakes in North America.
The image to the right shows these methane clouds, indicated by the arrows, as seen by Webb on July 11, 2023 and then three days later by Keck. The clouds appear to have shifted downward during these observations.
The data suggests we are seeing one small aspect of Titan’s atmospheric methane cycle, where the liquid methane in the lakes evaporates to form clouds, which later than condense to rain back down. Though superficially similar to the water cycle here on Earth, the details suggest it will be very different on Titan.
China and SpaceX complete launches
Two launches so far today. First, China successfully launched the first 12 satellites for proposed orbiting computer constellation dubbed the “Three-Body Computing Constellation,” its Long March 2D rocket lifting off from its Jiuquan spaceport in northwest China.
As is usual for China’s state-run press, it revealed little useful information about this constellation.
Each satellite in this initial batch is equipped with a domestically developed 8-billion-parameter AI model capable of processing satellite data across levels L0 to L4 (with L0 referring to raw data directly collected by the satellite), CGTN learned from the lab. The constellation also supports full inter-satellite connectivity. In addition to AI-powered data processing, the satellites will carry out experimental missions, including cross-orbit laser communication and astronomical science observations.
The press also provided no information about where the rocket’s lower stages, using very toxic hypergolic fuels, crashed inside China.
Next, SpaceX placed another 28 Starlink satellites into orbit, its Falcon 9 rocket lifting off from Cape Canaveral in Florida. The first stage completed its fourth flight, landing on a drone ship in the Atlantic.
The leaders in the 2025 launch race:
58 SpaceX
26 China
5 Rocket Lab
5 Russia
SpaceX still leads the rest of the world in successful launches, 58 to 43.
AST SpaceMobile: It will be launching satellites almost monthly in the second half of ’25
Though it did not state the all the specific rockets the company will use, the satellite-to-cellphone company AST SpaceMobile revealed this week that it plans to launch its BlueBird satellites every month or two beginning in July 2025.
India’s GSLV rocket is slated to carry AST SpaceMobile’s first Block 2 BlueBird satellite, which the operator said is scheduled to ship from its Texas facility in June. At three times the size of each of the five Block 1 BlueBirds launched last year on a SpaceX Falcon 9 rocket, the satellite would surpass its predecessors to become the largest commercial antenna ever deployed in low Earth orbit.
Abel Avellan, AST SpaceMobile founder and CEO, said that from the second or third launch this year, Block 2 BlueBirds would feature in-house developed chips to support peak data rates of up to 120 megabits per second at 10 times the capacity of Block 1. Subsequent launches would also deploy between three and eight Block 2 satellites at a time, depending on the rocket, Avellan told investors during the company’s earnings call.
Avellan did not give an update on other launch missions that would leverage SpaceX’s Falcon 9 and Blue Origin’s New Glenn rockets, whose larger fairings can accommodate up to eight Block 2 satellites per flight.
Whether AST SpaceMobile will be able to fulfill this schedule however is a big question. SpaceX could provide the rockets for all these launches, but the availability of its Falcon 9 rocket might be limited due to other customer contracts as well as its own needs to launch Starlink satellites. Blue Origin’s New Glenn could certainly use the business, but that rocket has only launched once, and the company has been very slow about doing its second launch, now scheduled for later this month. It is very unclear whether it could do more than one of these launches this year.
India’s GSLV rocket could grab the business, but once again it is unclear it has the capacity to do more than two such launches before the end of the year.
All in all, it appears the demand for rocket launches exceeds the supply, a situation that is very good for the launch industry.
Varda’s third capsule returns to Earth, completing hypersonic test for Air Force
Varda’s third capsule, on the ground in Australia.
Click for original image.
The third recoverable capsule for the startup Varda has landed successfully in Australia, completing its commercial orbital mission for the Air Force, which tested a positional sensor intended for use during hypersonic missile flights.
The California-based space manufacturing startup said the capsule, carrying an inertial measurement unit (IMU) developed for the U.S. Air Force by Innovative Scientific Solutions Incorporated (ISSI), touched down at the Koonibba Test Range operated by Southern Launch.
According to company officials, the capsule reentered Earth’s atmosphere at speeds exceeding Mach 25 – more than 25 times the speed of sound. “This extreme environment offers researchers valuable data to enhance hypersonic navigation, expand orbital economy applications, and support U.S. national security objectives in low Earth orbit,” said Dave McFarland, Varda’s vice president of hypersonic and reentry test.
The capsule had been launched on March 14, 2025 on a SpaceX Falcon 9. Of the capsule’s now three flights, two have tested equipment sensors during descent. Only the first did in-space manufacturing, as had been what Varda anticipated would be its primary customer base.
This was also the second return in a row landing in Australia. Initially the company had planned to return the capsules in the U.S., as it did with its first capsule, but the bureaucratic red tape from both the FAA and the military to do that landing was so bad (delaying the capsule’s return by six months) Varda made alternative arrangements in Australia.
Starlink gets approvals to operate in Saudi Arabia, Scotland, and Bangledesh
In the past two days SpaceX’s Starlink constellation for providing internet service globally has obtained approvals from three different countries, widening its use significantly worldwide.
First, Scotland has approved Starlink to begin a six-month trial whereby the constellation will provide internet access on trains operating “between Inverness and Thurso, Wick, Kyle of Lochalsh and Aberdeen.” If successful, the program will be expanded to provide service along other rural train lines in Scotland.
Next the Bangledesh government approved a 90-day waiver allowing Starlink to “supply bandwidth from outside the country.” Normally the regulations in that country require such services to be routed through “local gateways”, which likely refers to local communications companies. This waiver will allow SpaceX to offer Starlink in its normal manner, direct to the customer and outside any already established communications network.
Whether the waiver will be extended further is at present unknown, but I suspect it will be because of public pressure.
Finally, Elon Musk announced that Saudi Arabia has now approved Starlink for “aviation and maritime use” within the country.
All in all, SpaceX continues to vacuum up the world’s internet market simply because none of its competitors have made the effort to compete aggressively. They continue to cede territory to Starlink, without a fight.
The Jubalaires – Noah
An evening pause: Performed live sometime in the 1950s.
Hat tip Cotour.
The global distribution of dust devils on Mars
Click for original image.
Scientists reviewing the dust devil tracks in orbital images produced by Mars Reconnaissance Orbiter (MRO) have now created a global map that also provides insight into the ground conditions that cause the dust devils to form. From the abstract:
In the first global study of these tracks using high-resolution satellite images from 2014 to 2018, we find tracks in 4% of the images, mostly near 60° north and south latitudes. These tracks are more common during local summers, especially in the southern hemisphere, coinciding with the peak of Mars’ dust storm season, when active dust devils are also more common. Surprisingly, dust devil track (DDT) formation does not depend on elevation, indicating it is not related to the ambient atmospheric pressure. Instead, they occur in darker areas where surface dust covers coarser material, which is revealed as the dust devil moves past.
The white dots on the map above, figure 5 of the paper, shows those MRO images where dust devil tracks were seen. The redish-orange regions are where the data suggests more dust devils should occur, while the blue areas of regions of few dust devils.
The map also notes the locations where Spirit, Opportunity, and InSight landed. Opportunity clearly landed in a region that had more dust devil activity, which explains why its solar panels were cleaned off so regularly by wind. Spirit did not land in such a region, but somehow it was lucky in getting wind events that cleared its panels of dust. InSight had no such luck, and having landed in a region with little dust devil activity, its panels steadily became covered with dust, eventually forcing the end of the mission.
As the paper notes, “To maximize mission lifetimes, future solar powered assets should favor regions where we have identified numerous [dust devil tracks] and where many active [dust devils] are present.” This proposal makes sense, for many reasons. For one, it shifts missions to higher latitudes where many glacial and near-surface ice features are found. Up until now the science community has sent all the landers and rovers to the Martian dry tropics, which has no such near surface ice. For future colonies it is imperative we begin studying Mars’ wetter regions.
This study provides another practical reason for doing so.