Tag: engineering

Air Force issues draft approval of second SpaceX launchpad at Vandenberg

9:44 am

Air Force last week issued a draft environmental impact statement approving SpaceX’s plans to rebuild the old Space Launch Complex 6 (SLC-6, pronounced “slick-six”) at Vandenberg that was first built for the space shuttle (but never used) and later adapted for ULA’s Delta family of rockets, now retired.

The plan involves rebuilding SLC-6 to accommodate both Falcon 9 and Falcon Heavy launches, including the addition of two landing pads. With its already operational launchpad at Vandenberg, SLC-4E, the company hopes to increase its annual launch rate from 50 (approved by the FAA earlier this month) to as much as 100.

The estimated launch cadence between SpaceX’s existing West Coast pad at … SLC-4E and SLC-6 would be a 70-11 split for Falcon 9 rockets in 2026 with one Falcon Heavy at SLC-6 for a total of 82 launches. That would increase to a 70-25 Falcon 9 split in 2027 and 2028 with an estimated five Falcon Heavy launches in each of those years.

The draft assessment is now open to public comment through July 7, 2025, with a final version expected to be approved in the fall. It appears the Air Force wants it approved, as it needs this capacity for its own launch requirements. It also appears it no longer cares what the California Coastal Commission thinks about such things, as it has no authority and its members appear motivated not by environmental concerns but a simple hatred of Elon Musk.

An annual launch rate of 100 however exceeds what the FAA approved in May, doubling it. In order to move forward either the FAA will have to issue a new reassessment of its own, or some legislative or executive action will be needed to reduce this red tape. Since Vandenberg is a military base, the military in the end makes all the final decisions. The FAA simply rubber-stamps those decisions.

One comment

China launches communications satellite

9:17 am

China today successfully placed a communications satellite into orbit, its Long March 7A rocket lifting off from this coastal Wenchang spaceport.

SpaceX was supposed to have launched a set of Starlink satellites last night as well, but scrubbed the launch about two and a half minutes before launch. It plans to try again tonight.

The leaders in the 2025 launch race:

59 SpaceX
29 China
6 Rocket Lab
5 Russia

SpaceX still leads the rest of the world in successful launches, 59 to 47.

Leave a comment

New research suggests the two types of streaks on Mars are caused by dry events

9:35 am

A Martian slope streak caused by a dust devil?
A Martian slope streak caused by a dust devil? From
data taken in 2023. Click for original image.

Scientists using a computer machine learning algorithm to assembly and analyze global maps of all known slope streaks and recurring slope lineae (RSL) — the two different types of streaks found on Mars whose cause as yet remain unexplained — have concluded that these streaks are likely caused by dry processes, not wet brine seeping from underground.

Slope streaks can occur randomly throughout the year, can be bright or dark, can occur anywhere, and fade with time. Recurring slope lineae instead appear seasonally in the same locations and are always dark.

You can read the published paper here. It essentially provides further details on research that was first announced at a conference in March. From its conclusion:

[O]ur observations suggest that slope streak and RSL formation may be predominantly controlled by two independent, dry drivers, 1) the seasonal delivery of dust onto topographic inclines, and 2) the spontaneous activation of accumulated dust by energetic triggers – wind and impacts for slope streaks, as well as dust devils and rockfalls for RSL.

…Our results underline the fundamental differences between slope streaks and RSL, despite their visual resemblance. Streak and RSL populations occur on opposite hemispheres (north vs south), at different topographic elevations (mostly lowlands vs mostly highlands), in opposite thermal inertia terrain (low vs high), in different wind speed regimes (above-average vs below-average), in dissimilar diurnal thermal amplitude and heat flux terrain (above-average vs average), in different WEH, H2O, H, and water vapor column terrain (average vs below-average), and in terrain that provides suitable (theoretical) conditions for liquid water at different seasons (Ls ~90° vs Ls ~ 270°).

This data suggests both types of streaks form in connection with very fine Martian dust, but the researchers also admit that the actual method in which these avalanche-type streaks form remains unclear. In both cases the streaks cause no change in the topography (sometimes even traveling uphill for short distances), produce no debris piles at their base, as avalanches typically do, and do not appear to have an obvious cause or source at the top of the streak.

Leave a comment

Ispace borrows $35 million

9:01 am

Ispace landing map
Resilience’s landing zone in Mare Frigoris

The Japanese lunar lander startup Ispace announced last week that it has obtained a new bank loan totaling $35 million from the Japanese bank Mizuho to help pay its ongoing expenses as its Resilience lunar lander attempts the company’s second try at soft landing on the Moon.

The loan is intended to secure working capital for development of mission and other related expenses. Through this financing, ispace intends to strengthen the company’s liquidity position and stabilize its financial foundation, thereby enabling agile management decisions.

In other words, the company had started to run short of cash, and needed this loan to keep operating. It had previously gotten a government loan of almost $6 million, but that did not have to be paid back for ten years. Back in 2018 it raised $90 million in investment capital, followed by an additional $53 million in 2024.

This loan suggests that Ispace might be in serious financial trouble if Resilience fails to soft land on June 5, 2025, as presently planned. The company already has two future lander contracts, one with NASA and one with Japan’s space agency JAXA, but a second failure now might cause those agencies to have second thoughts.

Leave a comment

Chinese pseudo-company completes another launch from sea platform

8:42 am

The Chinese pseudo-company Galactic Energy today successfully placed four communications satellites into orbit, its solid-fueled Ceres-1 rocket lifting off from a sea platform off the eastern coast of China.

To prove how pseudo this company is, China’s state run press did not even mention its existence in the report at the link. The solid fuel of the rocket tells us that it was derived from missile technology, and there isn’t a chance in hell that a private independent company in China could do so without the strict supervision and control from that country’s government.

Nonetheless, this was its 19th successful launch, and its fifth from a sea platform. The rocket has only failed once since since its first launch in 2020.

The leaders in the 2025 launch race:

59 SpaceX
28 China
6 Rocket Lab
5 Russia

SpaceX still leads the rest of the world in successful launches, 59 to 46.

2 comments

Third stage of India’s PSLV rocket fails during launch

9:36 pm

India’s PSLV rocket today (May 18 in India) experienced a launch failure in attempting to place an Earth observation satellite into orbit, with the failure occurring during the engine firing of the rocket’s third stage.

The link is cued to just before the tracking screen began showing the third stage drop from its planned trajectory. The suddenness of the loss of data as well as the drop in the trajectory suggests the engine exploded during firing, but that is pure speculation. Regardless, the launch, only the second India has attempted in 2025, was a failure.

Moreover, the first launch this year was a failure also, though the GSLV rocket in that launch performed as expected and deployed the satellite in its planned transfer orbit. At that point however the Indian-built satellite’s thrusters failed to operate, stranding the satellite in the wrong orbit , which soon decayed. UPDATE: According to a more recent report, it has remained in orbit but provides little service.

Thus 2025, which ISRO had predicted to be India’s most active year ever, is so far not turning out so well. ISRO hopes to begin launching its first unmanned test flights of its Gaganyaan capsule later this year, using its Heavy Lift Vehicle Mark 3 rocket (HLV-M3), an upgraded version of its GSLV rocket. One wonders if these issues will impact that schedule.

These failures by the space agency could however help the Modi government shift the balance of power away from ISRO and to its emerging private rocket sector. If the agency can’t get it done, maybe the private sector should be given the chance to do it. For example, the government has been pushing to have the ownership and management of the PSLV rocket transferred from ISRO to a private rocket company since in 2016. In the nine year since, there however has been little sign of this shift happening.

Part of the problem has been that none of India’s private rocket startups are really ready to take over these operations. The transfer is further made less likely by the strong resistance to change within ISRO’s bureaucracy. These failures provide political ammunition to push back against that resistance.

One comment

Two launches last night, by China and Rocket Lab

10:23 am

The high pace of rocket launches this year continued last night, but in a rare exception this time it had nothing to do with SpaceX.

First, the Chinese pseudo-company Landspace successfully placed six radar satellites into orbit, its upgraded version of its Zhuque-2 rocket lifting off from the Jiuquan spaceport in China’s northwest.

No word on where the rocket’s lower stages crashed inside China. Unlike its larger Zhuque-3 rocket, which has not yet flown but is being designed as a copy of a Falcon 9 with its first stage able to return to Earth vertically, the Zhuque-2 has no such ability.

Next, Rocket Lab successfully placed a commercial radar satellite into orbit, its Electron rocket lifting off from one of the company’s two launchpads in New Zealand. This launch was the third by Rocket Lab for the satellite company iQPS, and is the second in an eight-satellite launch contract with the company.

The leaders in the 2025 launch race:

59 SpaceX
27 China
6 Rocket Lab
5 Russia

SpaceX still leads the rest of the world in successful launches, 59 to 45.

5 comments

What satellite did the Varda capsule fly past during its return last week?

10:01 am

Other satellite passing under Varda's capsule
Click for video cued to this point.

Regular reader Rex Ridenoure emailed me today to note that there appears to be another satellite relatively nearby and visible in the video posted in yesterday’s quick links, taken from inside Varda’s capsule during its return to Earth.

The image to the right is a screen capture taken at 7:56 of the video. At that point the object is visible from 7:50 to 8:01 to the west and below. You can clearly see it moving from left to right (east to west). The two solar panels can also be discerned on either side of the satellite’s main body.

It later reappears for only two seconds in the lower right of the view window at 9:18, then is visible again at 10:30 to 10:33, now beginning to pass below but considerably to the north (?).

If anyone has the resources to identify this satellite, as well as its exact distance during this close approach, please comment below. It raises an interesting question on whether its existence was considered when the re-entry time was decided.

6 comments

Astronomers detect evidence of numerous protoplanetary disks in three molecular clouds near the galactic center

11:58 am

Using the ground-based ALMA telescope in Chile, astronomers have detected evidence of the existence of numerous protoplanetary disks in three molecular clouds near the galactic center.

The findings suggest that over three hundred such systems may already be forming within just these three CMZ clouds [Central Molecular Zone]. “It is exciting that we are detecting possible candidates for protoplanetary disks in the Galactic Centre. The conditions there are very different from our neighbourhood, and this may give us a chance to study planet formation in this extreme environment,” said Professor Peter Schilke at the University of Cologne.

You can read the paper here.

These results once again suggest that the formation of stars, solar systems, and planets is more ubiquitous than ever expected, that they can all form in very extreme and hostile environments, of which the center of the Milky Way is one of the most hostile.

And if planets can form here, they can likely form everywhere else. This increases the likelihood of many planets throughout the galaxy capable of supporting the development of life.

Leave a comment

FAA issues revised launch window and flight restrictions for future Starship test flights

11:00 am

Flight path for Starship's ninth test flight

Due to the breakup of Starship over the Atlantic during its last two test flights, the FAA today issued [pdf] revised launch window and flight plan restrictions for future flights, in an attempt to placate somewhat the concerns of the United Kingdom.

The map to the right, taken from the FAA assessment, shows in red the area where air traffic is impacted by the next Starship/Superheavy launch, now tentatively planned for next week. Note how the path threads a line avoiding almost all land masses, thus limiting the worst impact to just the Bahamas, the Turks & Caicos Islands. Though the launch will effect 175 flights and require one airport on these islands to close during the launch window, to minimize the impact the FAA has required that the launch window be scheduled outside peak travel periods.

At the same time, the FAA after discussions with the governments on these islands has approved this flight plan, noting that “no significant impacts would occur” due to the ninth flight.

The agency has not yet actually issued the launch license, but it will almost certainly do so in time for SpaceX’s planned launch date. Since the advent of the Trump administration the FAA has no longer been slow walking these approvals in order to retype the results of SpaceX’s investigation. Instead, as soon as SpaceX states it has satisfactorily completed its investigation, the FAA has accepted that declaration and issued a launch license. Expect the same this time as well.

2 comments

Kazakhstan denies rumors that Russia plans to abandon Baikonur

10:01 am

In response to reports in its local press that Russia was going to pull out of the Baikonur spaceport in the next three years, two decades before its lease expires in 2050, the Kazakhstan government yesterday issued a denial.

Local media in Kazakhstan have reported that Russia could exit the lease between 2026 and 2028 as it pulls back from international space cooperation, including a planned withdrawal from the International Space Station (ISS) as early as 2028.

“The question of early termination of the lease, or transfer of the city of Baikonur to the full control of the Kazakh side, is not being considered at this time,” Kazakhstan’s Aerospace Committee told AFP.

There rumors however could have real merit. Once ISS is retired, the Russians will have little reason to use Baikonur. It is almost certain it will not have launched its own replacement station by then, and Baikonur’s high latitude location will make its use with any other station difficult if not impossible. Moreover, the effort to switch to its Angara rocket favors launches from the Vostochny and Plesetsk spaceports, both of which have launchpads built for that rocket.

Finally, Russia has not had the cash to upgrade the launchpads at Baikonur, so much so that it has often been late paying Kazakhstan its annual $115 million rental fee, delays which at one point caused Kazakhstan to seize the launchpad Russia was upgrading for its proposed new Soyuz-5 rocket.

In fact, Russia might not be able to afford Baikonur at all, based on its present finances and the cost of its stupid war in the Ukraine.

We shall not get clarity on this story for at least a year or so, but stay tuned. Nothing is certain.

12 comments

Premature fairing release cancels first launch of Gilmour’s Eris rocket

9:43 am

The Australian rocket startup has canceled any attempt to launch its Eris rocket during its present launch window as a result of the premature fairing release that occurred during the countdown yesterday.

Last night, during final checks, an unexpected issue triggered the rocket’s payload fairing. No fuel was loaded, no one was hurt, and early inspections show no damage to the rocket or pad.

While investigating the cause of this incident, the company will ship and install a replacement fairing from its factory. A new launch date will be announced after these actions are completed. Expect a delay of at least two months, likely more.

2 comments

SpaceX launches 26 Starlink satellites

9:34 am

SpaceX this morning successfully placed another 26 Starlink satellites into orbit, its Falcon 9 rocket lifting off from Vandenberg in California.

The first stage completed its second flight, landing on a drone ship in the Pacific, and doing so only 39 days after its first flight.

The leaders in the 2025 launch race:

59 SpaceX
26 China
5 Rocket Lab
5 Russia

SpaceX now leads the rest of the world in successful launches, 59 to 43.

One comment

Curiosity looks uphill at boxwork and future travels

11:06 am

Curiosity's view uphill
Click for original image.

Overview map
Click for interactive map.

Cool image time! The panorama above, taken on May 14, 2025 by the left navigation camera on the Mars rover Curiosity, takes a look uphill at the canyon that the rover is now entering.

The overview map to the right gives the context. The blue dot marks the rover’s location when the picture was taken, and the yellow lines indicate approximately the view of the panorama above. If you look closely at the ground at the base of the cliff on the right, you can see the boxwork ridges indicated on the overview map.

The red dotted line marks the original planned route of the rover. The science team abandoned that plan several months ago in order to get to the boxwork geology as quickly as possible. It expects to reach that boxwork sometime in the next month or so.

Based on the proposed route posted in September 2023, after the scientists have completed their observations of the boxwork the rover will continue uphill within this canyon, bearing east as it parallels that 100-foot-high cliff seen on the horizon. The green dotted line indicates roughly that future route.

Leave a comment

Gilmour scrubs launch attempt today

9:51 am

The Australian rocket startup Gilmour Space has scrubbed its first attempt to launch its Eris rocket from its own Bowen spaceport on the eastern coast of Australia.

Our team identified an issue in the ground support system during overnight checks. We’re now in an extended hold to work through it. Our next target is the Friday morning launch window.

The company has a two week launch window extending through the end of the month. If it can’t launch in that window then it will try again in the second half of June, assuming the bureaucracy of the Australian Space Agency issues a revised licence. It took that government three years to issue this license, so assuming it will work quickly to issue a revision is a dangerous thing.

The company is not providing a live stream of the launch, though it has said it will release a full video after the fact.

3 comments

Axiom’s next commercial manned flight to ISS delayed at least one week

9:06 am

NASA and Axiom have delayed the launch of the company’s fourth commercial manned flight to ISS by at least a week, from May 29 to June 8, at the earliest.

The NASA press announcement was decidedly vague about the reason:

After reviewing the International Space Station flight schedule, NASA and its partners are shifting launch opportunities for several upcoming missions. The schedule adjustments provide more time to finalize mission plans, spacecraft readiness, and logistics.

This report speculates that SpaceX might have had additional issues getting its brand new manned Dragon capsule ready on time, without out any clear evidence. The capsule has taken longer to build than originally predicted, but giving SpaceX one extra week seems insufficient if the capsule had some outstanding technical issues.

More likely it is exactly as NASA states, the delay is to accommodate the complex coming and going of vehicles to ISS.

The mission will launch one Axiom command pilot and three passengers, government astronauts from India, Poland, and Hungary.

This new manned Dragon, as yet unnamed, will bring SpaceX’s fleet of manned capsules to five, assuming it does not retire one of the older capsules. The company will thus have the largest manned spacecraft fleet ever, exceeding NASA’s four shuttle fleet that existed in the 1990s.

Leave a comment

Engineers reactivate thrusters on Voyager-1 that have been out of commission since 2004

11:58 am

The Voyager missions
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.

7 comments

Astronomers observe cloud changes above the northern polar lakes of Titan

10:15 am

Changes seen in Titan's atmosphere
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.

Leave a comment

China and SpaceX complete launches

9:58 am

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.

Leave a comment

AST SpaceMobile: It will be launching satellites almost monthly in the second half of ’25

9:42 am

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.

Leave a comment

Varda’s third capsule returns to Earth, completing hypersonic test for Air Force

9:24 am

Varda's third capsule, on the ground in Australia
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.

3 comments

Starlink gets approvals to operate in Saudi Arabia, Scotland, and Bangledesh

12:08 am

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.

11 comments

The global distribution of dust devils on Mars

4:13 pm

Global map 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.

3 comments

Scientists: Martian gullies formed by CO2 frost, not water flows

3:49 pm

Frost on Martian hillside
Dry ice frost on Martian cliffs. From a 2020 post.
Click for full image.

A new analysis of the gullies found on cliffs on Mars, usually on the interior rims of craters, has concluded that carbon dioxide frost is the cause of the erosion, not ancient flows of water.

This conclusion eliminates the need for liquid flowing water in the Martian past, at least in conjunction with gullies. From the paper’s conclusion:

These results show that CO2 frost is capable of producing Martian gully morphologies. Since flows powered by this process are known to be ongoing and capable of transporting the necessary volume of material, it is the simplest explanation for their formation. Variations in the frequency and fluidity of flows could have occurred over time due to variations in the CO2 cycle. CO2-driven gully formation would indicate that there was not necessarily regular, recurring meltwater during high-obliquity periods. This removes a constraint on recent climate, and also addresses a paradox: if obliquity regularly exceeds the current value as generally thought, and if gullies formed via snow melting at high obliquity, the Late Amazonian Epoch should have included regular snowmelt and widespread aqueous processes. Gully formation by CO2 frost processes is consistent with a cold-desert Late Amazonian with rare or small amounts of liquid water and little aqueous weathering, consistent with the observed mineralogy.

…Gullies, one of the most-discussed lines of evidence for liquid water on Mars, may in fact have no direct connection to H2O. CO2 frost-fluidized gully formation also has broader implications for geomorphology, widening an emerging field of new landform types and processes without Earth analogs. Similar processes could occur on other worlds with erodible substrates on steep slopes and volatile ices at their frost point, although we currently lack the high-resolution images needed to test this hypothesis. Such ices include N2 on Pluto and Triton, and SO2 on Io. [emphasis mine]

In other words, though the gullies appear at first glance to our Earth eyes to have been caused by water flowing downhill, in fact the data now suggests the annual CO2 frost cycle of Mars is the prime cause, even in the distant past. No surface water was required. And since no one has yet come up with a good model for liquid surface water even existing in the Martian past (the atmosphere being too cold and thin), this conclusion helps eliminate this conflict.

The paper also notes the lack of water likely eliminates the need for any planetary protection efforts at these gullies, as the lack of water makes the likelihood of any microbiology nil.

As these conclusions are based on lab work and analysis of images, there remains great uncertainty. Nonetheless, the results help reinforce the arguments that the geological features we see on Mars were formed not by flowing liquid water but by other processes, such as glaciers of ice.

4 comments

Gilmour finally gets launch license from Australian bureaucrats

11:37 am

Australian commercial spaceports
Australia’s commercial spaceports. Click for original map.

After several years of delays, the Australian rocket startup Gilmour Space today announced that it has finally been issued a launch license from the Australian Space Agency.

According to the company, “pending weather & final system checks, we’re on target for our launch window to open NET May 15.”

The launch will take place at Gilmour’s own Bowen spaceport on the east coast of Australia. The Eris rocket has three stages and is designed to launch smallsats similar to Rocket Lab’s Electron rocket.

It is amazing this company hasn’t gone bankrupt waiting for this launch license. It applied in 2022, hoping to launch that year. Three years later it finally gets the okay. The amount of cash it had to burn unnecessarily in those years would generally destroy most startups.

Whether the red tape in Australia will clear up in the future is decidedly unknown, especially with the election victory this month of the leftist party.

Hat tip BtB’s stringer Jay.

Leave a comment

China launches communications test satellite

9:53 am

China early this morning successfully launched another communications test satellite. its Long March 3C rocket lifting off from its Xichang spaceport in southwest China.

China’s state-run press as always released little information. All we really know is that this launch has been part of a series of recent launches putting similar communications test satellites into orbit. We also don’t know where the rocket’s lower stages, which use very toxic hypergolic fuels, crashed inside China.

The leaders in the 2025 launch race:

57 SpaceX
25 China
5 Rocket Lab
5 Russia

SpaceX still leads the rest of the world in successful launches, 57 to 42.

Leave a comment

Lockheed Martin invests in new solid-fueled rocket startup

9:36 am

In its most recent fund-raising round, the solid-fueled rocket startup X-Bow (pronounced “crossbow”) raised $35 million in private investment capital, with Lockheed Martin being the largest investor.

Lockheed Martin’s involvement marks a deepening interest in securing alternative sources for solid rocket motors, components that are increasingly vital to a wide range of U.S. missile systems, including hypersonic weapons. The investment comes three years after Lockheed’s attempt to acquire Aerojet Rocketdyne was blocked by the Federal Trade Commission on antitrust grounds. Aerojet was later bought by L3Harris Technologies, leaving Lockheed without a vertically integrated propulsion supplier.

Nor is this the first time that Lockheed Martin has invested in a rocket startup. It had previously invested in ABL and Orbex, both liquid-fueled but struggling or failing, as well as the much more successful Rocket Lab. It has also invested in the orbital tug startup Orbit Fab, the orbital capsule company Inversion Space, and the satellite startup Terran Orbital, which it ended up buying entirely.

All in all, Lockheed Martin appears determined to join the new wave of space startups, if not by doing it itself but by buying into the successes of new startups. So far this has not entirely paid off, but it does appear to be, in the long term, a viable strategy to keep Lockheed Martin competitive and in the game.

2 comments

NASA engineers end second super pressure balloon flight early

9:23 am

Flight path of second super pressure balloon test
Flight path of second super pressure balloon test

Due to an issue with its power system, NASA engineers today decided to end its second super pressure balloon flight this year after only nine days, when the balloon crossed over South America and thus allowing them to recover it safely.

Although the balloon performed well and the mission successfully met its minimum requirements toward qualification of the balloon system, an issue with the power system aboard the balloon gondola prompted the team to terminate the mission early as a precaution. The team had been monitoring a power failure in one of the redundant charging systems since May 8.  “Despite the loss of one of the redundant charging systems, the remaining power system was performing very well and still able to sustain the batteries and electrical equipment over the course of the mission,” said Hamilton. “However, to be cautious, the team opted to end the flight early to get the equipment back, so we can do a full failure analysis.” 

After identifying a safe area and coordinating with Argentinian officials, the flight was safely terminated. Recovery of the balloon and payload is in progress. 

The first flight flew for seventeen days, circling the globe at the high southern latitudes. In that case issues with the balloon caused the flight to be terminated while it was over the ocean, preventing recovery. As the goal with both flights was to fly for 100 days, neither came close to that target.

Leave a comment

NASA releases thermal image of Mars taken by Europa Clipper

9:11 am

Mars as seen by Europa Clipper in thermal
Click for original image.

NASA yesterday released a thermal image of Mars taken by during Europa Clipper’s March 1, 2025 fly-by of the red planet on its way to Jupiter. From the caption:

This picture of Mars is a composite of several images captured by Europa Clipper’s thermal imager on March 1. Bright regions are relatively warm, with temperatures of about 32 degrees Fahrenheit (0 degrees Celsius). Darker areas are colder. The darkest region at the top is the northern polar cap and is about minus 190 F (minus 125 C).

The press release doesn’t identify the bullseye feature on the left. I think the bright area inside the bullseye might be the shield volcano Syrtis Major, with the dark area to the right Isidis Basin, which means this is also a snapshot of Perseverance, sitting on the basin’s western perimeter. The dark feature on the right edge of the image might be the giant volcano Elysium Mons. These however are total guesses and likely wrong.

The mission team used this fly-by to test the spacecraft’s science instruments, and have so far found all to be working as expected.

Europa Clipper will do one more fly-by of Earth in December 2026, allowing it to reach Jupiter in April 2030.

Leave a comment
1 2 3 4 5 6 … 502