Tag: spaceflight

Juno gets new close-up images of Jupiter’s moon Io

9:57 am

Io as seen by Juno in July 2023
Click for original image.

During its July close fly-by of Jupiter the orbiter Juno also flew past the moon Io, getting within 14,000 miles. The picture to the right, cropped and reduced to post here, was one of the images taken during that fly-by and subsequently processed and color enhanced by citizen scientist Thomas Thomopoulos.

The picture was taken at about the spacecraft’s closest point. It shows the splotched and volcanic surface of Io, which because it orbits close to Jupiter tidal forces cause it to have an intensely active volcanic surface. All the black features are either volcanoes or lava flows. This set of all of Juno’s Io images taken during the fly-by, enhanced by citizen scientist Gerald Eichstädt, also shows a volcanic plume in the shadowed portion of the planet, just beyond the terminator, which Eichstädt believes is a mountain dubbed Tohil Mons.

Even closer flybys are scheduled for December ’23 and February ’24, both getting within 1,000 miles of the surface.

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Astronomers: Binary system creates tidal waves on star’s surface 3x larger than our own Sun

9:32 am

Tidal waves on star's surface

Based on computer simulations, astronomers believe that the monthly light changes in a binary star system are partly caused by gigantic tidal waves on the surface of the system’s larger star, waves that are three times higher than the diameter of our own Sun.

The larger star in the system is nearly 35 times the mass of the Sun and, together with its smaller companion star, is officially designated MACHO 80.7443.1718 — not because of any stellar brawn, but because the system’s brightness changes were first recorded by the MACHO Project in the 1990s, which sought signs of dark matter in our galaxy.

Most heartbeat stars vary in brightness only by about 0.1%, but MACHO 80.7443.1718 jumped out to astronomers because of its unprecedentedly dramatic brightness swings, up and down by 20%. “We don’t know of any other heartbeat star that varies this wildly,” says MacLeod.

To unravel the mystery, MacLeod created a computer model of MACHO 80.7443.1718. His model captured how the interacting gravity of the two stars generates massive tides in the bigger star. The resulting tidal waves rise to about a fifth of the behemoth star’s radius, which equates to waves about as tall as three Suns stacked on top of each other, or roughly 2.7 million miles high.

The image on the right is a screen capture from the computer simulation. The bulges on the right side of the larger star are the hypothesized tidal waves.

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Update on the development of a new first stage for Northrop Grumman’s Antares rocket

9:01 am

Link here. The first stage of the Antares rocket has previously relied on Russian engines in a Ukrainian-built body. The Ukraine War made getting both impossible, and thus Northrop Grumman hired Firefly to provide it a new first stage, presently targeting mid-2025 for its first flight. In the meantime in order to meet its contractual obligations with NASA, it has hired SpaceX’s Falcon 9 rocket to fly the next three Cygnus freighters to ISS.

The report at the link gets some interesting details about Firefly’s engines and first stage. Both will raise the payload capabilities of Antares, which as yet has failed to garner any commercial payloads outside of Northrop’s own Cygnus capsule. That increase in capability might make it more appealing to commercial satellite companies.

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Chinese pseudo-company Galactic Energy launches seven satellites

8:52 am

China's spaceports
China’s spaceports

One of China’s pseudo-companies, Galactic Energy, yesterday successfully placed seven small satellites into orbit, using its Ceres-1 solid-fueled rocket that lifted off from China’s Jiuquan spaceport in the Gobi Desert.

Considering that a launch two days ago from the Taiyuan spaceport apparently dropped sections of its first stage near habitable areas, I though it worthwhile to post again the map to the right, showing which Chinese spaceports expose China’s inhabitants to risk.

It also appears that even the state-run press of China knows Galactic Energy really isn’t a privately owned commercial company, as it doesn’t even mention the company’s name in its news report at the link. While it gets investment capital and functions kind of like a private company, everything it does is supervised by the Chinese government, which can take full control of the company whenever it wants. Moreover, the technology of its solid-fueled rocket was derived entirely from military technology, which means the Chinese government supervised its development every step of the way.

The leaders in the 2023 launch race:

54 SpaceX
33 China
10 Russia
6 Rocket Lab
6 India

American private enterprise still leads China in successful launches 62 to 33, and the entire world combined 62 to 54, while SpaceX by itself is now tied the world (excluding American companies) 54 to 54.

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Martian craters or volcanoes?

11:52 am

Martian craters or volcanoes?
Click for original image.

Cool image time! The picture to the right, cropped and reduced to post here, was taken on June 30, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The scientists label these features “cones” because many of the depressions sit on top of a mound or hill, suggesting some form of volcanic feature, either from erupting lava, ice, or mud.

Yet, are they volcanoes? Some or even many could instead be impact craters, created when a asteroid broke up during infall, creating a spray of bolides. Erosion of surrounding terrain can create what scientists call pedestal craters, but if all these craters were from an impact than all would either be pedestal craters, or not. Instead, we have a mix of some craters above and others level with the terrain.
» Read more

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Ingenuity snaps picture of Perseverance during 54th flight

10:13 am

Perseverance as seen by Ingenuity on August 8th
Click for original image.

During Ingenuity’s 54th flight, a short vertical hop sixteen feet up and down that lasted only 25 seconds, the helicopter’s color camera managed to get a picture of the rover Perseverance, only about 200 feet away to the north.

That picture, cropped and enhanced to post here, is to the right. It shows Perseverance just inside the picture’s upper edge. Its graininess illustrates in a sense the engineering test nature of Ingenuity. It was never expected to last this long and to take actual scouting or science imagery. It was supposed to complete a 30 day program of a handful of test flights, proving it was possible to fly in Mars’ very thin atmosphere (1/1000th that of Earth). Instead, it has lasted years, and completed 54 flights, keeping ahead of Perseverance and providing the rover team scouting images of the ground they wish to travel.

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South Korea’s KARI space agency releases new images taken by its Danuri lunar orbiter

10:02 am

To celebrate the anniversary of its launch, South Korea’s KARI space agency today released new images taken by its Danuri lunar orbiter.

Images include views of Reiner Gamma, a so-called swirl, which features a localized magnetic field and marks a bright spot within the Oceanus Procellarum region. Another shows shadows inside Amundsen Crater, close to the lunar south pole and a potential landing site for NASA’s Artemis 3 mission, which is slated to put astronauts on the moon in late 2025.

Another southern feature captured by Danuri is Drygalski Crater, showing the central peak inside the impact crater.

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ESA official confirms first Ariane-6 launch will not occur until 2024

9:45 am

The head of ESA yesterday confirmed what had been known since May, that the first test flight of its Ariane-6 rocket will not take place this year but will be delayed until 2024.

In an update on the Ariane 6 program also posted Tuesday, the ESA said that it could not complete a short hot firing test — which mimics the environment in space to provide data to operators — of Ariane’s Vulcain 2.1 engine system in a July attempt, with plans to try again on August 29.

Aschbacher said the tentative plan is to carry out a long hot fire test of the assembled core stage and engine on September 26 at the agency’s spaceport in French Guiana. If those tests are successful, it should then be possible to set a more precise timeline for getting the rocket system ready for launch next year.

It seems the inability of engineers to complete that July engine test — which ESA officials claimed was because they simply ran out of time — added at least a six-week delay to the entire program.

There delays leave Europe without any large rocket to launch payloads, and has forced its various governments to hire SpaceX to get those payloads into space.

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First stage of Chinese rocket crashes in Chinese city

9:34 am

Remains of Long March 2C, in Chinese city

Locals in the city of Shangluo, population over two million located in central China, today released video images of the remains of the first stage of a Long March 2C rocket that launched yesterday and apparently crashed in the city.

The image to the right is a screen capture. Since this two-stage rocket uses extremely toxic hypergolic fuels in both of its stages, those citizens wandering around the rocket’s remains are in great health danger.

China has in recent years has appeared taken actions to block the release of such videos by its citizens, but apparently failed in this case.

The irony is that this rocket supposedly launched what China called “a disaster reduction” satellite. That maybe so, but in the process it also dumped toxic materials on its own citizens.

Hat tip to BtB’s stringer Jay.

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NASA engineers still struggling to understand why Orion’s heat shield ablated so much

9:10 am

NASA engineers still do not understand why the heat shield on its Orion capsule ablated as it did during its return to Earth on the first unmanned Artemis-1 mission.

The agency is still running tests. It also expressed confidence that the issue will not delay the Artemis-2 mission, the first intended to carry humans on SLS and in Orion and still scheduled for late 2024.

At the same time, agency officials hinted that the third Artemis mission, which has always been planned as putting humans on the Moon for the first time since Apollo, might not achieve that goal. It is still not clear whether the mission’s lunar spacesuits as well as SpaceX’s Starship lunar lander will be ready on time. The latter is facing serious regulatory problems imposed by the Biden administration that is generally preventing it from flight testing the spacecraft.

That second Artemis mission, the first planned to carry humans, is one that actually at present carries the most risk. It will not only use a heat shield that at present engineers do not entirely understand, it will be the first Orion capsule to have the environmental systems necessary for its human cargo. NASA is putting humans on the first test flight of those systems.

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China’s Long March 2C rocket launches “disaster reduction” satellite

7:30 pm

China today used its Long March 2C rocket to place what it called a “disaster reduction” satellite into orbit, launching from its Taiyuan spaceport in the interior of China.

No other information was released, including whether the rocket’s lower stages landed near habitable areas.

The leaders in the 2023 launch race:

54 SpaceX
32 China
10 Russia
6 Rocket Lab
6 India

American private enterprise still leads China in successful launches 62 to 32, and the entire world combined 62 to 53, while SpaceX by itself still leads the world (excluding American companies) 54 to 53.

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NOAA lifts many restrictions on the release of commercial Earth observation images

3:09 pm

As part of a 2020 revision by Commerce to reduce regulations on satellites that monitor the Earth, NOAA has now lifted many of the restrictions it placed on the release of high resolution commercial Earth observation images.

NOAA said it lifted 39 restrictions on an unspecified number of licenses. Those restrictions include a reduction of global imaging restrictions for certain imaging modes and removal of restrictions on non-Earth imaging and rapid revisit. It also removed all temporary conditions on X-band synthetic aperture radar (SAR) imagery.

One of the companies that benefits from the removal of the conditions is SAR imaging company Umbra. The company announced Aug. 7 that, with the removal of the conditions, it can now offer SAR images to customers at a resolution of 16 centimeters, compared to no better than 25 centimeters under the old license conditions. “This means that we are finally able to offer customers the highest resolution images that our satellites are capable of capturing, setting the stage for even further expansion of products to customers,” said Gabe Dominocielo, Umbra’s co-founder and president, in a company statement.

The revision to the regulations, put in place in 2020, had been instigated by the Trump administration, and has apparently been left untouched by the Biden administration, at least up until now.

For the satellite companies it means they are much freer to produce that best imagery, and thus compete more successfully. For customers, it means that they will now have access the best imagery, in open competition. For news outlets attempting to report on things like the Ukraine War, for example, this ability will make it possible to improve the accuracy of the coverage.

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Ingenuity completes 54th flight, a short hop after previous flight ended prematurely

9:45 am

Overview map
Click for interactive map.

According to the Ingenuity engineering team, Ingenuity has successfully completed its 54th flight on Mars, a short 25 second hop up and down that was done to try to figure out why the previous flight previous flight, #53, had ended prematurely.

Flight 53 was planned as a 136-second scouting flight dedicated to collecting imagery of the planet’s surface for the Perseverance Mars rover science team. The complicated flight profile included flying north 666 feet (203 meters) at an altitude of 16 feet (5 meters) and a speed of 5.6 mph (2.5 meters per second), then descending vertically to 8 feet (2.5 meters), where it would hover and obtain imagery of a rocky outcrop. Ingenuity would then climb straight up to 33 feet (10 meters) to allow its hazard divert system to initiate before descending vertically to touch down.

Instead, the helicopter executed the first half of its autonomous journey, flying north at an altitude of 16 feet (5 meters) for 466 feet (142 meters). Then a flight-contingency program was triggered, and Ingenuity automatically landed. The total flight time was 74 seconds.

This explains why, after the 53rd flight, the engineering team had not immediately added that flight to the helicopter’s flight log. That log is now updated to include both the 53rd and 54th flights, but the data from the 53rd flight was held back until after the 54th flight was completed.

The green dot in the overview map above shows Ingenuity’s present position, only a few feet to the west from its previous position shown here. The blue dot indicates Perseverance’s present position. The red dotted line indicates the planned route of the rover.

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Startup orbital tug company signs deal from startup solar panel company

9:26 am

The new orbital tug company Atomos has now signed a deal with the new solar panel company, Solestial, to use the latter company’s solar panels in its tugs.

Neither company has yet flown anything in space, though both have contracts and demo missions scheduled.

Atomos plans to test a small Solestial photovoltaic panel on an orbital transfer vehicle demonstration set to launch on a SpaceX Transporter rideshare flight in early 2024. Solestial also will supply large solar blankets for two Atomos’ solar-electric OTVs slated to begin flying in late 2024 or early 2025.

Once again, these two companies illustrate the growth in the satellite industry produced by the lowering of launch costs. With less capital required to get to orbit, there is a larger margin for profit, thus encouraging companies with new ideas.

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Japanese startup signs deal to provide its smallsat thrusters to South Korean university

9:20 am

Pale Blue, a Japanese startup which focuses on building water-vapor thrusters for cubesats, has signed a deal with Yonsei University in South Korea to provide that school smallsat thrusters for the satellites built by its students.

“Our mission aims for demonstrating cutting-edge laser communication, orbital maneuvering and formation-keeping,” Sang-Young Park, a Yonsei University astronomy professor, said in a statement. “These thrusters perfectly meet our requirements and offer the advantage of being not only environmentally friendly, but also free from regulatory constraints.”

Pale Blue proved its Resistojet thruster in orbit for the first time in March on a Sony Corp. Star Sphere satellite. Pale Blue plans to establish mass production of Resistojet thrusters to reduce the cost and lead time for potential customers in the United States, Europe and Asia, said Yuichi Nakagawa, Pale Blue co-founder and chief technology officer.

The company is also developing both an ion and hybrid thruster for satellites, and is another example of how the lowering of launch costs has encouraged the arrival of many new space companies doing many different things.

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Dish and Echostar to merge

9:15 am

The communications satellite company Echostar is now merging with the direct broadcast company Dish. From the press release:

The transaction combines DISH Network’s satellite technology, streaming services and nationwide 5G network with EchoStar’s premier satellite communications solutions, creating a global leader in terrestrial and non-terrestrial wireless connectivity. Both companies have strong momentum, highlighted by DISH’s 5G wireless network that now covers more than 70 percent of the U.S. with full commercialization underway and the successful launch of EchoStar’s JUPITER 3 satellite with significant available capacity for converged terrestrial and non-terrestrial services. The combined company will be well-positioned to deliver a broad set of communication and content distribution capabilities, accelerating the delivery of satellite and wireless connectivity solutions desired by customers.

This merger is I think part of the consolidation that is going on among the older players in the communications satellite industry as they struggle to deal with the competition from the new satellites constellations of Starlink and OneWeb.

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Momentus is now selling a version of its orbital tug simply as a service module for satellites

9:09 am

The orbital tug company Momentus has discovered that it can make money selling a version of its orbital tug simply as a service module, or bus, for commercial and military satellites.

The company announced Aug. 2 that it was now offering customers a bus called the M-1000. The bus is similar to the Vigoride orbital transfer vehicle that Momentus has flown three times so far, but without the water-based propulsion system it uses for changing orbits.

The bus emerged from limitations flying hosted payloads on Vigoride, which remain attached to the tug rather than deployed as satellites. Rob Schwarz, chief technology officer at Momentus, said in an interview that the company started gauging interest a year ago in hosted payloads on Vigoride, including from U.S. government agencies. “What we’re finding is that a lot of government customers don’t really want to borrow the bus and lease it, but instead they want to own it,” he said. “Also, in some cases, because of the sensitivity of the payloads they don’t want to share it with other users.”

That led Momentus to instead consider a version of Vigoride that would be a satellite bus sold to customers instead of provided as a service. It uses many of the same subsystems, like avionics and power, as Vigoride. Changes include improved pointing and options for third-party chemical and electric propulsion systems.

This is just good and smart business practice. Momentus has a product that doesn’t appeal to some customers, in its designed iteration. Rather than trying to deny reality, the company quickly accepted the situation and revised its product in a somewhat easy way so it can be sold to those customers.

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Rocket Factory Augsburg raises $33 million in private investment capital

8:59 am

The German startup Rocket Factory Augsburg revealed today that it has raised $32.9 million in private investment capital at the same time it has shifted the launch date for the first rocket launch of its RFA-1 rocket from this year into next.

That launch was scheduled to occur at the Shetland spaceport, Saxavord, and as recently as April 2023 officials there were saying that this launch would occur this year. In June however Rocket Factory signed a deal with France’s space agency to use its long abandoned launchpad in French Guiana. That same month I predicted the launch at Saxavord would not happen this year, possibly because of regulatory hurdles in the United Kingdom.

It appears those hurdles might have been part of the reason for Rocket Factory’s deal with France. It needs a place to launch, and it appears the UK’s government is not presently conducive to allowing such things to happen easily.

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SpaceX successfully launches another 15 Starlink satellites

9:07 pm

I hope this doesn’t bore you: SpaceX tonight successfully used its Falcon 9 rocket to place another 15 Starlink satellites into orbit, lifting off from Vandenberg Space Force Base in California.

The first stage completed its fifth flight, landing successfully on a drone ship in the Pacific. The two fairings each completed their sixth flight. As of posting the satellites have not yet deployed.

The leaders in the 2023 launch race:

54 SpaceX
31 China
10 Russia
6 Rocket Lab
6 India

American private enterprise still leads China in successful launches 62 to 31, and the entire world combined 62 to 52, while SpaceX by itself leads the world (excluding American companies) 54 to 52.

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Boeing delays first manned Starliner flight again, until March of 2024

4:21 pm

Because of both parachute and wiring issues in its Starliner capsule, Boeing revealed today that it is delaying the first manned Starliner flight again, until March of 2024, so that it has time to change and test the parachutes as well as remove the flammable tape inside the capsule.

The company had been hoping to finally fly that first manned flight last month, but was forced to cancel when in June it discovered two shocking problems. First the connections between the parachutes and the capsule were too weak, and second, for some reason engineers had used tape to protect the capsule’s wiring that was too flammable and had to be replaced or covered somehow.

Boeing is taking the tape off in places where it’s easy and safe to do so and considering other remediation techniques, such as protective barriers or coatings over it, in trickier spots, Nappi said.

The parachute work is multifaceted as well. For example, Boeing has modified the soft link design to make it stronger, and the new version is being manufactured now, Nappi said. The company also decided to swap out Starliner’s parachute system, putting a new version slated for the first operational mission on board for [the crew flight test]. The new soft links will be incorporated into the new chutes, which will get to strut their stuff during a drop test soon. “We expect that the drop test will occur in mid to late November,” Nappi said. “That’s what the planning indicates at this point, and we’ll watch that closely.”

The seemingly endless number of mistakes and bad engineering that we have seen during the development of Starliner speaks very badly of Boeing in almost every way possible. These last two problems are especially egregious. Neither should have ever happened, and if so should never had been unnoticed until a mere month before launch and years into the project.

It must also be noted that March ’24 is merely a target date. Don’t bet the house on it happening then.

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Russia launches new GPS-type Glonass satellite

4:02 pm

Russia today used its Soyuz-2 rocket to place a new GPS-type Glonass satellite into orbit, lifting off from its Plesetsk spaceport in the northern Russian.

Apparently this launch resulted in its lower stages falling in areas in Russia not normally used as a drop zone. No word on whether they landed near habitable areas.

The leaders in the 2023 launch race:

53 SpaceX (with a launch planned for tonight, live stream here.)
31 China
10 Russia
6 Rocket Lab
6 India

American private enterprise still leads China in successful launches 61 to 31, and the entire world combined 61 to 52, while SpaceX by itself leads the world (excluding American companies) 53 to 52.

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Curiosity under the shadow of a Martian mountain

12:18 pm

Panorama showing Kukenan on August 8, 2023
Click for full resolution. For original images, go here and here.

Overview map
Click for interactive map

Another cool image to start the week! The panorama above was created using two navigation images taken by Curiosity on August 8, 2023. It looks almost due west at the dramatic western wall of 400-foot-high Kukenan butte.

The blue dot on the overview map to the right marks Curiosity’s present location. The yellow lines indicate approximately the area covered by the panorama above. The red dotted line indicates the rover’s planned route.

Recently JPL issued a press release touting the efforts of its engineers to overcome the very steep and rocky terrain that Curiosity is presently traversing, an effort that I have documented repeated in the past few months (see posts here and here). They had been trying to send Curiosity straight up the mountain, to no success, and finally decided to do what every hiker and trail-maker does routinely, do back and forth switchbacks to reduce the grade per step.

In June they headed slowly uphill going east. In July they turned back and worked their way uphill going west, heading back to the Jau crater complex to get a quick look at these craters, then turned again in August to head back east, slowly working uphill along the contour lines. As they do this the rover is moving closer and closer to Kukenan, the largest butte so far studied in the foothills of Mount Sharp.

This panorama is one of the best illustrations of the very complex geological history of Mars. Each layer signals a past cycle in Mars’ very cyclic history, created because of the red planet’s wide swings of rotational tilt over time. Once underground, these layers have become exposed because erosion over the eons has slowly removed the material that once buried it, leaving the butte behind.

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A ghostly bullseye galaxy

11:18 am

A ghostly bullseye
Click for original image.

A cool image to start the week! The picture to the right, cropped and reduced to post here, was taken by the Hubble Space Telescope as part of a survey scientists are doing using Hubble, attempting to get high resolution images of every galaxy within about 30 million light years of the Milky Way. Prior to this census Hubble had covered about 75% of these galaxies. This particular galaxy is called a lenticular galaxy.

Lenticular galaxies like NGC 6684 (lenticular means lens-shaped) possess a large disc but lack the prominent spiral arms of galaxies like the Andromeda Galaxy. This leaves them somewhere between elliptical galaxies and spiral galaxies, and lends these galaxies a diffuse, ghostly experience. NGC 6684 also lacks the dark dust lanes that thread through other galaxies, adding to its spectral, insubstantial appearance.

The unknown is whether this is the state of a galaxy prior to becoming a spiral, or it is what it looks like as it transitions from a spiral to an elliptical. This particular galaxy is likely the latter, as it lacks the dust, but this does not have to be the rule.

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Lockheed Martin opens factory to build smallsats on an assembly-line basis

10:41 am

Capitalism in space: As part of fulfilling a contract won from the Space Force, Lockheed Martin has now opened a new factory in Colorado expressly designed to build smallsats on an assembly-line basis.

Lockheed Martin’s 20,000-square-foot factory is located at the company’s Waterton campus near Denver, Colorado. It has six parallel assembly lines and capacity to manufacture 180 small satellites per year, Kevin Huttenhoff, Lockheed Martin’s senior manager for space data transport, told SpaceNews. The first satellites to be made at the facility are for the U.S. Space Force’s Space Development Agency. SDA plans to build a mesh network of hundreds of data transport and missile-detection sensor satellites in low Earth orbit.

Lockheed Martin in February 2022 won a $700 million contract to produce 42 communications satellites for SDA’s Transport Layer Tranche 1. The company in November 2020 also won a $187.5 million contract to manufacture 10 Transport Layer Tranche 0 satellites that are scheduled to launch later this month. The Transport Layer Tranche 1 satellites — projected to launch in late 2024 — will be made at the new factory. The Tranche 0 satellites were assembled at a different facility where Lockheed Martin manufactures Global Positioning System (GPS) spacecraft.

The multiple assembly lines allows the company to configure each for a different customer and satellite, with one for example producing smallsats for a military contract while another produces smallsats for a commercial customer.

Of all the big space companies, Lockheed Martin has made the most moves quickly adapting to the new space market of new rockets and small satellites. Not only has it built this facility, it has been an major investor in several new smallsat rocket companies, including Rocket Lab and ABL. It also opened its first assembly-line smallsat factory in 2017.

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SpaceX conducts static fire test of Superheavy and its launchpad systems

10:32 am

SpaceX yesterday conducted a static fire test of Superheavy and its launchpad systems at Boca Chica.

After a couple of hours of chilling the fuel lines, filling of the liquid oxygen and liquid methane tanks aboard Booster 9 began at T-Minus 67 minutes. The liquid oxygen tank was fully filled with the liquid methane only partially filled with what was required for the test.

After a smooth countdown, Booster 9 lit all 33 Raptor engines, however, 4 shut down early during the 2.74-second duration test. The test was intended to last 5 seconds.

The new water deluge system seemed to work as intended, albeit with a very short firing of the engines. Instead of a giant dust cloud that is usually formed after a static fire test, this test created a steam cloud that dissipated fairly quickly following the test.

The premature shutdown and the even earlier shut down of four engines suggests SpaceX still has kinks it needs to work out. No surprise. It will now probably switch out those four engines, analyze the test, and do it again. It will do so partly because it needs to before the orbital test flight, and partly because it can’t do that test flight because the FAA has still not issued a launch license.

I have embedded the video of that test below the fold.
» Read more

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ISRO releases first images of the Moon from Chandrayaan-3

10:23 am

The Moon as seen by Chandrayaan-3

India’s space agency ISRO yesterday released the first images taken of the Moon by Chandrayaan-3, soon after entering lunar orbit.

The picture to the right is a screen capture from the short movie the agency compiled from those images, available at the link. The pictures were taken on August 5th, during the engine burn that put the spacecraft into lunar orbit. A solar panel can be seen on the left, with the cratered lunar surface to the right.

Chandrayaan-3 is presently undergoing a series of engine burns to lower its orbit in preparation for a planned August 23rd lunar landing in the high southern latitudes of the Moon.

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SpaceX tonight successfully launches another 22 Starlink satellites

7:50 pm

SpaceX tonight successfully launched another 22 Starlink satellites, using its Falcon 9 rocket lifting off from Cape Canaveral.

The first stage completed its fourth flight, landing softly on a drone ship in the Atlantic. The two fairing halves completed their 8th and 10th flights respectively. As of posting the satellites have not yet been deployed.

The leaders in the 2023 launch race:

53 SpaceX
31 China
9 Russia
6 Rocket Lab
6 India

American private enterprise now leads China in successful launches 61 to 31, and the entire world combined 61 to 51, while SpaceX by itself leads the world (excluding American companies) 53 to 51.

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Chandrayaan-3 enters lunar orbit

9:38 am


Click for interactive map.

India’s Chandrayaan-3 spacecraft today successfully entered lunar orbit, where it will spend the next week or so slowly lowering its orbit in preparation for a landing attempt by its Vikram lander on August 23rd.

Chandrayaan-3 began a roughly 30-minute burn around 9:30 a.m. Eastern, seeing the spacecraft enter an elliptical lunar orbit, the Indian Space Research Organization (ISRO) stated via social media. “MOX, ISTRAC, this is Chandrayaan-3. I am feeling lunar gravity,” ISRO Tweeted. “A retro-burning at the Perilune was commanded from the Mission Operations Complex (MOX), ISTRAC, Bengaluru.”

The spacecraft will gradually alter its orbit with a burn to reduce apolune Sunday, Aug. 6. It will settle into a 100-kilometer-altitude, circular polar orbit on Aug. 17. From here, the Vikram lander will separate from the mission’s propulsion module and enter a 35 x 100-km orbit in preparation for landing.

If the landing attempt is successful, the Pragyam rover will roll off Vikram to operate for about two weeks on the lunar surface in the high southern latitudes of the Moon.

Meanwhile, the Russian lander Luna-25 will launch on August 10th. Since the rocket that launches it and engines it carries are larger than that used by Chandrayaan-3, it will likely land in Boguslawsky crater, before Vikram touches down nearby.

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Astra lays off 25% of workforce, mostly in its rocket departments

10:07 am

Astra revealed yesterday that it has laid off 25% of its workforce, with most of those jobs coming from those working of developing its rocket, in order to focus the company on its rocket engine business, the only area it at present has a chance of earning revenue.

The reallocation and layoffs are expected to delay testing of the under-development Rocket 4 and Launch System 2.0, Astra said. The affected employees worked in the company’s launch, sales and administration and “shared services” departments. Workforce reductions are expected to save the company more than $4 million per quarter beginning in the fourth quarter of this year.

Astra, which is facing dwindling cash reserves, is no doubt looking for a way to further reduce operating expenses while also bolstering its spacecraft engine business, the only business unit that currently has a near-term chance of generating revenue. The spacecraft engine technology is sourced from Astra’s acquisition of propulsion developer Apollo Fusion, which closed the day Astra went public in July 2021.

Indeed, Astra said that it had closed 278 committed orders of the Astra Spacecraft Engine product through the end of March, which totals around $77 million in contracts once the engines are delivered. A “substantial majority” of these orders will be delivered through the end of 2024, the company said.

What these actions mean is that Astra is no longer a rocket company. It might return eventually, but for now there is little chance it will resume launches for years.

It is interesting that this action was revealed only one day after a class-action lawsuit was dismissed by investors against the company for claiming that it would soon be launching 300 times per year.

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Engineers regain full control over Voyager 2

3:29 pm

A longshot effort by engineers has succeeded in re-establishing full communications with Voyager 2, launched in 1977 and flying outward at the edge of the solar system.

“The Deep Space Network used the highest-power transmitter to send the command (the 100-kw S-band uplink from the Canberra site) and timed it to be sent during the best conditions during the antenna tracking pass in order to maximize possible receipt of the command by the spacecraft,” Voyager project manager Suzanne Dodd told AFP. This so-called “interstellar shout” required 18.5 hours traveling at light speed to reach Voyager, and it took 37 hours for mission controllers to learn whether the command worked, JPL said in a statement.

The probe began returning science and telemetry data at 12:29 am Eastern Time on August 4, “indicating it is operating normally and that it remains on its expected trajectory,” added JPL.

Based on a weak signal received earlier, engineers were confident that the spacecraft was functioning in good order despite the loss in communications, and would automatically re-orient itself properly when it did an automatic reset in October. This attempt however fixed things now.

Regardless, the spacecraft probably only has a few more more years of operations before its nuclear powered source finally runs out sometime after 2025.

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