Tag: engineering

SpaceX completes two launches today

8:29 pm

SpaceX continued its relentless launch pace today, launching twice from opposite coasts.

First the company placed a National Reconnaissance Office surveillance satellite into orbit, its Falcon 9 rocket lifting off from Vandenberg in California. The first stage completed its 24th flight, landing on a drone ship in the Pacific.

Next SpaceX launched another 21 Starlink satellites, including 13 configured for direct-to-cell capabilities, its Falcon 9 rocket lifting off from Kennedy in Florida. The first stage completed its 10th flight, landing on a drone ship in the Atlantic.

The leaders in the 2025 launch race:

42 SpaceX
19 China
5 Rocket Lab
5 Russia

SpaceX now leads the rest of the world in successful launches, 42 to 33.

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New Trump executive order requires Pentagon to “prioritize commercial solutions”

9:24 am

A new Trump executive order signed on April 9, 2025 now requires the space divisions in the Defense Department to “prioritize commercial solutions” in all its future space projects.

The executive order, called “Modernizing Defense Acquisitions and Spurring Innovation in the Defense Industrial Base,” referenced commercial technology multiple times, including call to utilize existing authorities to “expedite acquisitions throughout the Department of Defense, including a first preference for commercial solutions” and “the restructuring of performance evaluation metrics for acquisition workforce members to include the ability to demonstrate and apply a first consideration of commercial solutions.”

According to Pentagon officials, this order simply underlines what they have been doing. Maybe so, but the reason the Pentagon has been moving in this direction is not because it wanted to, but because of two factors in the past decade that forced action. First, for the past three decades the Pentagon has increasingly failed to get much accomplished in space. Under Air Force leadership (before the creation of the Space Force) the military focused on designing its own big satellites, creating projects that generally went overbudget and behind schedule. That general failure demanded change.

Second, to institute change Trump created the Space Force in his first term with the express desire to shift the military from building its own gold-plated satellites to buying them from the private sector. And despite the four years when Biden was president, the Pentagon maintained that shift, which is why this new Trump executive order will do little to disturb its present space plans.

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Indian satellite thruster manufacturer opens American factory

9:09 am

Capitalism in space: The Indian satellite company Bellatrix, which up-to-now has manufactured electrical attitude thrusters for satellites built by India’s space agency, has now opened a factory in Delaware in order to attract business from American satellite companies.

Bellatrix hired Chris MacDonald, a former business development director at rocket developer Astra and satellite provider Terran Orbital, to lead its recently created U.S. subsidiary, headquartered in Delaware. The manufacturing facility would support localized production, testing and delivery of propulsion systems to enable faster turnaround times and closer collaboration with U.S.-based customers, MacDonald said via email.

Founded in 2015, Bellatrix’s electric hall effect thruster has been used in a handful of missions for India’s space agency in recent years.

Bellatrix is not the only foreign space company to open offices in the U.S. for similar reasons. The Japanese startups Astroscale and Ispace have done the same, as well as several other companies listed in the article at the link. It appears the new American launch industry, which has significantly lowered the cost to orbit, is attracting orbital business from across the world.

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Vast signs three more customers to fly payloads on its first space station

8:58 am

Haven-1 with docked Dragon capsule
Haven-1 with docked Dragon capsule

The space station startup company Vast has now signed up three more customers to fly payloads on its first space station, Haven-1, due to launch now in the spring of 2026 on a 30-day-long private commercial manned mission.

Vast announced April 8 that Japan Manned Space Systems Corporation (JAMSS), Interstellar Lab and Exobiosphere will fly research payloads on the Haven-1 station launching no earlier than May 2026. They join Redwire and Yuri as payload partners for the station.

JAMSS, which has supported research on Japan’s Kibo module on the International Space Station, will provide a multi-purpose payload facility for microgravity research on Haven-1. Interstellar Lab, a French company, will provide an advanced life sciences research facility called Eden 1.0 that will be used for experiments such as plant growth. Exobiosphere, based in Luxembourg, will fly a biotechnology payload to perform pharmaceutical and healthcare experiments.

The company says it still has one or two payload racks available for additional customers, suggesting that it is finding enough demand to justify profitable commercial operations.

Below are the four private space stations presently under development, with those I consider the most advanced in development ranked first:

  • Haven-1, being built by Vast, with no NASA funds. The company is moving fast, with Haven-1 to launch and be occupied in 2026 for a 30 day mission. It hopes this actual hardware and manned mission will put it in the lead to win NASA’s phase 2 contract, from which it will build its much larger mult-module Haven-2 station..
  • Axiom, being built by Axiom, has launched three tourist flights to ISS, with a fourth scheduled for this spring, carrying passengers from India, Hungary, and Poland. Though there have been rumors it has cash flow issues, development of its first module has been proceeding more or less as planned.
  • Orbital Reef, being built by a consortium led by Blue Origin and Sierra Space. Though Blue Origin has apparently done little, Sierra Space has successfully tested its inflatable modules, including a full scale version, and appears ready to start building the station’s modules for launch.
  • Starlab, being built by a consortium led by Voyager Space, Airbus, and Northrop Grumman. It recently had its station design approved by NASA.
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China launches another technology test communications satellite payload

10:52 pm

China today successfully launched a test technology satellite for doing “multi-band and high-speed communication technology validation tests, possibly for future large internet/communications constellations, its Long March 3B rocket lifting off from its Xichang spaceport in southwest China.

No word on where the rocket’s lower stages and four strap-on boosters, all using very toxic hypergolic fuels, crashed inside China.

The leaders in the 2025 launch race:

40 SpaceX
19 China
5 Rocket Lab
5 Russia

SpaceX still leads the rest of the world in successful launches, 40 to 33.

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Curiosity climbs into a new Martian canyon

1:41 pm

Curiosity looking south
Click image for full resolution panorama. Click here, here, and here for original images.

Overview map
Click for interactive map.

Cool image time! The Curiosity science team has finally completed the rover’s climb up one canyon on the flanks of Mount Sharp and crossed over into a second, switch-backing up through a gap they have dubbed Devil’s Gate.

The panorama above, created from three pictures taken by Curiosity’s left navigation camera on April 9, 2025 (here, here, and here) looks south from that gap. On the horizon about 20-30 miles away can be seen the rim of Gale Crater. From this position the floor of the crater is almost out of side, blocked by the foothills on the lower flanks of Mount Sharp.

Though the ground in this new canyon (on the left of the panorama) continues to be amazingly rocky and boulder strewn, it is actually more benign that the canyon Curiosity has been climbing for the past six weeks.

The blue dot on the overview map to the right marks Curiosity’s present position, with the yellow lines indicating the approximate direction of the panorama. The rover’s next major geological goal is the boxwork to the southwest. In order to get to it quickly the science team decided to abandon its original planned route, indicated by the dotted red line, and climb upward through these canyons.

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Chinese scientists say the lunar far side appears drier than the near side

10:17 am

Map of water measurements of lunar samples
Click for original image.

Based on a comparison of samples brought back by two Chinese unmanned lunar landers, Chinese scientists believe the lunar far side contains far less water in its mantle than the near side.

…the research team focused on analyzing water content and hydrogen isotopes in melt inclusions and apatite within [Chang’e-6] mare basalts—the first samples returned from the farside SPA Basin.

The team’s results indicate that the parent magma of these basalts contain 15–168 μg.g⁻¹ of water. Additionally, the team estimated that the mantle source of the CE6 basalts has a water content of 1–1.5 μg.g⁻¹, significantly lower than that of the nearside mantle. This disparity points to a potential hemispheric dichotomy in the Moon’s internal water distribution, mirroring many of the asymmetrical features observed on the lunar surface.

The map to the right, figure 1 in the scientists’ paper, shows the water content from the samples that have so far been brought back from the Moon. Note how the Chang’e-6 sample shows far less water content than all the near side samples.

Note however also that this is just one data point from the far side. To confirm these conclusions will require many more samples.

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Anti-Musk terrorists damage Musk statue in Brownsville

9:23 am

In another demonstration of their intolerance and willingness to commit violence and vandalism, anti-Musk terrorists have damaged a bust of Elon Musk in Brownsville that had been placed there by a French entrepreneur.

A 9-foot-tall statue depicting a bust of tech billionaire Elon Musk has been vandalized in South Texas. According to multiple posts across social media, the statue of the SpaceX CEO was vandalized not far from where the company’s Starbase facility sits near Boca Chica Beach.

“The recently installed Elon Musk statue, known as ‘Elonrwa,’ has been damaged. Visible patches of the outer layer appear to have been peeled off the face,” a Facebook user who goes by RGV.me said in an April 8 Facebook post. The Facebook post is accompanied by a photograph showing two areas where it appears a top layer of material has been stripped from the statue, revealing a white or pale gray layer underneath.

This senseless hate of Musk, almost certainly committed by supporters of the Democratic Party — which has been encouraging this violence because it sees Musk as an opponent — must end. And if the fools perpetrating this vandalism don’t come to their senses and stop voluntarily, they should be stopped by force and imprisonment. Just because you disagree with someone on policy does not give you the right to break the law.

And if you doubt this vandalism isn’t being spurred on eagerly by the leadership of the now vile and wholly evil Democratic Party, you need only watch that party’s Senate leader, Senator Charles Schumer (D-New York), practically endorse it when asked:
» Read more

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Juno enters and then recovers from safe mode

9:03 am

During its most recent close fly-by of Jupiter on April 4, 2025 — its 71st — the orbiter Juno went into safe mode two different times, causing its science instruments to shut down.

The mission operations team has reestablished high-rate data transmission with Juno, and the spacecraft is currently conducting flight software diagnostics.The team will work in the ensuing days to transmit the engineering and science data collected before and after the safe-mode events to Earth.

Juno first entered safe mode at 5:17 a.m. EDT, about an hour before its 71st close passage of Jupiter — called perijove. It went into safe mode again 45 minutes after perijove. During both safe-mode events, the spacecraft performed exactly as designed, rebooting its computer, turning off nonessential functions, and pointing its antenna toward Earth for communication.

Since arrival in its present Jupiter orbit in 2016 Juno has operated almost perfectly, having experienced only two other safe mode events, once in 2016 and a second in 2022. The two recent events on this most recent fly-by suggest however that the harsh environment surrounding Jupiter might be beginning to impact the spacecraft.

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Isaacman’s nomination hearing reveals nothing of note

10:00 am

Jared Isaacman
Jared Isaacman

The Senate committee on commerce, science, and transportation has just concluded its hearing on the nomination of Jared Isaacman as NASA administrator. Several take-aways:

First, there was little opposition to Isaacman on either side of the aisle. He will be confirmed easily.

Second, Isaacman was very careful to say nothing that might commit him to keeping all present Artemis programs (such as SLS, Orion, or Gateway) unchanged. He instead made it clear his goal is for NASA to attempt a parallel programs to establish a permanent American presence on both the Moon and Mars. This enthusiasm suggests he sees Starship as the vehicle capable of making those parallel programs possible.

In other words, he kept his options open. His goal is to get the Artemis program functioning more efficiently, and will do whatever is necessary to do so. He repeatedly made it clear that too many of NASA’s projects, including specifically Artemis, are routinely overbudget and behind schedule, and this must be fixed.

At the same time he said his goal is to get Americans back to the Moon ahead of the Chinese, and suggested that the present plan using SLS and Orion is likely the fastest way to do so. The technical issues that might make that program very unsafe for the astronauts however were never mentioned.

We shall see whether Isaacman as administrator will be so sanguine about sending Americans around the Moon within an Orion capsule with a questionable heat shield.

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Firefly wins Space Force contract to test orbital maneuvers with its Elytra space tug

12:33 pm

Firefly yesterday announced it has been awarded a Space Force contract to use its Elytra space tug to test orbital maneuvers designed for military purposes.

As part of the mission, Elytra will host a suite of government payloads, including optical visible and infrared cameras, a responsive navigation unit, and a universal electrical bus with a payload interface module. Firefly’s Elytra Dawn configuration will utilize common components from the company’s launch vehicles and lunar landers, including the avionics, composite structures, and propulsion systems, to enable on-demand mobility, plane changes, and maneuvers with high delta-V capabilities and reliability.

Though unstated, the inclusion of cameras suggests the Pentagon wants to test Elytra’s ability to maneuver close to other satellites and photograph them.

This contract further illustrates Firefly’s effort to diversify its space products. Like Rocket Lab, it is not relying solely on its rocket division to make money, but is also developing and selling a range of space products, from lunar landers to orbital tugs to satellite equipment.

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Space Force gives SpaceX launch originally contracted to ULA

8:45 am

For the second time in less than a year, the Space Force has taken a launch away from ULA and given the payload to SpaceX to launch.

The GPS III SV-08 satellite, the eighth in the GPS III constellation, is now scheduled to launch no earlier than late May aboard a SpaceX Falcon 9 rocket from Cape Canaveral Space Force Station, Florida, the Space Systems Command announced April 7.

This marks the second time in recent months that the Space Force has reassigned a GPS launch from ULA to SpaceX. Last year, the GPS III SV-07 satellite was moved from a planned ULA Vulcan rocket launch in late 2025 to a SpaceX Falcon 9, which successfully launched on December 16 in a mission called Rapid Response Trailblazer.

Both switches were apparently triggered because of the delay in getting ULA’s new Vulcan rocket certified by the military, resulting in all of ULA’s launches in 2025 being pushed back significantly. That certification finally occurred a few weeks ago, but it appears the Space Force has decided that ULA won’t be able to get all those launches off this year as planned. It therefore decided to shift this launch to SpaceX.

This situation once again highlights the importance of private companies to move fast in the open competition of private enterprise. SpaceX has always done this, and thus it gets contracts and business that other companies that move with the speed of molasses lose.

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Russia launches three astronauts to ISS

10:57 pm

Russia early on April 8, 2025 successfully launched two Russians and one American to ISS on a six month mission, its Soyuz-2 rocket lifting off from its Baikonur spaceport in Kazakhstan.

They will dock with ISS after only two orbits, three hours after launch.

The leaders in the 2025 launch race:

40 SpaceX
18 China
5 Rocket Lab
5 Russia

SpaceX still leads the rest of the world in successful launches, 40 to 32.

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SpaceX launches 27 more Starlink satellites using a new first stage

8:16 pm

SpaceX today successfully placed 27 Starlink satellites into orbit, its Falcon 9 rocket lifting off from Vandenberg in California.

The first stage completed its first flight, landing on a drone ship in the Pacific. In the past three years SpaceX has been launching about one to two new first stages per year in order to sustain its fleet, and this launch follows that pattern.

The leaders in the 2025 launch race:

40 SpaceX
18 China
5 Rocket Lab
4 Russia (with a manned Soyuz launch scheduled for the early morning hours)

SpaceX now leads the rest of the world in successful launches, 40 to 31.

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The mighty scale of Mars’ geology

12:16 pm

The mighty scale of Mars
Click for original image.

Today’s cool image is just one more example out of hundreds I have posted in the past decade of the difficult-to-imagine gigantic scale of the Martian landscape.

The picture to the right, rotated, cropped, reduced, and sharpened to post here, was taken on March 1, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The image title is simple, “Steep Slopes of Olympus Mons Caldera,” and tells us that this cliff face, about 1,300 feet high, is part of the caldera that resides on top of Mars’ largest volcano, Olympus Mons.

The parallel cracks on the plateau above the cliff tell us that the cliff face is slowly separating outward from that plateau, and that at some point in the future the entire wall will collapse downward.

Sounds impressive and big, eh? What the picture doesn’t make clear however is how truly tiny this cliff is in the context of the entire mountain.
» Read more

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Soil bacterium from Earth can both make and repair bricks made from Moon-materials

9:36 am

Researchers in India have now discovered that the same soil bacterium from Earth they used to manufacture bricks made from Moon-materials can also act to repair cracks in those bricks.

A few years ago, researchers at the Department of Mechanical Engineering (ME), IISc developed a technique that uses a soil bacterium called Sporosarcina pasteurii to build bricks out of lunar and Martian soil simulants. The bacterium converts urea and calcium into calcium carbonate crystals that, along with guar gum, glue the soil particles together to create brick-like materials. This process is an eco-friendly and low-cost alternative to using cement.

… In a new study, they created different types of artificial defects in sintered bricks and poured a slurry made from S. pasteurii, guar gum, and lunar soil simulant into them. Over a few days, the slurry penetrated into the defects and the bacterium produced calcium carbonate, which filled them up. The bacterium also produced biopolymers which acted as adhesives that strongly bound the soil particles together with the residual brick structure, thereby recovering much of the brick’s lost strength. This process can stave off the need to replace damaged bricks with new ones, extending the lifespan of built structures.

These results are encouraging but not necessarily for space exploration. This research can likely be applied with great profit here on Earth to repair damaged materials already in place.

As for using it in space or on the Moon, great uncertainties remain, such is whether the bacteria could even survive or function in a different gravity environment. The team hopes to test this on one of India’s planned Gangayaan manned missions.

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Fram2: The first X-ray image taken in space

9:04 am

First X-ray taken in space
Click for original.

During the commercial and private Fram2 flight last week, the crew used equipment developed by two commercial companies, MinXray in Chicago and KA Imaging in Canada, to take the first X-ray images of a human being.

The picture to the right shows the hand of one of the crew, with a ring on one finger. From the press release:

Chicago-based MinXray is contributing its IMPACT system, a compact, battery-powered X-ray generator designed for use in remote environments, including space. Its rechargeable lithium-ion battery eliminates the need for external power sources, making it an ideal solution for microgravity applications.

KA Imaging’s Reveal 35C X-ray Detector was selected for this mission due to its cutting-edge SpectralDR technology. The Reveal 35C provides dual-energy subtraction imaging in a single exposure, generating three distinct images: soft tissue, bone, and a traditional digital radiograph.

Apparently the two companies have combined their resources to develop a fully portable X-ray machine small enough to be transported in a capsule, and partnered with the Fram2 team to test it in weightlessness for the first time. With refinements a larger machine could be sold and installed in space stations for both medical research as well as simple doctoring.

Because weightlessness causes the loss of bone density in the weight-bearing bones, such technology has long been critically necessary in orbit for studying and possible mitigating that problem. That after decades NASA failed to get it built and installed in ISS, yet a private mission made it happen, illustrates once again the advantages of a free and competitive private sector in space. NASA’s complex rules for getting experiments on ISS frequently acts to block some experiments. The lack of those rules on private missions allows for things to happen quickly.

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Space Force awards SpaceX, ULA, and Blue Origin $13.7 billion in launch contracts

10:41 am

The Space Force yesterday awarded a combined $13.7 billion in launch contracts to SpaceX, ULA, and Blue Origin, covering military launches through 2032.

The contracts, announced April 4 by the U.S. Space Force’s Space Systems Command, are part of the National Security Space Launch (NSSL) Phase 3 Lane 2 procurement, a cornerstone initiative designed to bolster the Pentagon’s access to space for its most sensitive and risk-averse missions.

SpaceX emerged as the leading contractor, securing $5.9 billion in anticipated awards, followed by ULA at nearly $5.4 billion and Blue Origin at nearly $2.4 billion. The three companies are expected to collectively perform 54 launches under the agreement between fiscal years 2025 and 2029.

Based on the contracts, SpaceX will do 28 launches, ULA 19, and Blue Origin 7. Since these launches include many military payloads that must go on “risk-adverse” rockets, the distribution of launches makes sense. While SpaceX’s rockets (Falcon 9 and Falcon Heavy) are well proven to be reliable, both ULA and Blue Origin launch with new rockets, Vulcan and New Glenn respectively, that have barely yet left the factory. Vulcan has done only two launches, with the second having technical issues (supposedly resolved). Blue Origin has done only one successful launch, though it failed to land the first stage as planned.

The distribution however serves the needs of both the military and the American rocket industry. It gives the Pentagon redundancy, multiple launch providers. And it gives America the same, three competing rocket companies striving for business and profit.

The result is going to be a very vibrant American space effort, doing a lot of things having nothing to do with the Pentagon.

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Another “What the heck?!” image on Mars

1:48 pm

Another
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on March 2, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

The scientists label this “Monitoring Irregular Terrains in Western Arabia Terra.” I label it more bluntly as another one of MRO’s “What the heck?!” images. For all I know, this is nothing more than a discarded Vincent Van Gogh painting, thrown out because even he couldn’t figure out what he was painting.

The best guess I can make, just from the picture alone, is that some of the dark spots are vents from which the white stuff vented at some point, either as small lava or mud volcanoes. As the location is close to the equator, near surface ice is almost certainly not a factor in what we see.

In any case there is no way to reasonably decipher this picture, just by looking at the picture. It is necessary to take a wider view.
» Read more

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Fram2 private manned mission splashes down safely

10:29 am

The Fram2 private commercial manned mission successfully ended today when SpaceX’s Resilience capsule splashed down safely off the coast of California.

The crew spent about four days in space, circling the Earth in the first polar orbit by a human crew.

This was SpaceX’s sixth privately funded manned mission. Three docked with ISS and were paid for by Axiom. Three flew independently, with two paid by Jared Isaacman and one by Chun Weng (which landed today). Plus Axiom has scheduled its next ISS commercial flight for May, 2025, using a new SpaceX capsule (bringing the company’s manned fleet to five spacecraft).

As I noted earlier this week, SpaceX is making space exploration profitable, which in turn makes the government irrelevant. And ain’t that a kick?

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White dwarf binary discovered only 150 light years away is a major supernova candidate in about 23 billion years

9:35 am

Astronomers have discovered only 150 light years away the most massive white dwarf binary system yet detected, that they believe is a major candidate for producing one type of supernova many billions of years in the future.

White dwarf stars in binary systems are thought to produce Type 1a supernova. The dwarf sucks material from the companion star, which eventually piles up on the surface of the dwarf until the extra mass, more than 1.4 times the mass of the Sun (dubbed the Chandrasekhar mass limit), causes the supernova explosion.

That’s the theory at least. Up to now astronomers have not yet observed this process, prior to the supernova. This newly discovered binary system however is a prime candidate, because its combined mass is already 1.55 the mass of the Sun. According to the researchers’ computer models, when these stars come close to merging the result will be a Type 1a supernova. From the peer reviewed paper:

The interaction of the accretion stream with the surface of the primary white dwarf ignites a helium detonation close to the point of interaction. The helium detonation then wraps around the primary white dwarf and sends a shock wave into its core that converges at a single point. This ignites a second detonation that completely destroys the primary white dwarf. When the shock wave of its explosion hits the secondary white dwarf, the double detonation mechanism repeats itself. The shock wave from the detonation of the primary ignites a helium detonation near the surface of the secondary which drives a shock wave into its core. It is sufficient to ignite the core detonation, destroying the secondary white dwarf as well.

These events won’t occur tomorrow however. The two stars orbit each other every 14 hours, but their high mass is causing gravitational waves to ripple outward from the system, robbing it of energy. The orbits of the stars are thus spiraling inward. In about 23 billion years they will be about to merge, which will be the moment when the above explosive events are predicted to occur.

If at that moment the binary system was still only 150 light years away, the explosion would do great harm to the Earth and likely cause a major extinction. In 23 billion years however the binary will no longer be so close, and could in fact be on the other side of the Milky Way.

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Engineers use simulated moon dust to make glass

9:06 am

Engineers have successfully manufactured glass using simulated moon dust, and found this “moonglass” works better than Earth glass in solar panels.

To test the idea, the researchers melted a substance designed to simulate Moon dust into moonglass and used it to build a new kind of solar cell. They crafted the cells by pairing moonglass with perovskite—a class of crystals that are cheaper, easier to make, and very efficient in turning sunlight into electricity. For every gram of material sent to space, the new panels produced up to 100 times more energy than traditional solar panels.

…When the team zapped the solar cells with space-grade radiation, the moonglass versions outperformed the Earth-made ones. Standard glass slowly browns in space, blocking sunlight and reducing efficiency. But moonglass has a natural brown tint from impurities in the Moon dust, which stabilizes the glass, prevents it from further darkening, and makes the cells more resistant to radiation.

Though encouraging, they are many unknowns that could become show stoppers. For one, this research was all done in Earth gravity. In the Moon’s 1/6th gravity the results might be very different. For another, all they have done is demonstrate a way to make glass using Moon dust. That is a far cry from building solar panels, as implied by the press release.

Nonetheless, the results demonstrate one more way in which a lunar base can eventually become self-sufficient, the inevitable goal.

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Terraces within one of Mars’ giant enclosed chasms

12:20 pm

Overview map

Terraces within Hebes Chasma

Cool image time! The picture to the right, rotated, cropped, reduced, and sharpened to post here, was taken on January 27, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows the terraced layers descending down a 7,000-foot-high ridgeline within Hebes Chasma, one of several enclosed chasms that are found to the north of Mars’s largest canyon system, Valles Marineris.

The white dot on the overview map above marks this location, inside Hebes. The rectangle in the inset indicates the area covered by the picture, which only covers the lower 5,000 feet of this ridge’s southern flank.

The ridgeline might be 7,000 feet high and sixteen miles long, but it is dwarfed by the scale of the chasm within which it sits. From the rim to the floor of Hebes is a 23,000 foot drop, comparable to the general heights of the Himalaya Mountains. Furthermore, this ridge is not the highest peak within Hebes. To the west is the much larger mesa dubbed Hebes Mensa, 11,000 feet high and 55 miles long.

The terraces indicate the cyclical and complex geological history of Mars. Each probably represents a major volcanic eruption, laying down a new bed of flood lava. With time, something caused Hebes Chasm to get excavated, exposing this ridge and these layers.

The excavation process itself remains unclear. Some scientists think the entire Valles Marineris canyon was created by catastrophic floods of liquid water. Others posit the possibility of underground ice aquifers that sublimated away, causing the surface to sink, eroded further by wind. Neither theory is proven, though the former is generally favored by scientists.

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Iran accelerates plans for new coastal spaceport

10:01 am

Iran's spaceports

According to Iran’s state-run press, the government is about to begin the next construction phase for its proposed new coastal spaceport near the city of Chabahar.

The head of the Iranian Space Agency has announced that the second phase of the Chabahar spaceport for semi-heavy liquid-fueled launchers is to be inaugurated in the current Persian calendar year. Hassan Salarieh said on Tuesday that the first phase of the Chabahar spaceport is for solid fuel launchers and is expected to be inaugurated this year (which started March 21), adding that adequate studies were conducted regarding the second phase of the site in previous years and the new phase for semi-heavy liquid fuel launchers is to be opened during the year.

The details are very vaguely words. Will launches of solid-fueled rockets begin this year, or construction? Earlier reports had promised the first launch from Chabahar would occur in March 2025. That clearly has not occurred.

This spaceport will supplement Iran’s older Semnan launch facility in the country’s interior, from which all previous Iranian launches have occurred.

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ULA and Amazon schedule first Kuiper satellite launch for April 9, 2025

9:49 am

The launch of the first 27 satellites in Amazon’s 3,200-plus satellite Kuiper internet constellation has now been scheduled for April 9, 2025, using ULA’s Atlas-5 rocket lifting off from Cape Canaveral.

The Kuiper constellation, intended to compete directly with SpaceX’s Starlink constellation, was first conceived at about the same time as Starlink. Since then — while Amazon moved slowly launching only two test satellites — SpaceX launched thousands and signed up millions of customers, grabbing market share that it will be difficult for Kuiper to re-capture.

The launch will also be the first in 2025 for ULA, which had hoped to do as many as 25 launches this year with its old soon-to-be-retired Atlas-5 and new Vulcan rocket. The six-month delay in getting the Pentagon to finally certify Vulcan for commercial military launches has put a damper on that plan. Right now ULA will be lucky if it can complete half those launches.

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Webb infrared data increases odds asteroid 2024 YR4 will impact Moon in 2032

9:40 am

Asteroid 2024 YR4 as seen by Webb in the mid-infrared
Asteroid 2024 YR4 as seen by Webb in the
mid-infrared. Click for original image.

Using new infrared images and data from the Webb Space Telescope, astronomers have further refined the orbit and size of the potentially dangerous asteroid 2024 YR4.

The image of 2024 YR4 to the right was taken by Webb’s mid-infrared camera, and provides information on its thermal surface characteristics.

First, the Webb data narrowed the uncertainty about the asteroid’s size, suggesting it is about 200 feet in diameter. You can read the paper outlining this result here. The data also suggested nature of the asteroid’s surface, which is important in determining its future path. The pressure from sunlight can change the orbits of small asteroids, but figuring out how much is extremely difficult without knowing the rotation of the asteroid and the reflective qualities of its entire surface.

Second, based on this new data, other astronomers are increasingly certain 2024 YR4 will not hit the Earth in 2032, but the odds of it impacting the Moon have now increased to 4%.

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Update on the private Fram2 manned orbital spaceflight

9:15 am

The crew of Fram2 in weightlessness

In the past day the crew of the private Fram2 manned orbital spaceflight have released several updates, describing their initial experience in weightlessness as well as releasing some images of themselves inside the Resilience capsule.

First, on April 1, 2025 the mission commander, Chun Wang, the billionaire who paid for the flight, posted a tweet describing how all four crew members experienced space sickness the first day in orbit.

The first few hours in microgravity weren’t exactly comfortable. Space motion sickness hit all of us—we felt nauseous and ended up vomiting a couple of times. It felt different from motion sickness in a car or at sea. You could still read on your iPad without making it worse. But even a small sip of water could upset your stomach and trigger vomiting.

Things however quickly settled down, allowing them to open the nose cone so that they could see out the large cupola window. They released the first images of the Antarctic, and followed soon after with the first images of themselves inside Resilience. The picture to the right, taken by Wang, shows is three crewmates, Jannicke Mikkelsen, Rabea Rogge, and Eric Philips clearly now enjoying the experience of weightlessness.

Still no word on a return date. The mission was initially supposed to last 3 to 5 days. We are now on day three, with no indications of a planned return date.

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China launches radar-related satellite

8:47 am

China today successfully launched a technology satellite designed to calibrate “ground-based radar equipment”, its Long March 6 rocket lifting off from its Taiyuan spaceport in northern China.

No word on where the rocket’s lower stages crashed inside China.

The leaders in the 2025 launch race:

37 SpaceX (with another Starlink launch later today)
18 China
5 Rocket Lab
4 Russia

SpaceX now leads the rest of the world in successful launches, 37 to 31.

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