Science – Page 32

Have we finally solved mystery of magnetic moon rocks?

asteroids, astrophysics, core dynamo, geology, magnetism, moon rocks, paleomagnetism, Science, the Moon / Paul Patrick / May 24, 2025

NASA’s Apollo missions brought back moon rock samples for scientists to study. We’ve learned a great deal over the ensuing decades, but one enduring mystery remains. Many of those lunar samples show signs of exposure to strong magnetic fields comparable to Earth’s, yet the Moon doesn’t have such a field today. So, how did the moon rocks get their magnetism?

There have been many attempts to explain this anomaly. The latest comes from MIT scientists, who argue in a new paper published in the journal Science Advances that a large asteroid impact briefly boosted the Moon’s early weak magnetic field—and that this spike is what is recorded in some lunar samples.

Evidence gleaned from orbiting spacecraft observations, as well as results announced earlier this year from China’s Chang’e 5 and Chang’e 6 missions, is largely consistent with the existence of at least a weak magnetic field on the early Moon. But where did this field come from? These usually form in planetary bodies as a result of a dynamo, in which molten metals in the core start to convect thanks to slowly dissipating heat. The problem is that the early Moon’s small core had a mantle that wasn’t much cooler than its core, so there would not have been significant convection to produce a sufficiently strong dynamo.

There have been proposed hypotheses as to how the Moon could have developed a core dynamo. For instance, a 2022 analysis suggested that in the first billion years, when the Moon was covered in molten rock, giant rocks formed as the magma cooled and solidified. Denser minerals sank to the core while lighter ones formed a crust.

Over time, the authors argued, a titanium layer crystallized just beneath the surface, and because it was denser than lighter minerals just beneath, that layer eventually broke into small blobs and sank through the mantle (gravitational overturn). The temperature difference between the cooler sinking rocks and the hotter core generated convection, creating intermittently strong magnetic fields—thus explaining why some rocks have that magnetic signature and others don’t.

Or perhaps there is no need for the presence of a dynamo-driven magnetic field at all. For instance, the authors of a 2021 study thought earlier analyses of lunar samples may have been altered during the process. They re-examined samples from the 1972 Apollo 16 mission using CO₂ lasers to heat them, thus avoiding any alteration of the magnetic carriers. They concluded that any magnetic signatures in those samples could be explained by the impact of meteorites or comets hitting the Moon.

Have we finally solved mystery of magnetic moon rocks? Read More »

US solar keeps surging, generating more power than hydro in 2025

coal, Energy, hydro, natural gas, Science, solar, Wind / Kris Guyer / May 24, 2025

Under those circumstances, the rest of the difference will be made up for with fossil fuels. Running counter to recent trends, the use of natural gas dropped during the first three months of 2025. This means that the use of coal rose nearly as quickly as demand, up by 23 percent compared to the same time period in 2024.

Despite the rise in coal use, the fraction of carbon-free electricity held steady year over year, with wind/solar/hydro/nuclear accounting for 43 percent of all power put on the US grid. That occurred despite small drops in nuclear and hydro production.

Solar power also passed a key milestone in 2025, although it requires digging through the statistics to realize it. In terms of power on the grid, there was less solar than hydro. But the Energy Information Agency also estimates the production from small-scale solar, like the kind you’d find on people’s roofs. Some of this never enters the grid and instead simply offsets demand locally (in that it gets used by the house that sits beneath the panels). If you combine the TW-hr produced by small- and grid-scale solar, however, they surpass the production from hydropower by a significant margin.

This surge in solar comes on top of a 30 percent increase in production the year prior. The growth curve is clearly not slowing down.

That dynamic is also not likely to change immediately in response to cuts to tax breaks for renewable power that were part of the budget package passed by the House of Representatives on Thursday, and not only because some Republican senators might object to budget changes that will harm their states. Solar power in most areas is now cheaper than alternatives, even without subsidies, and any power plant (renewable or otherwise) will likely see its costs rise due to the tariff environment. Finally, the tax breaks don’t expire immediately, and most power plant construction requires significant advanced planning.

All of those factors should continue the solar boom for at least a couple more years before all of the expected changes apply the brakes.

US solar keeps surging, generating more power than hydro in 2025 Read More »

Rocket Report: SpaceX’s expansion at Vandenberg; India’s PSLV fails in flight

rocket report, Science, Space / Kris Guyer / May 23, 2025

China’s diversity in rockets was evident this week, with four types of launchers in action.

Dawn Aerospace’s Mk-II Aurora airplane in flight over New Zealand last year. Credit: Dawn Aerospace

Welcome to Edition 7.45 of the Rocket Report! Let’s talk about spaceplanes. Since the Space Shuttle, spaceplanes have, at best, been a niche part of the space transportation business. The US Air Force’s uncrewed X-37B and a similar vehicle operated by China’s military are the only spaceplanes to reach orbit since the last shuttle flight in 2011, and both require a lift from a conventional rocket. Virgin Galactic’s suborbital space tourism platform is also a spaceplane of sorts. A generation or two ago, one of the chief arguments in favor of spaceplanes was that they were easier to recover and reuse. Today, SpaceX routinely reuses capsules and rockets that look much more like conventional space vehicles than the winged designs of yesteryear. Spaceplanes are undeniably alluring in appearance, but they have the drawback of carrying extra weight (wings) into space that won’t be used until the final minutes of a mission. So, do they have a future?

As always, we welcome reader submissions. If you don’t want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets, as well as a quick look ahead at the next three launches on the calendar.

One of China’s commercial rockets returns to flight. The Kinetica-1 rocket launched Wednesday for the first time since a failure doomed its previous attempt to reach orbit in December, according to the vehicle’s developer and operator, CAS Space. The Kinetica-1 is one of several small Chinese solid-fueled launch vehicles managed by a commercial company, although with strict government oversight and support. CAS Space, a spinoff of the Chinese Academy of Sciences, said its Kinetica-1 rocket deployed multiple payloads with “excellent orbit insertion accuracy.” This was the seventh flight of a Kinetica-1 rocket since its debut in 2022.

Back in action … “Kinetica-1 is back!” CAS Space posted on X. “Mission Y7 has just successfully sent six satellites into designated orbits, making a total of 63 satellites or 6 tons of payloads since its debut. Lots of missions are planned for the coming months. 2025 is going to be awesome.” The Kinetica-1 is designed to place up to 2 metric tons of payload into low-Earth orbit. A larger liquid-fueled rocket, Kinetica-2, is scheduled to debut later this year.

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French government backs a spaceplane startup. French spaceplane startup AndroMach announced May 15 that it received a contract from CNES, the French space agency, to begin testing an early prototype of its Banger v1 rocket engine, European Spaceflight reports. Founded in 2023, AndroMach is developing a pair of spaceplanes that will be used to perform suborbital and orbital missions to space. A suborbital spaceplane will utilize turbojet engines for horizontal takeoff and landing, and a pressure-fed biopropane/liquid oxygen rocket engine to reach space. Test flights of this smaller vehicle will begin in early 2027.

A risky proposition … A larger ÉTOILE “orbital shuttle” is designed to be launched by various small launch vehicles and will be capable of carrying payloads of up to 100 kilograms (220 pounds). According to the company, initial test flights of ÉTOILE are expected to begin at the beginning of the next decade. It’s unclear how much CNES is committing to AndroMach through this contract, but the company says the funding will support testing of an early demonstrator for its propane-fueled engine, with a focus on evaluating its thermodynamic performance. It’s good to see European governments supporting developments in commercial space, but the path to a small commercial orbital spaceplane is rife with risk. (submitted by EllPeaTea)

Dawn Aerospace is taking orders. Another spaceplane company in a more advanced stage of development says it is now taking customer orders for flights to the edge of space. New Zealand-based Dawn Aerospace said it is beginning to take orders for its remotely piloted, rocket-powered suborbital spaceplane, known as Aurora, with first deliveries expected in 2027, Aviation Week & Space Technology reports. “This marks a historic milestone: the first time a space-capable vehicle—designed to fly beyond the Kármán line (100 kilometers or 328,000 feet)—has been offered for direct sale to customers,” Dawn Aerospace said in a statement. While it hasn’t yet reached space, Dawn’s Aurora spaceplane flew to supersonic speed for the first time last year and climbed to an altitude of 82,500 feet (25.1 kilometers), setting a record for the fastest climb from a runway to 20 kilometers.

Further along … Aurora is small in stature, measuring just 15.7 feet (4.8 meters) long. It’s designed to loft a payload of up to 22 pounds (10 kilograms) above the Kármán line for up to three minutes of microgravity, before returning to a runway landing. Eventually, Dawn wants to reduce the turnaround time between Aurora flights to less than four hours. “Aurora is set to become the fastest and highest-flying aircraft ever to take off from a conventional runway, blending the extreme performance of rocket propulsion with the reusability and operational simplicity of traditional aviation,” Dawn said. The company’s business model is akin to commercial airlines, where operators can purchase an aircraft directly from a manufacturer and manage their own operations. (submitted by EllPeaTea)

India’s workhorse rocket falls short of orbit. In a rare setback, Indian Space Research Organisation’s (ISRO) launch vehicle PSLV-C61 malfunctioned and failed to place a surveillance satellite into the intended orbit last weekend, the Times of India reported. The Polar Satellite Launch Vehicle lifted off from a launch pad on the southeastern coast of India early Sunday, local time, with a radar reconnaissance satellite named EOS-09, or RISAT-1B. The satellite was likely intended to gather intelligence for the Indian military. “The country’s military space capabilities, already hindered by developmental challenges, have suffered another setback with the loss of a potential strategic asset,” the Times of India wrote.

What happened? … V. Narayanan, ISRO’s chairman, later said that the rocket’s performance was normal until the third stage. The PSLV’s third stage, powered by a solid rocket motor, suffered a “fall in chamber pressure” and the mission could not be accomplished, Narayanan said. Investigators are probing the root cause of the failure. Telemetry data indicated the rocket deviated from its planned flight path around six minutes after launch, when it was traveling more than 12,600 mph (5.66 kilometers per second), well short of the speed it needed to reach orbital velocity. The rocket and its payload fell into the Indian Ocean south of the launch site. This was the first PSLV launch failure in eight years, ending a streak of 21 consecutive successful flights. (submitted by EllPeaTea)

SES makes a booking with Impulse Space. SES, owner of the world’s largest fleet of geostationary satellites, plans to use Impulse Space’s Helios kick stage to take advantage of lower-cost, low-Earth-orbit (LEO) launch vehicles and get its satellites quickly into higher orbits, Aviation Week & Space Technology reports. SES hopes the combination will break a traditional launch conundrum for operators of medium-Earth-orbit (MEO) and geostationary orbit (GEO). These operators often must make a trade-off between a lower-cost launch that puts them farther from their satellite’s final orbit, or a more expensive launch that can expedite their satellite’s entry into service.

A matter of hours … On Thursday, SES and Impulse Space announced a multi-launch agreement to use the methane-fueled Helios kick stage. “The first mission, currently planned for 2027, will feature a dedicated deployment from a medium-lift launcher in LEO, followed by Helios transferring the 4-ton-class payload directly to GEO within eight hours of launch,” Impulse said in a statement. Typically, this transit to GEO takes several weeks to several months, depending on the satellite’s propulsion system. “Today, we’re not only partnering with Impulse to bring our satellites faster to orbit, but this will also allow us to extend their lifetime and accelerate service delivery to our customers,” said Adel Al-Saleh, CEO of SES. “We’re proud to become Helios’ first dedicated commercial mission.”

Unpacking China’s spaceflight patches. There’s a fascinating set of new patches Chinese officials released for a series of launches with top-secret satellites over the last two months, Ars reports. These four patches depict Buddhist gods with a sense of artistry and sharp colors that stand apart from China’s previous spaceflight emblems, and perhaps—or perhaps not—they can tell us something about the nature of the missions they represent. The missions launched so-called TJS satellites toward geostationary orbit, where they most likely will perform missions in surveillance, signals intelligence, or missile warning.

Making connections … It’s not difficult to start making connections between the Four Heavenly Gods and the missions that China’s TJS satellites likely carry out in space. A protector with an umbrella? An all-seeing entity? This sounds like a possible link to spy craft or missile warning, but there’s a chance Chinese officials approved the patches to misdirect outside observers, or there’s no connection at all.

China aims for an asteroid. China is set to launch its second Tianwen deep space exploration mission late May, targeting both a near-Earth asteroid and a main belt comet, Space News reports. The robotic Tianwen-2 spacecraft is being integrated with a Long March 3B rocket at the Xichang Satellite Launch Center in southwest China, the country’s top state-owned aerospace contractor said. Airspace closure notices indicate a four-hour-long launch window opening at noon EDT (16: 00–20: 00 UTC) on May 28. Backup launch windows are scheduled for May 29 and 30.

New frontiers … Tianwen-2’s first goal is to collect samples from a near-Earth asteroid designated 469219 Kamoʻoalewa, or 2016 HO3, and return them to Earth in late 2027 with a reentry module. The Tianwen-2 mothership will then set a course toward a comet for a secondary mission. This will be China’s first sample return mission from beyond the Moon. The asteroid selected as the target for Tianwen-2 is believed by scientists to be less than 100 meters, or 330 feet, in diameter, and may be made of material thrown off the Moon some time in its ancient past. Results from Tianwen-2 may confirm that hypothesis. (submitted by EllPeaTea)

Upgraded methalox rocket flies from Jiuquan. Another one of China’s privately funded launch companies achieved a milestone this week. Landspace launched an upgraded version of its Zhuque-2E rocket Saturday from the Jiuquan launch base in northwestern China, Space News reports. The rocket delivered six satellites to orbit for a range of remote sensing, Earth observation, and technology demonstration missions. The Zhuque-2E is an improved version of the Zhuque-2, which became the first liquid methane-fueled rocket in the world to reach orbit in 2023.

Larger envelope … This was the second flight of the Zhuque-2E rocket design, but the first to utilize a wider payload fairing to provide more volume for satellites on their ride into space. The Zhuque-2E is a stepping stone toward a much larger rocket Landspace is developing called the Zhuque-3, a stainless steel launcher with a reusable first stage booster that, at least outwardly, bears some similarities to SpaceX’s Falcon 9. (submitted by EllPeaTea)

FAA clears SpaceX for Starship Flight 9. The Federal Aviation Administration gave the green light Thursday for SpaceX to launch the next test flight of its Starship mega-rocket as soon as next week, following two consecutive failures earlier this year, Ars reports. The failures set back SpaceX’s Starship program by several months. The company aims to get the rocket’s development back on track with the upcoming launch, Starship’s ninth full-scale test flight since its debut in April 2023. Starship is central to SpaceX’s long-held ambition to send humans to Mars and is the vehicle NASA has selected to land astronauts on the Moon under the umbrella of the government’s Artemis program.

Targeting Tuesday, for now … In a statement Thursday, the FAA said SpaceX is authorized to launch the next Starship test flight, known as Flight 9, after finding the company “meets all of the rigorous safety, environmental and other licensing requirements.” SpaceX has not confirmed a target launch date for the next launch of Starship, but warning notices for pilots and mariners to steer clear of hazard areas in the Gulf of Mexico suggest the flight might happen as soon as the evening of Tuesday, May 27. The rocket will lift off from Starbase, Texas, SpaceX’s privately owned spaceport near the US-Mexico border. The FAA’s approval comes with some stipulations, including that the launch must occur during “non-peak” times for air traffic and a larger closure of airspace downrange from Starbase.

Space Force is fed up with Vulcan delays. In recent written testimony to a US House of Representatives subcommittee that oversees the military, the senior official responsible for purchasing launches for national security missions blistered one of the country’s two primary rocket providers, Ars reports. The remarks from Major General Stephen G. Purdy, acting assistant secretary of the Air Force for Space Acquisition and Integration, concerned United Launch Alliance and its long-delayed development of the large Vulcan rocket. “The ULA Vulcan program has performed unsatisfactorily this past year,” Purdy said in written testimony during a May 14 hearing before the House Armed Services Committee’s Subcommittee on Strategic Forces. This portion of his testimony did not come up during the hearing, and it has not been reported publicly to date.

Repairing trust … “Major issues with the Vulcan have overshadowed its successful certification resulting in delays to the launch of four national security missions,” Purdy wrote. “Despite the retirement of highly successful Atlas and Delta launch vehicles, the transition to Vulcan has been slow and continues to impact the completion of Space Force mission objectives.” It has widely been known in the space community that military officials, who supported Vulcan with development contracts for the rocket and its engines that exceeded $1 billion, have been unhappy with the pace of the rocket’s development. It was originally due to launch in 2020. At the end of his written testimony, Purdy emphasized that he expected ULA to do better. As part of his job as the Service Acquisition Executive for Space (SAE), Purdy noted that he has been tasked to transform space acquisition and to become more innovative. “For these programs, the prime contractors must re-establish baselines, establish a culture of accountability, and repair trust deficit to prove to the SAE that they are adopting the acquisition principles necessary to deliver capabilities at speed, on cost and on schedule.”

SpaceX’s growth on the West Coast. SpaceX is moving ahead with expansion plans at Vandenberg Space Force Base, California, that will double its West Coast launch cadence and enable Falcon Heavy rockets to fly from California, Spaceflight Now reports. Last week, the Department of the Air Force issued its Draft Environmental Impact Statement (EIS), which considers proposed modifications from SpaceX to Space Launch Complex 6 (SLC-6) at Vandenberg. These modifications will include changes to support launches of Falcon 9 and Falcon Heavy rockets, the construction of two new landing pads for Falcon boosters adjacent to SLC-6, the demolition of unneeded structures at SLC-6, and increasing SpaceX’s permitted launch cadence from Vandenberg from 50 launches to 100.

Doubling the fun … The transformation of SLC-6 would include quite a bit of overhaul. Its most recent tenant, United Launch Alliance, previously used it for Delta IV rockets from 2006 through its final launch in September 2022. The following year, the Space Force handed over the launch pad to SpaceX, which lacked a pad at Vandenberg capable of supporting Falcon Heavy missions. The estimated launch cadence between SpaceX’s existing Falcon 9 pad at Vandenberg, known as 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. (submitted by EllPeaTea)

Next three launches

May 23: Falcon 9 | Starlink 11-16 | Vandenberg Space Force Base, California | 20: 36 UTC

May 24: Falcon 9 | Starlink 12-22 | Cape Canaveral Space Force Station, Florida | 17: 19 UTC

May 27: Falcon 9 | Starlink 17-1 | Vandenberg Space Force Base, California | 16: 14 UTC

Stephen Clark is a space reporter at Ars Technica, covering private space companies and the world’s space agencies. Stephen writes about the nexus of technology, science, policy, and business on and off the planet.

Rocket Report: SpaceX’s expansion at Vandenberg; India’s PSLV fails in flight Read More »

FAA: Airplanes should stay far away from SpaceX’s next Starship launch

Commercial space, Federal Aviation Administration, launch, Science, Space, spacex, Starbase, starship, starship flight 9 / Rejus Almole / May 23, 2025

“The FAA is expanding the size of hazard areas both in the US and other countries.”

The Starship for SpaceX’s next test flight, known as Ship 35, on the move between the production site at Starbase (in background) and the Massey’s test facility for a static fire test. Credit: SpaceX

The Federal Aviation Administration gave the green light Thursday for SpaceX to launch the next test flight of its Starship mega-rocket as soon as next week, following two consecutive failures earlier this year.

The failures set back SpaceX’s Starship program by several months. The company aims to get the rocket’s development back on track with the upcoming launch, Starship’s ninth full-scale test flight since its debut in April 2023. Starship is central to SpaceX’s long-held ambition to send humans to Mars and is the vehicle NASA has selected to land astronauts on the Moon under the umbrella of the government’s Artemis program.

In a statement Thursday, the FAA said SpaceX is authorized to launch the next Starship test flight, known as Flight 9, after finding the company “meets all of the rigorous safety, environmental and other licensing requirements.”

SpaceX has not confirmed a target launch date for the next launch of Starship, but warning notices for pilots and mariners to steer clear of hazard areas in the Gulf of Mexico suggest the flight might happen as soon as the evening of Tuesday, May 27. The rocket will lift off from Starbase, Texas, SpaceX’s privately owned spaceport near the US-Mexico border.

This will be the third flight of SpaceX’s upgraded Block 2, or Version 2, Starship rocket. The first two flights of Starship Block 2—in January and March—did not go well. On both occasions, the rocket’s upper stage shut down its engines prematurely and the vehicle lost control, breaking apart in the upper atmosphere and spreading debris near the Bahamas and the Turks and Caicos Islands.

Debris from Starship falls back into the atmosphere after Starship Flight 8 in this view over Hog Cay, Bahamas. Credit: GeneDoctorB via X

Investigators determined the cause of the January failure was a series of fuel leaks and fires in the ship’s aft compartment. The leaks were most likely triggered by vibrations that were more intense than anticipated, SpaceX said before Starship’s most recent flight in March. SpaceX has not announced the cause of the March failure, although the circumstances were similar to the mishap in January.

“The FAA conducted a comprehensive safety review of the SpaceX Starship Flight 8 mishap and determined that the company has satisfactorily addressed the causes of the mishap, and therefore, the Starship vehicle can return to flight,” the agency said. “The FAA will verify SpaceX implements all corrective actions.”

Flight safety

The flight profile for the next Starship launch will largely be a repeat of what SpaceX hoped to accomplish on the ill-fated tests earlier this year. If all goes according to plan, the rocket’s upper stage, or ship, will travel halfway around the world from Starbase, reaching an altitude of more than 100 miles before reentering the atmosphere over the Indian Ocean. A little more than an hour after liftoff, the ship will aim for a controlled splashdown in the ocean northwest of Australia.

Apart from overcoming the problems that afflicted the last two launches, one of the most important objectives for this flight is to test the performance of Starship’s heat shield. Starship Block 2 includes improved heat shield materials that could do better at protecting the ship from the superheated temperatures of reentry and, ultimately, make it easier to reuse the vehicle. The problems on the last two Starship test flights prevented the rocket from reaching the point where its heat shield could be tested.

Starship Block 2 also features redesigned flaps to better control the vehicle during its descent through the atmosphere. This version of Starship also has larger propellant tanks and reconfigured fuel feed lines for the ship’s six Raptor engines.

The FAA’s approval for Starship Flight 9 comes with some stipulations. The agency is expanding the size of hazard areas in the United States and in other countries based on an updated “flight safety analysis” from SpaceX and because SpaceX will reuse a previously flown first-stage booster—called Super Heavy—for the first time.

The aircraft hazard area for Starship Flight 9 extends approximately 1,600 nautical miles to the east from Starbase, Texas. Credit: Federal Aviation Administration

This flight-safety analysis takes into account the outcomes of previous flights, including accidents, population exposure risk, the probability of vehicle failure, and debris propagation and behavior, among other considerations. “The FAA uses this and other data to determine and implement measures to mitigate public risk,” the agency said.

All of this culminated in the FAA’s “return to flight determination,” which the agency says is based on public safety. The FAA’s primary concern with commercial space activity is ensuring rocket launches don’t endanger third parties. The agency also requires that SpaceX maintain at least $500 million in liability insurance to cover claims resulting from the launch and flight of Starship Flight 9, the same requirement the FAA levied for previous Starship test flights.

For the next launch, the FAA will establish an aircraft hazard area covering approximately 1,600 nautical miles extending eastward from Starbase, Texas, and through the Straits of Florida, including the Bahamas and the Turks and Caicos Islands. This is an extension of the 885-nautical-mile hazard area the FAA established for the test flight in March. In order to minimize disruption to commercial and private air traffic, the FAA is requiring the launch window for Starship Flight 9 to be scheduled during “non-peak transit periods.”

The size of FAA-mandated airspace closures can expand or shrink based on the reliability of the launch vehicle. The failures of Starship earlier this year raised the probability of vehicle failure in the flight-safety analysis for Starship Flight 9, according to the FAA.

The expanded hazard area will force the closure of more than 70 established air routes across the Gulf of Mexico and now includes the Bahamas and the Turks and Caicos Islands. The FAA anticipates this will affect more than 175 flights, almost all of them on international connecting routes. For airline passengers traveling through this region, this will mean an average flight delay of approximately 40 minutes, and potentially up to two hours, the FAA said.

If SpaceX can reel off a series of successful Starship flights, the hazard areas will likely shrink in size. This will be important as SpaceX ramps up the Starship launch cadence. The FAA recently approved SpaceX to increase its Starship flight rate from five per year to 25 per year.

The agency said it is in “close contact and collaboration” with other nations with territory along or near Starship’s flight path, including the United Kingdom, Turks and Caicos, the Bahamas, Mexico, and Cuba.

Status report

Meanwhile, SpaceX’s hardware for Starship Flight 9 appears to be moving closer to launch. Engineers test-fired the Super Heavy booster, which SpaceX previously launched and recovered in January, last month on the launch pad in South Texas. On May 12, SpaceX fired the ship’s six Raptor engines for 60 seconds on a test stand near Starbase.

After the test-firing, ground crews rolled the ship back to the Starship production site a few miles away, only to return the vehicle to the test stand Wednesday for unspecified testing. SpaceX is expected to roll the ship back to the production site again before the end of the week.

The final steps before launch will involve separately transporting the Super Heavy booster and Starship upper stage from the production site to the launch pad. There, SpaceX will stack the ship on top of the booster. Once the two pieces are stacked together, the rocket will stand 404 feet (123.1 meters) tall.

If SpaceX moves forward with a launch attempt next Tuesday evening, the long-range outlook from the National Weather Service calls for a 30 percent chance of showers and thunderstorms.

FAA: Airplanes should stay far away from SpaceX’s next Starship launch Read More »

New data confirms: There really is a planet squeezed in between two stars

astronomy, exoplanets, exosolar systems, Science, white dwarf / Paul Patrick / May 23, 2025

And, critically, the entire orbit is within the orbit of the smaller companion star. The gravitational forces of a tight binary should prevent any planets from forming within this space early in the system’s history. So, how did the planet end up in such an unusual configuration?

A confused past

The fact that one of the stars present in ν Octantis is a white dwarf suggests some possible explanations. White dwarfs are formed by Sun-like stars that have advanced through a late helium-burning period that causes them to swell considerably, leaving the outer surface of the star weakly bound to the rest of its mass. At the distances within ν Octantis, that would allow considerable material to be drawn off the outer companion and pulled onto the surface of what’s now the central star. The net result is a considerable mass transfer.

This could have done one of two things to place a planet in the interior of the system. One is that the transferred material isn’t likely to make an immediate dive onto the surface of the nearby star. If the process is slow enough, it could have produced a planet-forming disk for a brief period—long enough to produce a planet on the interior of the system.

Alternatively, if there were planets orbiting exterior to both stars, the change in the mass distribution of the system could have potentially destabilized their orbits. That might be enough to cause interactions among the planets to send one of them spiraling inward, where it was eventually captured in the stable retrograde orbit we now find it.

Either case, the authors emphasize, should be pretty rare, meaning we’re unlikely to have imaged many other systems like this at this stage of our study of exoplanets. They do point to another tight binary, HD 59686, that appears to have a planet in a retrograde orbit. But, as with ν Octantis, the data isn’t clear enough to rule out alternative configurations yet. So, once again, more data is needed.

Nature, 2025. DOI: 10.1038/s41586-025-09006-x (About DOIs).

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Scientists figure out how the brain forms emotional connections

Biology, emitions, neurobiology, Science / Paul Patrick / May 22, 2025

Whenever something bad happens to us, brain systems responsible for mediating emotions kick in to prevent it from happening again. When we get stung by a wasp, the association between pain and wasps is encoded in the region of the brain called the amygdala, which connects simple stimuli with basic emotions.

But the brain does more than simple associations; it also encodes lots of other stimuli that are less directly connected with the harmful event—things like the place where we got stung or the wasps’ nest in a nearby tree. These are combined into complex emotional models of potentially threatening circumstances.

Till now, we didn’t know exactly how these models are built. But we’re beginning to understand how it’s done.

Emotional complexity

“Decades of work has revealed how simple forms of emotional learning occurs—how sensory stimuli are paired with aversive events,” says Joshua Johansen, a team director at the Neural Circuitry of Learning and Memory at RIKEN Center for Brain Science in Tokyo. But Johansen says that these decades didn’t bring much progress in treating psychiatric conditions like anxiety and trauma-related disorders. “We thought if we could get a handle of more complex emotional processes and understand their mechanisms, we may be able to provide relief for patients with conditions like that,” Johansen claims.

To make it happen, his team performed experiments designed to trigger complex emotional processes in rats while closely monitoring their brains.

Johansen and Xiaowei Gu, his co-author and colleague at RIKEN, started by dividing the rats into two groups. The first “paired” group of rats was conditioned to associate an image with a sound. The second “unpaired” group watched the same image and listened to the same sound, but not at the same time. This prevented the rats from making an association.

Scientists figure out how the brain forms emotional connections Read More »

The physics of frilly Swiss cheese “flowers”

Cheese, Food science, friction, Physics, Science, Swiss cheese / Paul Patrick / May 22, 2025

For their experiments, the authors of the PRL paper selected samples of Monk’s head cheese wheels from the Fromagerie de Bellelay brand that had been aged between three and six months. They cut each cheese wheel in half and mounted each half on a Girolle, motorizing the base to ensure a constant speed of rotation and making sure the blade was in a fixed position. Their measurements of how the cheese deformed during scraping enabled them to build a model based on metal dynamics on a two-dimensional surface that had “cheese-like properties.”

The results showed that there was a variable friction between the core and the edge of the cheese wheel, because the core stayed fresher during the ripening process. Because the harder outer edge had lower friction with the blade, the edges of the cheese shavings were uneven in thickness—hence the resemblance to frilly rosettes.

This essentially amounts to a new shaping mechanism with the possibility of being able to one day program complex shaping from “a simple scraping process,” per the authors. “Our analysis provides the tools for a better control of flower chip morphogenesis through plasticity in the shaping of other delicacies, but also in metal cutting,” they concluded. Granted, “flower-shaped chips have never been reported in metal cutting. But even in such uniform materials, the fact that friction properties control the metric change is particularly interesting for material shaping.”

Physical Review Letters, 2025. DOI: 10.1103/PhysRevLett.134.208201 (About DOIs).

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Incredible shrinking clownfish beats the heat

animal behavior, Biology, clownfish, Science / Kris Guyer / May 22, 2025

Let’s get small

The team observed 67 breeding pairs of wild clownfish—briefly caught and photographed for distinctive markings and measured before being returned to the water—living on single anemones in Kimbe Bay, Papua New Guinea, between February and August 2023. This happened to coincide with the world’s fourth global bleaching event. They measured the body size of the fish once a month and measured the temperature around the individual anemones every four to six days. Then the team analyzed the collected data.

two clownfish swimming around a white anemone against a black background — “Individual fish can shrink in response to heat stress.” Credit: Morgan Bennett-Smith

The results: Over the course of those months, 101 of the 134 clownfish shrank at least once in response to heat stress, and doing so boosted their likelihood of survival up to 78 percent compared to the 33 fish that did not shrink. And between breeding pairs, there were distinctive growth ratios between the dominant and subordinate fish; those pairs that shrank together were also more likely to survive the heat waves.

“We were so surprised to see shrinking in these fish that, to be sure, we measured each fish individual repeatedly over a period of five months,” said Versteeg. “In the end, we discovered it was very common in this population. It was a surprise to see how rapidly clownfish can adapt to a changing environment, and we witnessed how flexibly they regulated their size, as individuals and as breeding pairs, in response to heat stress as a successful technique to help them survive.”

Versteeg et al. have not yet identified a possible mechanism for the shrinkage, but suggest the triggering of neuroendocrine pathways via thyroid hormones might play a role, since those hormones regulate growth. The adaptive strategy could also be a means of adjusting to changing metabolic needs. But there are trade-offs: While shrinking in response to heat waves ensures greater survivability, there can also be a corresponding decrease in birth rates.

“Our findings show that individual fish can shrink in response to heat stress, which is further impacted by social conflict, and that shrinking can lead to improving their chances of survival,” said senior author Theresa Rueger, also of Newcastle University. “If individual shrinking were widespread and happening among different species of fish, it could provide a plausible alternative hypothesis for why the size of many fish species is declining, and further studies are needed in this area.”

Science Advances, 2025. DOI: 10.1126/sciadv.adt7079 (About DOIs).

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How 3D printing is personalizing health care

3D printing, prosthetics, Science, syndication / Paul Patrick / May 21, 2025

Prosthetics are becoming increasing affordable and accessible thanks to 3D printers.

Three-dimensional printing is transforming medical care, letting the health care field shift from mass-produced solutions to customized treatments tailored to each patient’s needs. For instance, researchers are developing 3D-printed prosthetic hands specifically designed for children, made with lightweight materials and adaptable control systems.

These continuing advancements in 3D-printed prosthetics demonstrate their increasing affordability and accessibility. Success stories like this one in personalized prosthetics highlight the benefits of 3D printing, in which a model of an object produced with computer-aided design software is transferred to a 3D printer and constructed layer by layer.

We are a biomedical engineer and a chemist who work with 3D printing. We study how this rapidly evolving technology provides new options not just for prosthetics but for implants, surgical planning, drug manufacturing, and other health care needs. The ability of 3D printing to make precisely shaped objects in a wide range of materials has led to, for example, custom replacement joints and custom-dosage, multidrug pills.

Better body parts

Three-dimensional printing in health care started in the 1980s with scientists using technologies such as stereolithography to create prototypes layer by layer. Stereolithography uses a computer-controlled laser beam to solidify a liquid material into specific 3D shapes. The medical field quickly saw the potential of this technology to create implants and prosthetics designed specifically for each patient.

One of the first applications was creating tissue scaffolds, which are structures that support cell growth. Researchers at Boston Children’s Hospital combined these scaffolds with patients’ own cells to build replacement bladders. The patients remained healthy for years after receiving their implants, demonstrating that 3D-printed structures could become durable body parts.

As technology progressed, the focus shifted to bioprinting, which uses living cells to create working anatomical structures. In 2013, Organovo created the world’s first 3D-bioprinted liver tissue, opening up exciting possibilities for creating organs and tissues for transplantation. But while significant advances have been made in bioprinting, creating full, functional organs such as livers for transplantation remains experimental. Current research focuses on developing smaller, simpler tissues and refining bioprinting techniques to improve cell viability and functionality. These efforts aim to bridge the gap between laboratory success and clinical application, with the ultimate goal of providing viable organ replacements for patients in need.

Three-dimensional printing already has revolutionized the creation of prosthetics. It allows prosthetics makers to produce affordable custom-made devices that fit the patient perfectly. They can tailor prosthetic hands and limbs to each individual and easily replace them as a child grows.

Three-dimensionally printed implants, such as hip replacements and spine implants, offer a more precise fit, which can improve how well they integrate with the body. Traditional implants often come only in standard shapes and sizes.

Some patients have received custom titanium facial implants after accidents. Others had portions of their skulls replaced with 3D-printed implants.

Additionally, 3D printing is making significant strides in dentistry. Companies such as Invisalign use 3D printing to create custom-fit aligners for teeth straightening, demonstrating the ability to personalize dental care.

Scientists are also exploring new materials for 3D printing, such as self-healing bioglass that might replace damaged cartilage. Moreover, researchers are developing 4D printing, which creates objects that can change shape over time, potentially leading to medical devices that can adapt to the body’s needs.

For example, researchers are working on 3D-printed stents that can respond to changes in blood flow. These stents are designed to expand or contract as needed, reducing the risk of blockage and improving long-term patient outcomes.

Simulating surgeries

Three-dimensionally printed anatomical models often help surgeons understand complex cases and improve surgical outcomes. These models, created from medical images such as X-rays and CT scans, allow surgeons to practice procedures before operating.

For instance, a 3D-printed model of a child’s heart enables surgeons to simulate complex surgeries. This approach can lead to shorter operating times, fewer complications, and lower costs.

Personalized pharmaceuticals

In the pharmaceutical industry, drugmakers can three-dimensionally print personalized drug dosages and delivery systems. The ability to precisely layer each component of a drug means that they can make medicines with the exact dose needed for each patient. The 3D-printed anti-epileptic drug Spritam was approved by the Food and Drug Administration in 2015 to deliver very high dosages of its active ingredient.

Drug production systems that use 3D printing are finding homes outside pharmaceutical factories. The drugs potentially can be made and delivered by community pharmacies. Hospitals are starting to use 3D printing to make medicine on-site, allowing for personalized treatment plans based on factors such as the patient’s age and health.

However, it’s important to note that regulations for 3D-printed drugs are still being developed. One concern is that postprinting processing may affect the stability of drug ingredients. It’s also important to establish clear guidelines and decide where 3D printing should take place – whether in pharmacies, hospitals or even at home. Additionally, pharmacists will need rigorous training in these new systems.

Printing for the future

Despite the extraordinarily rapid progress overall in 3D printing for health care, major challenges and opportunities remain. Among them is the need to develop better ways to ensure the quality and safety of 3D-printed medical products. Affordability and accessibility also remain significant concerns. Long-term safety concerns regarding implant materials, such as potential biocompatibility issues and the release of nanoparticles, require rigorous testing and validation.

While 3D printing has the potential to reduce manufacturing costs, the initial investment in equipment and materials can be a barrier for many health care providers and patients, especially in underserved communities. Furthermore, the lack of standardized workflows and trained personnel can limit the widespread adoption of 3D printing in clinical settings, hindering access for those who could benefit most.

On the bright side, artificial intelligence techniques that can effectively leverage vast amounts of highly detailed medical data are likely to prove critical in developing improved 3D-printed medical products. Specifically, AI algorithms can analyze patient-specific data to optimize the design and fabrication of 3D-printed implants and prosthetics. For instance, implant makers can use AI-driven image analysis to create highly accurate 3D models from CT scans and MRIs that they can use to design customized implants.

Furthermore, machine learning algorithms can predict the long-term performance and potential failure points of 3D-printed prosthetics, allowing prosthetics designers to optimize for improved durability and patient safety.

Three-dimensional printing continues to break boundaries, including the boundary of the body itself. Researchers at the California Institute of Technology have developed a technique that uses ultrasound to turn a liquid injected into the body into a gel in 3D shapes. The method could be used one day for delivering drugs or replacing tissue.

Overall, the field is moving quickly toward personalized treatment plans that are closely adapted to each patient’s unique needs and preferences, made possible by the precision and flexibility of 3D printing.

Anne Schmitz, Associate Professor of Engineering, University of Wisconsin-Stout and Daniel Freedman, Dean of the College of Science, Technology, Engineering, Mathematics & Management, University of Wisconsin-Stout. This article is republished from The Conversation under a Creative Commons license. Read the original article.

The Conversation is an independent source of news and views, sourced from the academic and research community. Our team of editors work with these experts to share their knowledge with the wider public. Our aim is to allow for better understanding of current affairs and complex issues, and hopefully improve the quality of public discourse on them.

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Trump admin lifts hold on offshore wind farm, doesn’t explain why

department of Interior, empire wind, Energy, offshore wind, Science, wind energy / Tim Belzer / May 21, 2025

On Monday, however, the company announced that the hold had been lifted and construction would resume. But as with the hold itself, the reasons for its end remain mysterious. The Bureau of Ocean Energy Management page for the project was only updated with a new letter on Tuesday. That letter indicates a review of its approval is ongoing, but construction can resume during the review.

The Department of the Interior has not addressed the change and has not responded to a request for comment. A post by Interior Secretary Burgum doesn’t mention Empire Wind but does suggest the governor of New York will approve a pipeline: “I am encouraged by Governor Hochul’s comments about her willingness to move forward on critical pipeline capacity.”

That suggests there was a deal that allowed Empire Wind to resume construction in return for a pipeline for fossil fuels. The New York Times suggests that this is a reference to the proposed Constitution Pipeline, which was planned to move natural gas from Pennsylvania to eastern New York but was cancelled in 2020 due to state opposition.

However, Governor Kathy Hochul has not commented about a willingness to move forward with any pipelines. Instead, Hochul’s statement on Empire Wind is very vague, saying that she “reaffirmed that New York will work with the Administration and private entities on new energy projects that meet the legal requirements under New York law.”

So while it’s good news that construction on Empire Wind has restarted, the whole process has been problematic, driven by apparently arbitrary decisions that the government has refused to justify.

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Biotech company Regeneron to buy bankrupt 23andMe for $256M

23andme, DNA, genetic data, health, Policy, regeneron, Science / Rejus Almole / May 20, 2025

Biotechnology company Regeneron will acquire 23andMe out of bankruptcy for $256 million, with a plan to keep the DNA-testing company running without interruption and uphold its privacy-protection promises.

In its announcement of the acquisition, Regeneron assured 23andMe’s 15 million customers that their data—including genetic and health information, genealogy, and other sensitive personal information—would be safe and in good hands. Regeneron aims to use the large trove of genetic data to further its own work using genetics to develop medical advances—something 23andMe tried and failed to do.

“As a world leader in human genetics, Regeneron Genetics Center is committed to and has a proven track record of safeguarding the genetic data of people across the globe, and, with their consent, using this data to pursue discoveries that benefit science and society,” Aris Baras, senior vice president and head of the Regeneron Genetics Center, said in a statement. “We assure 23andMe customers that we are committed to protecting the 23andMe dataset with our high standards of data privacy, security, and ethical oversight and will advance its full potential to improve human health.”

Baras said that Regeneron’s Genetic Center already has its own genetic dataset from nearly 3 million people.

The safety of 23andMe’s dataset has drawn considerable concern among consumers, lawmakers, and regulators amid the company’s downfall. For instance, in March, California Attorney General Rob Bonta made the unusual move to urge Californians to delete their genetic data amid 23andMe’s financial distress. Federal Trade Commission Chairman Andrew Ferguson also weighed in, making clear in a March letter that “any purchaser should expressly agree to be bound by and adhere to the terms of 23andMe’s privacy policies and applicable law.”

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Space Force official: Commercial satellites can do a lot more than we thought

Science, Space / Paul Patrick / May 20, 2025

“So, we’re off working now with that program office to go start off a more commercial line,” Purdy said. “And when I say commercial in this particular aspect, just to clarify, this is accomplishing the same GSSAP mission. Our operators will fly the GSSAP system using the same ground systems and data they do now, but these would be using faster, commercial build times… and cheaper, less expensive parts in order to bring that together in a faster sense.”

An artist’s illustration of two of the Space Force’s GSSAP surveillance satellites, built by Northrop Grumman. Credit: US Space Force

The next-gen GSSAP spacecraft may not meet the same standards as the Space Force’s existing inspector satellites, but the change comes with benefits beyond lower costs and faster timelines. It will be unclassified and will be open to multiple vendors to build and launch space surveillance satellites, injecting some level of competition into the program. It will also be eligible for sales to other countries.

More for less with GPS

There’s another area where Purdy said the Space Force was surprised by what commercial satellite builders were offering. Last year, the Pentagon used a new “Quick Start” procurement model authorized by Congress to establish a program to bolster the GPS navigation network, which is run by the Space Force but relied upon by commercial users and private citizens around the world.

The Space Force has more than 30 GPS satellites in medium-Earth orbit (MEO) at an altitude of roughly 12,550 miles (20,200 kilometers). Purdy said the network is “vulnerable” because the constellation has a relatively small number of satellites, at least relative to the Space Force’s newest programs. In MEO, the satellites are within range of direct-ascent anti-satellite weapons. Many of the GPS satellites are aging, and the newer ones, built by Lockheed Martin, cost about $250 million apiece. With the Resilient GPS program, the Space Force aims to reduce the cost to $50 million to $80 million per satellite.

The satellites will be smaller than the GPS satellites flying today and will transmit a core set of signals. “We’re looking to add more resiliency and more numbers,” Purdy said.

“We actually didn’t think that we were going to get much, to be honest with you, and it was a surprise to us, and a major learning [opportunity] for us, learning last year that satellite prices had—they were low in LEO already, but they were lowering in MEO,” Purdy said. “So, that convinced us that we should proceed with it. The results have actually been more surprising and encouraging than we thought.

“The [satellite] buses actually bring a higher power level than our current program of record does, which allows us to punch through jamming in a better sense. We can achieve better results, we think, over time, going after these commercial buses,” Purdy said. “So that’s caused me to think, for our mainline GPS system, we’re actually looking at that for alternative ways to get after that.”

Maj. Gen. Stephen Purdy oversees the Space Force’s acquisition programs at the Pentagon. Credit: Jonathan Newton/The Washington Post via Getty Images

In September, the Space Force awarded four agreements to Astranis, Axient, L3Harris, and Sierra Space to produce design concepts for new Resilient GPS satellites. Astranis and Axient are relatively new to satellite manufacturing. Astranis is a pioneer in low-mass Internet satellites in geosynchronous orbit and a non-traditional defense contractor. Axient, acquired by a company named Astrion last year, has focused on producing small CubeSats.

The military will later select one or more of these companies to move forward with producing up to eight Resilient GPS satellites for launch as soon as 2028. Early planning is already underway for a follow-on set of Resilient GPS satellites with additional capabilities, according to the Space Force.

The experience with the R-GPS program inspired the Space Force to look at other mission areas that might be well-served with a similar procurement approach. They settled on GSSAP as the next frontier.

Scolese, director of the NRO, said his agency is examining how to use commercial satellite constellations for other purposes beyond Earth imaging. This might include a program to employ commercially procured satellites for signals intelligence (SIGINT) missions, he said.

“It’s not just the commercial imagery,” Scolese said. “It’s also commercial RF (Radio Frequency, or SIGINT) and newer phenomenologies as where we’re working with that industry to go off and help advance those.”

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