"Thanks to the James Webb Space Telescope, astronomers have been given a glimpse of the mechanisms that supermassive black holes use to feed themselves," reports Space.com: The powerful cosmic titans get really puzzling when astronomers using the JWST spot them before the universe was even 1 billion years old. That's because the mechanisms by which black holes devour matter to grow and then merge to create even more massive black holes should take at least 1 billion years to achieve supermassive status. This is even more confusing because theories also say the most ravenously feeding black holes (and thus the fastest growing) should also push the matter they use for this growth away, in effect putting themselves on a diet. So, with all this in mind, how did supermassive black holes grow so rapidly in the early universe?

One explanation suggests supermassive black holes push away gas, starving themselves as predicted, but also that this matter eventually cools and falls back to the black hole. That would allow for another period of feeding and thus growth. This explanation further suggests that as this gas cools down, it forms "streamers," or filaments, of gas just a few hundred light-years wide but which stretch thousands of light-years long. These would fall back to the center of the galaxy and form a swirling disk around its incumbent black hole, once again feeding it and triggering a new period of growth. This would then restart the jets from the black hole, which would again cut off the cosmic titan's food supply, allowing the whole process to begin once more. The process would in essence be a self-regulating cycle of feasting followed by fasting. However, the connection between these filaments and supermassive black holes has been elusive, meaning this mechanism has resisted confirmation.

To solve the mystery of feasting black holes, the JWST turned its attention to a relatively close AGN situated at the heart of the central galaxy of the Centaurus Cluster, NGC 4696, located just 145 million light-years from Earth. The Hubble Space Telescope previously studied this galaxy, uncovering a strange, hook-shaped swirl of gas near the central supermassive black hole of NGC 4696. The JWST followed up this discovery by producing a detailed map of gas flowing at the heart of the galaxy. This revealed the hook-shaped feature is around 800 light-years wide and is composed of gas moving at incredible speeds of around 1.3 million miles per hour (600 kilometers per second). More excitingly, the swirl of gas appears to be connected to a vast filament of material falling in toward the central supermassive black hole.

The team tested the JWST observations against a computer simulation, finding gas in the infalling filament scenario would indeed take a shape similar to that seen in NGC 4696. "JWST is now showing us the final link of this closed loop," team member Helen Russell of the School of Physics and Astronomy at the University of Nottingham in the U.K. said in the statement. "The vast filamentary network of gas flows ultimately funnels gas down to a disk that fuels the black hole."

The team's research was published on Wednesday (July 16) in the Astrophysical Journal Letters.
"We are finally seeing this self-sustaining cycle in action," team leader Julie Hlavacek-Larrondo of the Université de Montréal said in a statement.

Launched in 2006, NASA's New Horizons probe flew by the planet Pluto in 2015. But this week it "awakened from its longest sleep ever," reports CNN. It's now 5.9 billion miles (9.5 billion kilometers) from Earth... NASA's New Horizons spacecraft went into a planned hibernation mode on August 7, 2025, and woke up on June 23 using commands stored on its main computer. The mission's flight controllers at the Johns Hopkins University's Applied Physics Laboratory in Laurel, Maryland, confirmed that New Horizons is in great shape and ready to transmit a stream of science data gathered during hibernation from its location in the region of icy objects known as the Kuiper Belt.

Pluto is the largest of thousands of frozen, rocky bodies called trans-Neptunian objects, or TNOs, that exist in the Kuiper Belt at the edge of our solar system — remnants from its formation 4.5 billion years ago... The spacecraft is capturing data about the rotation rates, orientations and shapes... The measurements provide insights into how planets are born from dust and pebbles, said Pontus Brandt, New Horizons project scientist at the Johns Hopkins Applied Physics Laboratory. "There seems to be more paired, snowman-shaped bodies, like Arrokoth, out there than anyone expected," Brandt wrote in an email. "Are such binaries the most common planetesimal and is this how larger planets have been built in our own and other stellar systems? These are very deep questions that New Horizons can help answer."

The spacecraft also measures the distribution of gas in the outer heliosphere, the expansive, protective bubble formed by a steady stream of particles that release from the sun called the solar wind. Meanwhile, an instrument called the Pluto Energetic Particle Spectrometer Science Investigation is measuring galactic cosmic rays, extremely fast particles created when stars explode. The particles pose one of the more severe threats for human activities in space, Brandt said, but the boundary of the heliosphere acts as a shield to protect our solar system from 70% of them. New Horizons' data could help scientists learn more about how this puzzling shielding works, he said.

Another instrument, the Venetia Burney Student Dust Counter, has collected data that has thrown New Horizon's team a curveball, Brandt said. The team expected dust abundance to be high within the Kuiper Belt due to the significant presence of small objects. But New Horizons has traveled beyond the known boundary of the Kuiper Belt — and it's still in a dusty environment.

An anonymous reader quotes a report from Ars Technica: As smoke from hundreds of burning wildfires spread across Canada and the United States, the first three operational satellites in the Google-backed FireSat program successfully launched into orbit. The satellites will begin providing wildfire detection capable of spotting even small fires in the United States, Australia, and Europe before the end of the year. The launch of the microsatellites aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base in California on July 7, 2026 marks a transition to "initial operational capability" for the FireSat constellation managed by the nonprofit Earth Fire Alliance. After a three-month testing period, the three satellites will begin actively providing data to fire agencies while covering every fire-prone region on Earth at least twice per day.

FireSat represents the first satellite constellation purpose-built for detecting wildfires, including spotting smaller fires that other satellites may miss. The satellites were designed by California-based satellite manufacturer Muon Space and have received over $15 million from Google to support initial deployment. Other notable financial supporters include the Bezos Earth Fund that committed $26 million. Each satellite is equipped with multispectral imaging that can peer through smoke and clouds and detect fires as small as five by five meters -- about 16 by 16 feet. That capability was proven by a FireSat Protoflight satellite that launched in March 2025 and collected more than one million images, while showing it could detect low-intensity blazes invisible to existing satellites.

The "early adopter" organizations that will start using FireSat data this year include fire agencies in California, Colorado, Australia, and Portugal. As more satellites launch, the FireSat program aims to provide the latest imagery anywhere in the world on an hourly basis by 2029. Such imagery would eventually become available every 20 minutes once the full constellation of more than 50 satellites is launched by the early 2030s. Detection of small wildfires before they burn out of control could prove extremely helpful. The Earth Fire Alliance has projected that even an hourly revisit rate by the FireSat constellation could help save more than $1 billion in fire damage costs and prevent nearly 22 million tons of carbon emissions, along with protecting 3,500 homes and 1.3 million acres of land.

To assist with that capability, Google Research plans to use the company's AI models to compare operational FireSat data with historical images in order to accurately identify very small fires and to inform predictive modeling of wildfires. Google celebrated the launch of the first operational FireSat satellites by describing the event as "another tangible step forward in putting practical AI to work for climate resilience."

Researchers say a meteorite that crashed through the roof of a Hillsborough, New Jersey, home in 2024 contains unusually pristine evidence of salty fluids and organic chemistry from near the surface of a primitive asteroid. "A forensic study of the fragments revealed that they contained preserved bits from near the surface of a primitive asteroid, where it experienced concentrated salty fluids -- a process not previously known from this type of protoplanet world," said lead author and meteor astronomer Peter Jenniskens of the SETI Institute and NASA's Ames Research Center in California's Silicon Valley. Phys.org reports: According to paper co-author Mike Zolensky, a meteoriticist at NASA's Johnson Space Center in Houston, analysis of the Hillsborough meteorite found fragments that were more extensively altered by water on the meteorite's parent asteroid than is typically seen in CM2 carbonaceous chondrites. The analysis classified the specimen as a CM1/2 carbonaceous chondrite, an intermediate classification between petrographic types CM1 and CM2. [...] Zolensky and colleague JangMi Han found small salt-rich CM1 fragments within the Hillsborough meteorite, suggesting they originated from a near-surface region of the parent asteroid where liquid water evaporated and concentrated salts. They are now working to identify the salt minerals for comparison with similar phases found among samples returned to Earth from asteroids Ryugu and Bennu.

The high concentration of salt in briny fluids can potentially create molecules crucial to life on Earth. Brines allow phosphate to remain in solution and can catalyze chemical reactions between organics and precipitate minerals. "Isotope studies of carbon and nitrogen suggest that primitive carbonaceous chondrites, including CM types, delivered organic matter to the early Earth," said cosmochemist Queenie Chan of Royal Holloway University of London, England, and biogeochemist Nana Ogawa of the Biogeochemistry Research Center at the Japan Agency for Marine-Earth Science and Technology. "The Hillsborough meteorite contained 1.8% by weight of carbon and 0.07% of nitrogen, and had carbon and nitrogen isotopes typical for CM-type meteorites."

The meteorite contained a wide variety of soluble organic compounds, and its compositional range confirms that the Hillsborough meteorite was more altered by water than most other CM-type meteorites. "A high fraction of compounds were the product of organic chemistry with minerals," said organic mass spectrometry specialist Phil Schmitt-Kopplin of Technical University Munich. "We do not know if these magnesium organic compounds were contributed by brine chemistry or were simply left over from earlier impact shock processes." In living organisms, organometallic compounds are found in blood and used in photosynthesis. Among the soluble organic compounds were many amino acids, similar to those found in more moderately altered CM2 chondrites.

Astrobiologist Danny Glavin of NASA's Goddard Space Flight Center in Greenbelt, Maryland, and his team in Goddard's Astrobiology Analytical Lab concluded that the delivery of amino acids, carboxylic acids and other soluble organic molecules by CM-type bodies may have contributed to the prebiotic organic inventory that preceded the emergence of life on Earth. Their analysis suggests the complex distribution of amino acids observed in the Hillsborough meteorite formed within the parent body, likely assisted by brine fluid chemistry. The findings have been published in the journal Science Advances.

An anonymous reader quotes a report from the New York Times: Australia will require large data centers powering artificial intelligence to generate as much power as they consume, and ensure that creative professionals retain control over work that may be used to train A.I. systems, as the government sets up guardrails over the rapidly growing industry. The announcements on Wednesday in a speech by Prime Minister Anthony Albanese came as Australia draws significant interest from A.I. companies because of its size and the availability of renewable energy, and as resistance to data centers builds in many parts of the United States and Europe.

Major A.I. companies have opened offices or announced investments in Australia in recent months. The Australian government is trying to balance capitalizing on the A.I. boom with setting parameters on a fast-changing industry that has sparked backlash over environmental impacts, energy use and lack of contribution to local economies. "Every country on earth is grappling with these challenges right now. Australia will be the first country in the world to bring these issues into a single, national framework," Mr. Albanese said Wednesday, laying out the standards his government will pursue.

The details of what exactly the requirements will look like and how they will be enforced remain to be seen, and the government will need to secure the backing of individual states for its plan. The government said it would introduce legislation on the standards early next year, and establish an "Office of A.I." directly reporting to the prime minister to coordinate implementation. The "Australian Standards for A.I." will include a "legal obligation" for companies to ensure they do not drain the power grid and be as water efficient as possible, the government said. Mr. Albanese also said creators of books, music, art or news in Australia should retain control of the price and value of their work when used to train artificial intelligence systems. "Anything less is theft," he said. "No country has got this right yet."

Astronomers have directly detected helium in the atmosphere of LHS 1140 b, a rocky exoplanet 48 light-years away that sits in its star's habitable zone. The finding marks the first confirmed atmosphere around a rocky, Earth-like planet in the habitable zone, strengthening the case that some planets orbiting red dwarfs can retain atmospheres and potentially support liquid water. "We have actually detected directly the helium present in the atmosphere itself, and that's the first direct detection for any rocky exoplanet, which is really exciting ... and then there's this added bonus that it's in the habitable zone, which is super exciting for astrobiology and habitability and searching for life," lead author Collin Cherubim, who recently earned his Ph.D. from Harvard University, told Space.com. "It feels kind of surreal." From the report: This exoplanet, or planet outside of our solar system, was first discovered in 2017 by a team led by astronomer Jason Dittmann who is now a co-author on this new discovery. "This planet was found like 10 years ago, and we're just now saying, okay, that's an atmosphere," Dittman told Space.com. "We're slowly narrowing the gap and checking these boxes ... we're finding a planet that's rocky, a planet that's of the right temperature and now ... it's like okay, we finally found one that has an atmosphere."

And being a rocky planet, "there's definitely a surface ... it's made of rocks," Dittman said. What does the planet's surface look like? We can't say yet, but the researchers who found this planet's atmosphere think there's a good chance it could have water. While it orbits a red dwarf star, which is smaller and cooler than the sun, it orbits closer than we do to our star, maintaining a temperature that keeps the planet in the "Goldilocks zone" where liquid water could exist on its surface. "It probably also has a lot of water," Cherubim said. "If it has some amount of atmosphere that can provide a bit of a greenhouse effect, which we know that it does now ... it will very likely be what we consider to be habitable conditions on Earth, and conditions that would likely support liquid water."

So is it Earth-like? While it's certainly not an Earth copy, this planet can be considered Earth-like in two main ways, Cherubim shared. One: its overall composition. The planet is rocky, likely with an iron core and (now we know) it has an atmosphere. And two: the planet's temperature is just right for liquid water, which is necessary for life at least as far as we understand it on our planet. [...] "I'm not claiming this planet has life," Cherubim made clear. With further investigation, scientists could better understand what else might be in this planet's atmosphere, and they could confirm if it has water. Further observations might not be able to confirm habitability or identify any life on the planet, but they could at least help us to better understand planets like this. The findings have been published in the journal Science.

Astronauts on SpaceX's Fram2 mission successfully captured diagnostic X-ray images in orbit for the first time. The milestone gives space medicine a second imaging option beyond ultrasound and could help future crews diagnose injuries, inspect equipment, and support longer missions to the moon or beyond. Popular Science reports: Commercial off-the-shelf X-ray machines like the ice cooler-sized MinXray TR90BH now allow users to perform scans on subjects far away from traditional facilities. In 2022, [Mayo Clinic researcher Sheyna Gifford] assisted in preparing a crew to successfully generate digital X-rays while experiencing microgravity during a parabolic flight. Gifford's team then spent years collaborating with SpaceX to plan another feasibility study. This time, they didn't want to operate an X-ray machine aboard an aircraft simulating the conditions in space -- they intended to use the equipment during an orbital mission.

The process was detailed in a recently published study in the journal Radiology, and focuses on last year's Fram2 mission. Instead of days of medical training, astronauts spent only four hours learning how to use their portable radiography device. They then took preflight X-rays of a hand, forearm, chest, abdomen, and pelvis ahead of their SpaceX Falcon 9 rocket launch on March 31, 2025. Once in orbit, the team calibrated the system before testing their MinXray on the same body parts as well as a smartwatch.

Once the crew returned, a trio of independent radiologists reviewed the orbital X-ray images based on their positioning, spatial and contrast resolutions, and general scan quality. Although positioning scores were slightly decreased for the central body images, every other scan held up to similar examples created on Earth. Meanwhile, the astronauts reported that using the machine was easy despite minimal prior coaching. Looking ahead, researchers hope to conduct further X-ray tests during orbital missions, while continuing to reduce the overall size of equipment.

Astronomers have detected erythrulose, a sugar found in raspberries and self-tanners, in a gas cloud near the center of the Milky Way. While not essential for life itself, the molecule can convert into a form thought to be important for life's origins, adding evidence that key prebiotic ingredients may be widespread across the galaxy. The Associated Press reports: Using two dish-shaped radio telescopes in Spain, researchers collected data from a large gas cloud near the center of the Milky Way. They identified the sugar in gas form by comparing telescope signals to samples in the lab. It's the latest kind of sugar detected in space -- in a region crossed by NASA's twin Voyager, the farthest spacecraft to ever travel from Earth.

Scientists have found interesting chemistry in our galaxy, including building blocks for genetic material and parts of the cell. They spotted a cousin to table sugar near the center of the Milky Way about 25 years ago, and black grains from asteroid Bennu retrieved by NASA's Osiris-Rex spacecraft yielded other sugars, including a key DNA ingredient. The latest sugar isn't essential for life, but can easily convert to a form that's thought to be crucial to kick-starting life on Earth. And it's one of the most complex sugars spotted so far, said astrophysicist Erika Hamden with the University of Arizona. The results were published in the journal Nature Astronomy.

Environmental groups want America's FCC "to slam the brakes on orbital datacenters," writes The Register.

They're arguing for an environmental impact assessment for what could be 1 million satellites: Earthjustice, acting on behalf of DarkSky International, Environment America, and Public Employees for Environmental Responsibility (PEER), filed a petition this week... The filing doesn't target any single company. Instead, it asks the regulator to put the entire emerging orbital datacenter sector on hold while it assesses the cumulative effects of proposals from SpaceX, Starcloud, Blue Origin, Cowboy Space, and any similar applications that follow. According to the petition, those proposals collectively seek "well over a million datacenter satellites" in low Earth orbit.... " increasing the existing volume of satellites in low-earth orbit by multiple orders of magnitude."

The groups argue that the FCC is trying to apply licensing rules written for much smaller satellite constellations to an entirely new class of infrastructure. "If ever a situation warranted a Programmatic Environmental Impact Statement [PEIS], it is this one," the petition says. It argues that a single review would allow the agency to examine "the risks, alternatives, needs, costs, and impacts of this sudden transformation of Earth's exosphere" before deciding whether any of the projects are in the public interest. The petition raises concerns about rocket launch emissions, pollutants released as satellites burn up during atmospheric reentry, depletion of the ozone layer, orbital debris, light pollution, impacts on wildlife, and interference with astronomy.

It also argues that the combined effects of these constellations cannot be understood by evaluating applications one at a time.... "It is difficult to imagine a better example of multiple projects presenting essentially identical impacts and risks that compound synergistically and cumulatively than the present proposals..." The petition argues that the FCC's current approach, which generally treats satellite licenses as categorically excluded from detailed environmental review, is no longer fit for proposals measured not in dozens or thousands of spacecraft but in hundreds of thousands and, potentially, millions.

If the FCC agrees, orbital datacenter operators will have a mountain of paperwork to clear before sending their hardware skyward.

The FCC has approved (PDF) Reflect Orbital's Earendil-1 test satellite, which will use a 60-by-60-foot mirror to reflect sunlight back to Earth after dark. "The reflected light from the satellite is supposed to span an area about 3 miles wide on the ground," reports PCMag. It comes despite objections from astronomers and environmental groups who are concerned that the satellites will unleash intrusive light pollution. From the report: The approval is only for one satellite, dubbed Earendil-1, which is meant to test Reflect Orbital's technology for shining sunlight back to Earth. The satellite will boast a steerable thin-film reflector measuring about 60 feet by 60 feet, with the goal of powering solar farms at night or illuminating disaster-struck areas after dark to help rescue teams. Reflect Orbital envisions operating over 50,000 satellites by 2035, effectively surrounding the Earth with a fleet of mirrors. The proposal has faced stiff pushback from environmental groups and astronomers who are concerned that the satellites will unleash intrusive light pollution. The opposition has been so strong that the FCC received over 1,800 public comments on the application, many of them objecting to Reflect Orbital's plan for Earendil-1.

[...] [T]he FCC approved the satellite, noting the grant is only "for a single demonstration satellite" to test an innovative technology that could advance American leadership in space. "The Communications Act states that it is the policy of the United States to 'encourage the provision of new technologies and services to the public,' and Reflect Orbital's demonstration satellite is an example of a potentially groundbreaking technology that the Commission has found is in the public interest to support," the order says. But on the most controversial aspect of the satellite, the FCC said the concerns around Reflect Orbital's solar reflector are "unrelated to the Commission's role in authorizing use of radiofrequency spectrum, and even if the Commission had authority to review and condition these operations (which it does not), these harms are unlikely to occur.

In addition, the commission said that U.S. courts have blocked the FCC from using "a generalized public interest requirement beyond its statutory authority in regulating communications. Accordingly, the operations of a solar reflector in space would not be reviewed as part of the Bureau's public interest analysis." The regulator also noted that conducting an environmental review for the satellite went beyond its authority. Even if the FCC did have the power, the commission emphasized that the grant is for a single satellite, not 50,000. "The majority of these comments focus on a hypothetical plan to deploy tens of thousands of satellites, and those who argue the single satellite will harm the human environment do not demonstrate with specificity the potential harm will be caused by the single satellite, but rather rely on the same studies as the commenters objecting to a larger constellation," the FCC adds.

China successfully recovered an orbital rocket booster for the first time, landing the Long March 10B's first stage into a net-equipped sea platform after its maiden launch. "This mission marks my country's first successful controlled recovery of a launch vehicle and the world's first network-based recovery of a launch vehicle," the China Aerospace Science and Technology Corporation (CASC) announced via social media shortly after the launch. (Translation by Google.) "It signifies a historic breakthrough for my country in the field of reusable rocket technology and will lay a solid foundation for accelerating the improvement of my country's space access capabilities." Space.com reports: The Long March 10B is a two-stage rocket that stands about 207 feet (63 meters) tall, according to the state-owned CASC, the main contractor for China's space program. The vehicle's first stage burns kerosene and liquid oxygen (LOX) propellants, whereas the second stage uses LOX and liquid methane. In reusable mode, the Long March 10B can loft about 16 tons of payload to low Earth orbit.

And the rocket flew with a payload on its debut liftoff -- a satellite that successfully reached "its predetermined orbit," according to the CASC update. That post did not provide any details about the spacecraft or its orbit. It did give a brief rundown of the first-stage recovery, however. "Approximately 6 minutes after the first and second stages separated, the first stage returned vertically and was successfully recovered at a sea-based recovery platform using a net system," CASC officials wrote, noting that launch occurred from the Hainan Commercial Space Launch Site on Friday at 12:15 a.m. EDT (0415 GMT; 12:15 p.m. Beijing time.) "The launch and first-stage recovery missions were a complete success."

A new study proposes using shoebox-sized detector satellites to sniff out nuclear weapons launched by adversary nations. The idea is aimed at addressing fears that a space-based nuclear detonation could destroy satellites across low Earth orbit and make some orbits unusable for years. Space.com shares the findings from a new paper authored by Areg Danagoulian, an associate professor of nuclear science and engineering at the Massachusetts Institute of Technology: No reliable way currently exists to detect and defuse a nuclear bomb in space. Danagoulian proposes a constellation of small "9U" cubesats, each one about the size of a large shoebox and each carrying a special detector capable of sensing radiation emitted by unexploded nuclear bombs. He explores a scenario in which Russia launches a suspected space nuke into an orbit with an altitude of 1,200 miles (2,000 km). That number is not random. In 2022, Russia's Kosmos 2553 satellite, orbiting at that exact altitude, triggered suspicions it might be testing components for a future orbital nuclear weapon.

Russia claims the satellite just observes Earth. At that altitude, the satellite passes through the Van Allen belt, a region of intense cosmic radiation trapped by Earth's magnetic field. Most of the belt stretches between altitudes of around 600 miles (1,000 km) to tens of thousands of miles, but in some areas the radiation can reach much closer to Earth's surface. The interaction between the fissile material inside the nuke and the energetic particles from the radiation belt would create distinct signatures, Danagoulian said, which could help confirm whether a suspicious satellite carries a nuke or not.

"The thermonuclear weapon would contain a significant amount of uranium," Danagoulian said. "The high-energy protons [in the uranium] would break up when another proton is coming in and shred the nuclei. That would knock out a large number of neutrons. This interaction turns that device into a very intense neutron source that otherwise would not be there." he process is known as proton-induced neutron spallation, which essentially means the ejection of fragments from material triggered by impacts of protons. The detector satellite Danagoulian proposes would have to be able to get quite close to the suspect spacecraft -- a few kilometers.

The inspector spacecraft would carry a sensor combining two types of detectors. At the heart of the device is a neutron scintillator, which detects all incoming neutrons and protons. Around it is a "cage of diamond" detector that detects only neutrons -- not protons. Such a set-up helps filter out the particles present in the environment naturally, said Danagoulian. In addition, by using two "planes of neutron detectors," the sensor can determine the direction from which the neutrons arrived. "If the external diamond detector triggers and gives a signal, you can ignore the particle, because it's most likely a proton and not a neutron," said Danagoulian. "Once you identify those neutrons, by having those two detections, you can back project and find out where the neutron came from."

Danagoulian says such a nuke sniffer would have to be launched into an orbit aligned with that of the suspicious satellite and creep up as close as 2.5 miles (4 km) from it. It would then take about a week to gather enough measurements to confirm whether the object is hiding a nuke or not. A constellation of 10 such satellites could reduce the process to mere hours, Danagoulian said. If a nuke were detected, the military could then try to jam the satellite's communications link from the ground, making it impossible for the adversary to remotely detonate the bomb. There is currently no technology available to safely defuse a nuclear weapon in space. [...] Danagoulian also suggests that high-grade radiation hardening could improve satellites' chances of surviving a nuclear winter in space. The paper has been published in the journal Nature.

New Zealand startup Zenno Astronautics has completed the first orbital test of its "Supertorquer," a shoebox-sized superconducting magnet system that uses solar power and Earth's magnetic field to help control a satellite without fuel. The company says the technology could eventually support fuel-free satellite maneuvers, docking, deep-space trajectory changes, and even magnetic radiation shielding for astronauts. Space Magazine reports: The tests began shortly after Mira's launch in November last year aboard the SpaceX Transporter 12 mission and saw the shoebox-size device perform with flying colors, Zenno Astronautics CEO and founder Max Arshavsky, told Space.com. "It's a technology that allows a spacecraft to not tumble violently in space and point in the right direction," Arshavsky said. "The unit has multiple super-conducting magnets that are positioned in different axes. When we power up the magnets, they generate a magnetic field, which interacts with Earth's magnetic field, and because we can control the magnetic field on the satellite, we can control the way in which it turns with respect to Earth."

Superconducting magnets are made of coils of superconducting wire that have zero electrical resistance and can therefore conduct much larger currents than normal wires. That larger current translates into a greater magnetic force. There is, however, a catch: Superconducting materials need to be cooled to extremely low temperatures to gain their wonder properties. [...] The unit housing the superconducting magnets is wrapped in layers of insulation and fitted with a heat pump that removes all the excess heat from the system. Every time the satellite needs a push, the superconducting coils power up, drawing energy from a battery charged by the satellite's solar panels.

"It's converting solar energy straight into useful work," Arshavsky said. "Energy is the one thing that is abundant in space, and you can use it to energize the magnet to create a magnetic acceleration device. It gives you acceleration without fuel." In the future, Zenno Astronautics plans to launch larger systems that could enable spacecraft to dock in space or conduct close proximity operations using just the power of their solar-powered superconducting magnets. Arshavsky envisions powerful magnets that could, in the future, propel spacecraft on missions to the moon and Mars using only solar power.

Japan's Hayabusa2 probe captured rare close-up images of near-Earth asteroid Torifune, revealing a snowman-like shape made of two joined lobes. Phys.org reports: The fridge-sized Hayabusa2 skimmed asteroid Torifune on Sunday in a mission that demonstrated the ability to deflect a potentially dangerous space rock away from Earth. A new image released by the Japan Aerospace Exploration Agency (JAXA) on Monday could aid such efforts, as researchers say near-Earth asteroids vary in their size, shape and surface characteristics.

"The moment I actually saw this image and the scientific data -- it really gave me goosebumps," JAXA scientist Yuya Mimasu told reporters, adding the asteroid "personally looked like a snowman." The black-and-white image, captured by a telescopic camera, showed what appeared to be two round objects joined together. "You can actually see the rocks... I really hadn't expected to be able to take a photo like this, so I'm absolutely over the moon," he said.

[...] Moving at a speed of more than 18,000 kilometers (11,185 miles) per hour, the probe was due to fly within 800 meters (2,625 feet) of the asteroid, but JAXA said it would analyze the distance later. If confirmed, the mission would be one of the closest flybys of a near-Earth asteroid ever. JAXA also said Monday it succeeded in acquiring data from three other devices that can measure the distance from the asteroid and examine the existence of water.

Startup Ampera has unveiled what it calls the first 3D-printed nuclear reactor module, built around a silicon-carbide core and pressure vessel designed for a thorium-based microreactor. The company says future systems could deliver 15 or 30 megawatts for up to 30 years without refueling. When The Register asked about availability, their spokesperson said: "We expect the power generation portion of the system to be available as early as 2027, with the nuclear module being available to customers about 2030 based on regulatory approval." From the report: Founder and CEO Brian Matthews revealed the prototype microreactor, which features a fully 3D-printed silicon carbide reactor core and pressure vessel. "This next-generation nuclear core and pressure vessel sets the foundation for factory-built, mass-produced nuclear energy," Matthews said. "The advanced technology and additive manufacturing used demonstrate a clear commercial path for new nuclear technology coming to market in an accelerated manner." His company is developing a subcritical, solid-state, factory-built thorium-based nuclear reactor. Subcritical means the fuel cannot sustain a nuclear chain reaction on its own, which prevents a runaway power excursion.

Ampera uses "solid-state" to describe a design with solid rather than liquid fuel. The proposed fuel uses tristructural isotropic, or TRISO, particles, consisting of a fuel kernel containing thorium, surrounded by multiple ceramic and carbon layers. [...] "Thorium is the future for ultra-safe, clean power production," Matthews said at the time. "By producing TRISO thorium kernels in the United States, we can ensure ample access to the needed fuel supply as we scale up and also minimize price volatility risk."

Ampera also describes the heart of the reactor as as a spherical monolithic gyroid core. A gyroid, as far as we can fathom, is a complex shape that provides a massive surface area relative to its volume, making it well-suited for heat transfer. Its complexity makes it difficult to produce using conventional manufacturing methods, which is where additive manufacturing comes in. The core is 3D-printed using silicon carbide and designed to operate for up to 30 years without refueling, the firm claims. Ampera says its planned systems will provide 15 or 30 MWe, depending on the configuration, enough to supply a typical datacenter. Larger configurations are planned. Matthews said that his company expects to be the first to industrialize factory-built nuclear power with near-term deployment timelines.

Amazon says its Leo satellite network now has enough spacecraft in orbit to begin limited commercial internet service, with 396 satellites providing "continuous service across initial latitudes." Early performance will likely be uneven, however, and well behind Starlink. "It'll be years before Amazon can boast similar performance numbers as it continues to launch a planned 3,232 Leo satellites," reports The Verge. From the report: SpaceX went live with its "Better than nothing beta" back in 2020 when it had almost 900 satellites operating in low-Earth orbit. It initially served a narrow band of users in the upper US and Canada, who complained about frequent service interruptions and high sensitivity to obstructions, with speeds between 50Mbps and 150Mbps, and latency from 20ms to 40ms. By 2022, the service and coverage areas had already dramatically improved. [...]

SpaceX currently has over 10,000 Starlink satellites in operation, providing robust internet connectivity on land, sea, and air in over 160 countries. Performance varies by the dish, service level paid for, time of day, and location of the user, but we're now talking 200Mbps median download speeds, 10Mbps to 40Mbps uploads, and latency hovering around 25ms.

IEEE Spectrum argues that orbital data centers remain far from economically or technically practical despite Elon Musk's prediction that space will become the cheapest place to run AI within a few years. Deploying SpaceX's proposed million-satellite constellation would require enormous increases in launch and manufacturing capacity, while cooling, radiation, maintenance, latency, orbital debris, and astronomical interference present major unresolved obstacles. Longtime Slashdot reader xetdog shares the report: Consider this: There are roughly 14,500 active satellites in orbit. Musk's Starlink constellation accounts for about two thirds of those. Both the launch cadences and satellite-manufacturing capacity would have to scale up astronomically to deploy a million orbital data center satellites. For context, there have been roughly 7,000 orbital launches in all of human history. To loft 1 million satellites into low Earth orbit on SpaceX's Starship, which is designed to carry up to 60 satellites per vehicle, would require 16,666 launches exclusively devoted to satellite deployments. Considering that SpaceX launched a record 165 orbital missions in 2025, even at 10 times that cadence, it would take a decade. And how long would it take to build 1 million satellites, given Starlink's current pace of around 4,000 per year and a generous tenfold increase in capacity? Short of a manufacturing revolution, try 25 years. Dissipating heat in space also requires enormous radiators. As IEEE Spectrum editor Dina Genkina noted, startup Starcloud has sent only one Nvidia H100 GPU into orbit, and "their radiator was too weak to let the chip run at full power." A single 700-watt H100 would require about 1.4 square meters of radiator area, while a 100-megawatt data center could need 2,500 radiators measuring 80 square meters each.

So, why are the hyperscalers hyping orbital data centers? Answer: because it's lucrative. "The Elon Musk part of it is honestly genius because he's got xAI building the data centers, SpaceX sending them to space, and Tesla building solar panels," Genkina says. "It's almost like he's paying himself."

An anonymous reader quotes a report from Space.com: NASA provided an Artemis update today (June 30), announcing new lunar landing contracts for its Moon Base initiative and a surprise new possible rover mission that could be headed to the moon's south pole. During the second monthly update that NASA has provided for its moon base plans, the agency named Astrobotic, Firefly Aerospace and Intuitive Machines as the providers of four robotic landers that will deliver scientific payloads to the surface of the moon, as NASA tests and expands the technologies needed for a permanent human outpost. "This is this drawing on the playbook that worked very well for NASA during the 1960s," NASA Administrator Jared Isaacman said during the livestreamed update, explaining the experiential approach to a crewed lunar return. "We didn't just jump right to Apollo 11."

Isaacman also announced the potential repurposing of an engineering development model built to mirror the agency's Perseverance and Curiosity rovers on Mars. "There is another," Isaacman said, quoting Yoda's line from "Star Wars: The Empire Strikes Back." That test rover is called PROMISE, short for "Polar Rover for Observation, Mapping, and In-Situ Exploration" (though it was formerly known as Optimism). PROMISE was developed at NASA's Jet Propulsion Laboratory (JPL) in Southern California, where it has been used as a test platform for fixes or commands that engineers want to try on the ground before permanently sending them to Perseverance and Curiosity. Now, NASA wants to send PROMISE on a mission of its own. Though sending PROMISE to the moon would leave Perseverance and Curiosity -- both of which remain active on Mars -- without an Earth-based testbed, Isaacman thinks it would be worth it. "We've had years now of experience operating the two rovers on the surface of Mars, and we've got this hardware that the taxpayers have invested a lot in," he said. "So the question was posed: 'What if we send it to the moon?'"

With a little refurbishment, PROMISE would help advance NASA's lunar plans, Isaacman added. Like Perseverance and Curiosity, the test rover is powered by a radioisotope thermoelectric generator (RTG), which converts heat from naturally decaying radioactive material into electricity. So it wouldn't require sunlight to operate -- a real benefit on the moon, where most locations experience long stretches of darkness. (NASA plans to build its Artemis base near the moon's south pole, which is thought to harbor an abundance of water ice and also has a relatively complex lighting environment.) The other robots currently in the works to launch on future missions to the moon, including the landers announced during today's update, are all solar powered. Through 2029, NASA hopes to launch up to 20 such missions as part of the CLPS (Commercial Lunar Payload Services) initiative to support the first phase of the agency's moon base plans, and the landers announced today will be some of the first in that lineup.

An anonymous reader quotes a report from Inside Climate News: A new state law limits Florida communities' aims to offset greenhouse gas emissions that are warming the global climate and intensifying disasters such as hurricanes. Specifically, HB 1217 prohibits local governments from pursuing net-zero emissions goals. At least 10 cities and counties have implemented such policies, including Fort Lauderdale, Miami, Orlando and Leon County, where Tallahassee, the state capital, is located. But the new law will not necessarily upend these policies, said Bradley Marshall, senior attorney at Earthjustice, an advocacy group. "It's certainly meant to scare municipalities and local governments from trying to do things to further net-zero policies," he said. "Now, its exact impact and what it exactly prohibits is probably up for some debate. Things that are adjacent to it -- emissions reductions and even climate change reduction policies -- on their face will not run afoul at all of a ban on adopting a net zero policy."

The measure requires local governments to submit an affidavit annually to the state Department of Revenue verifying compliance. Gov. Ron DeSantis, a Republican, signed the measure on April 22, Earth Day, and the law will take effect July 1. It states that "net zero policies, carbon taxes and assessments, and emission trading programs are detrimental to this state's energy security and economic interests and inconsistent with the energy policy and the environmental policy of this state." [...] HB 1217 also prevents local governments from purchasing items such as vehicles or appliances based on the fuels they use or production of the items. Local governments may not participate in carbon-trading programs or use public funds to support other organizations with net-zero policies. Cities and counties also may not charge a tax or fee tied with carbon emissions. "This bill is definitely part of a larger coordinated push by the political enablers of the fossil fuel industry to obstruct any tools -- legal or legislative tools -- to hold the industry accountable for its contributions to climate change," said Laura Peterson, senior analyst at the Union for Concerned Scientists, an advocacy group. "Florida is really on the front lines. So I imagine the governor is taking this step because he sees what's coming down the pike. It's not getting better. So I can only assume that this is an effort to satisfy some of the pressures that he's getting from donors and from his party to protect the industry. And he's doing it at the expense of his constituents."

Spanish startup FOSSA Systems "has raised about $10.5 million to expand its connectivity constellation," reports Space News, noting some funding is backed by Spain's government: The support from the Spanish Society for Technological Transformation (SETT) comes a year after the fund injected 14 million euros into Spain's Sateliot , which is also developing a satellite connectivity network with security and defense applications. Spanish private investment firm Kibo Ventures led FOSSA's funding round, the six-year-old venture announced June 24, bringing its total raised to date to nearly 20 million euros.

The proceeds will help fuel FOSSA's push beyond the tiny picosatellites it once used to connect low-power monitoring devices toward larger cubesats in low Earth orbit, enabling additional sovereign communications and space-based intelligence capabilities... The company's funding round follows a wave of investments this year in European ventures planning to develop sovereign space capabilities, including Austrian propulsion startup Gate Space, which secured 6.3 million euros earlier this month from a European Commission-backed accelerator program.
"Our goal is to establish FOSSA as a European benchmark in sovereign space infrastructure," said Julián Fernández, FOSSA's CEO and cofounder.