Using transmission spectroscopy, astronomers have confirmed methane in the atmosphere of TOI-199b, a Saturn-sized gas giant about 335 light-years away with a surface temperature near 79°C. That makes it the first temperate gas giant with a confirmed atmospheric methane detection, and the result aligns with existing models predicting methane should dominate at these cooler temperatures. Carbon dioxide and ammonia are also candidate molecules, though pinning down their abundances will require follow-up observations. The finding gives researchers a real-world test case for models of how planetary atmospheres form and evolve, and the team says it justifies dedicating more telescope time to similar worlds to determine whether TOI-199b is typical or an outlier.

↗Source: Universe Today

FAA environmental documents published May 29 reveal SpaceX is developing a reusable reentry vehicle called Starfall, designed for both in-space manufacturing and rapid point-to-point cargo delivery from orbit. The disk-shaped capsule is 3.1 meters wide, carries up to 1,000 kilograms of payload, and relies on parachutes for descent with no independent deorbit propulsion. SpaceX plans to mass-produce the vehicle for launch on either Falcon 9 or Starship. The FAA approved two uncrewed test splashdowns in the Pacific Ocean roughly 1,300 kilometers off the California and Mexico coasts, though no test dates are specified. If Starfall reaches commercial scale, SpaceX would compete directly with Varda Space Industries, Inversion, and Atmos Space Cargo, all of which currently depend on SpaceX rideshare launches for their own reentry vehicle programs.

↗Source: SpaceNews

A peer-reviewed modeling study submitted to the IAU's dark sky protection body finds that the more than 1.7 million satellites currently proposed for launch would substantially harm astronomical observations, even setting aside the brightest designs. The analysis draws a clear threshold: constellations staying below a visual magnitude of 7 at 550 km altitude and totaling fewer than roughly 100,000 satellites would keep sky-background pollution and field-of-view losses within acceptable limits. Beyond that, the math turns harsh. A 5,000-satellite constellation of highly reflective satellites similar to Reflect Orbital's concept would raise scattered sky brightness by 20–30%; scaling to 50,000 such satellites pushes that figure to 200–300%. AST SpaceMobile's bright satellites are flagged separately as a detector-saturation risk even at moderate numbers, with the Vera Rubin Observatory's LSST camera cited as especially vulnerable.

↗Source: arXiv astro-ph

Blue Origin's uncrewed Blue Moon Mark 1 cargo lander, named Endurance, has completed thermal vacuum testing in Chamber A at NASA's Johnson Space Center, a facility that replicates the airless, temperature-swinging conditions of the lunar surface. The test confirmed that systems, seals, and materials perform correctly under those extremes before the vehicle ever launches. Endurance is slated to deliver two NASA science payloads to the lunar South Pole region under the Commercial Lunar Payload Services program, and will also demonstrate precision landing, cryogenic propulsion, and autonomous guidance technologies that feed directly into Blue Origin's crewed Mark 2 lander for Artemis.

↗Source: Universe Today

NASA has completed its final pre-shipment inspection of the Nancy Grace Roman Space Telescope's primary mirror, a 2.4-meter silver-coated optic designed to capture near-infrared light. The telescope will now be shipped to Kennedy Space Center ahead of a September 2026 launch target. Once in orbit, Roman will operate at the Sun-Earth L2 point alongside JWST, conducting wide-field surveys of dark matter, dark energy, exoplanets via direct imaging and gravitational microlensing, and galaxy evolution. At roughly $4 billion, Roman cost about half what JWST required, and its wide field of view is designed to complement rather than duplicate what Webb does.

↗Source: Universe Today

Galaxy XMM-VID1-2075, one of the most massive known in the early universe, shows no rotation whatsoever — its stars move in random directions rather than the orderly disk pattern seen in virtually every other large galaxy. JWST's NIRSpec instrument gave astronomers the sensitivity needed to measure internal stellar motion at a distance of 12 billion light-years, something ground-based telescopes cannot do. The leading explanation is a single head-on collision between two galaxies spinning in opposite directions, their angular momentum canceling out. Current simulations allow for such objects but treat them as extremely rare, so the discovery becomes a problem only if more turn up — and astronomers are now actively looking.

↗Source: Universe Today

Blue Origin CEO Dave Limp confirmed over the weekend that teams have regained access to Launch Complex 36 following New Glenn's hotfire explosion, with a rebuild plan in place and hardware in the nearby integration facility appearing undamaged. The root cause investigation will take longer. On Capitol Hill, the House Armed Services Committee marks up the FY2027 NDAA on Thursday, the starting point for a bill that shapes Space Force funding. The administration is requesting $59 billion for the Space Force through regular appropriations, rising to $71 billion if a separate reconciliation package clears Congress. National Academies space boards are also meeting in Washington this week, with NASA officials scheduled to discuss the Ignition Program, workforce changes, and science priorities.

↗Source: SpacePolicyOnline

Naval Academy students aboard the 1931 tall ship Amerigo Vespucci are serving as research subjects for ASI's ICE-BLUE initiative, a 107-day North American voyage designed to measure how the body responds to confinement, disrupted sleep cycles, and prolonged operational stress. The data will be compared against samples from astronauts on the Axiom-3 ISS mission. Italy is one of ESA's largest exploration funders, committing €834.7 million at the November 2025 Ministerial, giving it a significant stake in Europe's ongoing debate over whether to develop sovereign human spaceflight capability.

↗Source: European Spaceflight

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