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Guarding the Night Sky: Critics Push for Environmental Review of Space-Based Data Centers
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11.935 min•22 minutes ago
Mars as a Living Laboratory: Science‑First Missions to Seek Life
A NASA-backed Mars plan centers on survival and life-support first each sol, then science—drilling for biosignatures, tracing habitability, and testing in-situ resource use—within architectures like 30-Cargo-300 and 30-30-30 that include sample return; discussions include deep drilling, potential nuclear propulsion (SR‑1 Freedom) and autonomous crews due to long Earth–Mars communications delays, all aimed at answering whether life existed on Mars and how a sustainable outpost could work.
7.715 min•22 minutes ago
Jupiter-sized survivor orbits a cooling white dwarf, defying expectations
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Dawn Jellyfish: SpaceX's Starlink Launch Colors the Florida Sky
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NASA's fridge-sized quantum lab on the ISS expands ultracold-atom research in orbit
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Nearby ravenous black hole mirrors early-universe feeding frenzy
Astronomers observe a supermassive black hole at the center of SDSS J110546.07+145202.4 (about 1.8 billion light-years away) in a rapid accretion phase, launching jets and causing a roughly 20-fold increase in radio brightness over about eight years. The behavior resembles the vigorous feeding seen in the early universe, providing a nearby laboratory to study extreme accretion physics and jet production. The finding, published in The Astrophysical Journal (May), suggests such rapidly changing radio galaxies could help fill gaps in our understanding of early galaxy growth, with future SKA surveys expected to identify more transients.
DMS hints on a distant ocean-world exoplanet spark debate over life signals
K2-18b, a sub-Neptune about 124 light-years away, is a leading Hycean candidate that could harbor a global ocean beneath a hydrogen-rich atmosphere. Webb observations yielded two tentative signals of dimethyl sulfide, a gas commonly linked to marine life on Earth, but independent analyses question whether DMS was truly detected, leaving the existence of a biosignature on the planet unresolved and highlighting the need for more data and standardized detection criteria.
Webb detects two-faced WASP-121b: scorching dusk and cloudy dawn
JWST mapped WASP-121b’s atmosphere longitude by longitude during a single transit as the planet rotated, revealing a hotter, expanded evening limb with water dissociation and a cooler morning limb possibly hosting silicate clouds; this rotational‑transit effect shows strong day–night circulation on this ultra-hot Jupiter (dayside ~2770 K, nightside ~1000 K) and highlights how limb-averaged spectra can miss key chemistry and cloud features.
Sub-Neptunes Could Forge Oceans from Within
A Nature study shows that many planets called sub-Neptunes can synthesize their own water deep inside, by hydrogen in their thick atmospheres reacting with molten rock to produce H2O. If common, this could make water much more widespread in the galaxy and not just delivered by comets or asteroids. However, the water forms interiorly and may not always become a surface ocean, and these results are experimental/theoretical, requiring integration into formation models and observational tests to assess implications for habitability.
Titan's Methane Rivers Echo Earth's Hydrology, Flowing Through Ice
Titan, Saturn's largest moon, hosts standing surface liquid—methane and ethane—driven by a slow hydrological cycle that forms rivers, rain, lakes and seas, with bedrock of water ice and surface features mapped by Cassini-Huygens; Kraken Mare and Ligeia Mare are fed by Vid Flumina, and a Dragonfly rotorcraft mission is planned for the 2030s to study Titan up close; while Earthlike in form, Titan's cycle uses different liquids and conditions, and life as we know it is unlikely.
Cosmic ghost neutrinos whisper from ancient supernovae
Researchers analyzing 14 years of data from the Super-Kamiokande detector report a likely signal of the Diffuse Supernova Neutrino Background—the universe’s background of neutrinos from all past core-collapse supernovas—marking a potential first detection of these cosmic 'ghost' particles; if confirmed, it would illuminate how dying stars enrich their environments and form compact remnants, with plans to combine data with Hyper-Kamiokande to boost sensitivity.
New Horizons Wakes to Edge of Solar System
NASA’s New Horizons has awakened from a 321‑day hibernation about 64 astronomical units from Earth (roughly 10 billion km) and will begin sending back a year’s worth of stored data while studying the outer heliosphere’s termination shock—the boundary where the solar wind slows and blends with interstellar material. Having passed Pluto and Arrokoth, the probe is now venturing farther into the Kuiper Belt region and beyond, with no new target identified; its path could see it leaving the Kuiper Belt around 2028–2029 as it continues toward interstellar space, with an approximate nine‑hour one‑way radio link and a current “green” status from mission control.
China nails first sea-based recovery of a reusable rocket
China’s Long March-10B successfully completed its maiden flight and recovered its first-stage booster on a sea-based net, marking the country’s first controlled recovery of a reusable orbital rocket and signaling progress toward lower-cost launches alongside SpaceX and Blue Origin.
NASA's New Horizons Awakens to Return Clues from the Outer Solar System
NASA's New Horizons spacecraft has awakened from a 321-day hibernation about six billion miles from Earth, with all systems reporting green health status throughout. The probe will downlink its health data and begin transmitting science data from instruments like the Venetia Burney dust counter, Pluto Energetic Particle Spectrometer, and Solar Wind at Pluto, with the ultraviolet Alice spectrograph set to map hydrogen in the outer heliosphere in coming weeks. Launched in 2006 and famous for Pluto flybys in 2015, it is expected to continue its mission toward the Kuiper Belt through the decade.
China plots space-ground early-warning system for sunward asteroids
China's space agency announced plans to develop a coordinated space-ground asteroid early-warning network that would combine ground-based optical telescopes with a space-based observing constellation to detect near-Earth asteroids, especially those approaching from the sunward direction. The proposed architecture includes a basic model with a Sun-Earth L1 satellite plus northern and southern ground stations, and an extended model that adds Venus-like or distant retrograde orbits to improve sky coverage. The move aligns with China’s 15th Five-Year Plan, complements ongoing international efforts (e.g., NASA's DART, ESA's Hera), and emphasizes open data sharing and potential radar capabilities as gaps in current asteroid tracking persist. The development comes amid calls for stronger planetary defense and the upcoming International Year of Planetary Defense in 2029 and notable close approaches such as Apophis' flyby.