Astronomy

Space Exploration Astrophysics Planetary Science Galaxies Celestial Events Observational Astronomy Cosmology Space Missions Telescopes Solar System

NASA, MPC and IAWN Activate Planetary-Defense Monitoring for Interstellar 3I/ATLAS as Perihelion Nears

Officials say the interstellar visitor poses no threat to Earth.

3I/ATLAS Nears Perihelion Out of View as IAWN Plans Tracking Push and Europa Clipper Eyes Tail Sample

SpaceX Sets Saturday Morning Falcon 9 Launch From Vandenberg to Add 28 Starlink Satellites

ESA Stress-Tests Sentinel-1D Control With Carrington-Scale Solar Storm Drill

NASA Reopens Artemis Moon Lander Competition as Starship Slips to 2028

SpaceX Launches SpainSat NG-2 on Rare Expendable Falcon 9 After One-Day Scrub

Scientists Directly Detect Torsional Alfvén Waves in the Sun’s Corona

Scientists Detect Habitable-Zone ‘Super‑Earth’ GJ 251 c Just 18 Light‑Years Away

Last Chance Tonight to See Two Rare Green Comets Before Moonlight Dims Them

Nearby Habitable-Zone Super-Earth Candidate GJ 251 c Announced in Peer-Reviewed Study

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NASA Confirms Earth’s Temporary Quasi-Satellite as Interstellar Comet 3I/ATLAS Nears Perihelion

3-Billion-Year-Old White Dwarf Is Actively Devouring Rocky Debris, Study Finds

NASA Confirms Tiny Asteroid 2025 PN7 as Earth’s Newest Quasi-Moon

New Simulations Revive Dark-Matter Explanation for Milky Way’s Gamma-Ray Glow

Comet Lemmon Enters Peak Viewing Window for Naked‑Eye Spectacle Oct. 25–31

PNAS Study Finds Rare Water-Rich Meteorite Relics in Chang'e-6 Far-Side Samples

NASA Confirms Tiny Asteroid 2025 PN7 as Earth’s Quasi-Moon Through 2083

FCC Reviewing Startup’s Plan for Space Mirrors to Deliver Nighttime Sunlight

NASA Opens Artemis Lander Competition as Duffy Says SpaceX Is Behind

Suspected Space Debris Recovered in Western Australia Undergoes Testing