Astronomy

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

Interstellar Comet 3I/ATLAS Approaches Dec. 19 Flyby at 270 Million Kilometers

Space agencies coordinate multiwavelength observations, reiterating the visitor is a natural, nonthreatening comet.

SpaceX Sets Tuesday Vandenberg Launch to Add 27 Starlink V2 Mini Satellites

Webb Data Point to Thick Atmosphere on Ultra‑Hot Super‑Earth TOI‑561 b

Starlink Reports 200-Meter Near Miss With Newly Launched Chinese Satellite

Interstellar Comet 3I/ATLAS Nears Dec. 19 Flyby as Global Network Tracks Green Glow and Sunward Anti-Tail

Scientists Detect Granite Batholith Heating the Moon’s Compton–Belkovich Region

Record 7-Hour Gamma-Ray Burst From Dusty Galaxy Challenges Models

Stories older than 24h

Geminid Meteor Shower Peaks Overnight With Up to 120 Meteors per Hour

Geminids Peak Overnight Dec. 13–14 With Dark Skies Boosting Views

New X-Ray and Gemini Images Refine View of Interstellar Comet 3I/ATLAS Before Dec. 19 Earth Flyby

Parker Solar Probe Reveals CME Material Falling Back to the Sun as Craft Repeats Record-Close Pass

Webb Data Point to Thick Atmosphere on Ultra‑Hot Super‑Earth TOI‑561 b

Blue Origin Sets Dec. 18 New Shepard Flight Carrying First Wheelchair User to Edge of Space

Interstellar Comet 3I/ATLAS Nears Dec. 19 Flyby as New Data Point to Unusually Intense Activity

Closest Directly Imaged Planet Around Two Suns Confirmed on a 300-Year Orbit

Northern Lights Possible Across Northern U.S. This Weekend, With Best Odds Friday Night

Geminids Peak This Weekend Under Darker Skies, With Forecasts of 120–150 Meteors Per Hour

NASA Still Without Contact With MAVEN Mars Orbiter After Dec. 6 Blackout

Firefly to Fly Volta’s Laser Power Receiver on Blue Ghost Mission 2

Study Challenges 'Ice Giant' Label for Uranus and Neptune