Science ❯ Astronomy ❯ Astrophysics

Interstellar Objects

3I/ATLAS Comets 3I/Atlas Comet 3I/ATLAS A11pl3Z Comet 3I/Atlas Comet Characteristics Observation Techniques Characteristics of 3I/ATLAS Detection Methods Planet Formation A11pI3Z C/2025 N1 (3I/ATLAS) Comet 2I/Borisov Cometary Composition 31/ATLAS

14 ARTICLES

2w ago

Interstellar Visitor 3I/ATLAS Reappears in Earth’s Skies After Unusual Perihelion Surge

The key test now is whether the measured non‑gravitational acceleration is explained by heavy outgassing that would leave a vast coma detectable during the mid‑December Earth passage.

14 ARTICLES

2w ago

3I/ATLAS Brightens Unusually and Turns Blue Near the Sun as Data Indicate a Cosmic-Ray–Altered Crust

10 ARTICLES

4w ago

Water Detected From Interstellar Visitor 3I/ATLAS as Perihelion Nears