Science ❯ Astronomy ❯ Comets ❯ Interstellar Comets

3I/ATLAS

No Alien Signals Detected From Interstellar Visitor 3I/ATLAS in Green Bank Scan

Researchers say the object's behavior matches known comet physics.

Radio Search Finds No Signal From Interstellar Comet 3I/ATLAS as Hubble Images Twin Jets

Sun-Facing Tail in Interstellar Comet 3I/ATLAS Reveals Wobbling Jets, Suggesting 15.5-Hour Rotation

EarthSky Names 2025’s Top Stories, Led by Interstellar Comet 3I/ATLAS

Interstellar Comet 3I/ATLAS Clears Earth as Spacecraft Capture Rare Sun‑Side Views

Interstellar Comet 3I/ATLAS Makes Closest Pass to Earth at About 168 Million Miles

Interstellar Comet 3I/ATLAS to Make Safe Closest Approach Friday at 167 Million Miles

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

Interstellar Comet 3I/ATLAS Shows Faint X-Ray Halo as Safe Dec. 19 Flyby Nears

Hubble and Juice Capture New Views of Interstellar Comet 3I/ATLAS Ahead of Dec. 19 Flyby

Hubble and ESA’s Juice Capture 3I/ATLAS With Active Coma and Twin Tails

Interstellar Comet 3I/ATLAS Shows Signs of Global Ice Volcanoes, Study Finds

NASA Publishes Mars-Captured Views of Interstellar 3I/ATLAS as Minority Raises ‘Anomalies’

NASA Unveils Multi‑Mission Views of Interstellar Comet 3I/ATLAS

NASA to Unveil New 3I/ATLAS Images Today at 3 p.m. EST

Radio Detection From 3I/ATLAS Bolsters Natural-Comet Explanation

Radio Detection From 3I/ATLAS Points to Comet Activity as New Images Show Sprawling Jets

China’s Tianwen-1 Releases Close Images of Interstellar Comet 3I/ATLAS as JPL Flags Non‑Gravitational Acceleration

Interstellar Comet 3I/ATLAS Reappears to Earth View as Anomalies Drive Push for Faster Data Releases

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