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Observations

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.

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

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

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

Hubble and ESA’s Juice Capture Clearer Views of Interstellar Comet 3I/ATLAS Ahead of Dec. 19 Flyby

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

Hubble and ESA’s JUICE Return New Views of Interstellar Comet 3I/ATLAS Ahead of Dec. 19 Earth Pass

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

Cryovolcanic Jets Reported on Interstellar Comet 3I/ATLAS Ahead of Dec. 19 Earth Approach

UN and IAWN Launch Two-Month 3I/ATLAS Tracking Exercise as Agencies Reaffirm No Threat

3I/ATLAS Nears Dec. 19 Earth Flyby as NASA Affirms It Is a Natural Interstellar Comet

Interstellar Comet 3I/ATLAS Nears Dec. 19 Earth Flyby as Study Flags Strong Jupiter Perturbation

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

NASA Unveils Closest Images of Interstellar Comet 3I/ATLAS After Multi‑Mission Campaign

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

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

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

NASA Set to Release HiRISE Images of Interstellar 3I/ATLAS as ESA Refines Its Track

3I/ATLAS Unveils Rapidly Growing Tail in New Observations

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