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Interstellar Comets

3I/ATLAS 3I/Atlas 2I/Borisov 3I/ATLAS Characteristics Borisov 3I/2025 N1 (ATLAS) 3I/ATLAS Properties C/2025 N1 (ATLAS) Comet 3I/ATLAS Chemical Composition 1I/Oumuamua 3I/ATLAS Observations Characteristics of 3I/ATLAS Comet Borisov 'Oumuamua

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

Fresh multi-band measurements indicate volatile-driven activity consistent with a natural comet.

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

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

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 Multi‑Mission Views of Interstellar Comet 3I/ATLAS

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

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

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

Europa Clipper May Skim 3I/ATLAS’s Ion Tail as Interstellar Comet Nears Perihelion

Keck Confirms Anti-Solar Tail and Nickel-Rich Emissions From Interstellar Comet 3I/ATLAS

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

Mars Orbiters Capture Closest Views of Interstellar 3I/ATLAS as UV Data Reveal Intense Water Outgassing

ESA Mars Orbiter Captures Closest View of Interstellar Comet 3I/ATLAS

Interstellar Comet 3I/ATLAS Slips Behind the Sun as New Study Finds Unusual Polarization

New Analysis Says Interstellar Comet 3I/ATLAS Is Far Larger Than First Estimated

3I/ATLAS Shows Growing Tail and Rapid Brightening as Evidence Favors a Natural Comet

SwRI Says Interstellar Comet Flybys Are Achievable as 3I/ATLAS Defies Expectations

Gemini Images Show 3I/ATLAS Growing a Tail, Underscoring Natural Comet Status