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3I/ATLAS 3I/Atlas Interstellar Comets Interstellar Objects Orbital Mechanics Comet Characteristics Cometary Nuclei Comet C/1861 (Thatcher) Comet 41P 3I/ATLAS Nucleus

ALMA Reveals 3I/ATLAS Is Exceptionally Methanol‑Rich, Indicating a Heterogeneous Interstellar Comet

Extreme methanol-to-HCN ratios point to formation conditions unlike those of most Solar System comets.

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

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

MeerKAT Technosignature Search Finds No Signals From Interstellar Comet 3I/ATLAS

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

Winter Solstice Arrives at 4:03 p.m. in Italy, Marking the Northern Hemisphere’s Shortest Day

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

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

UN Network Launches Global Campaign to Track Interstellar Comet 3I/ATLAS Before Dec. 19 Flyby

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

MeerKAT Registers First Radio Signature From Interstellar Visitor 3I/ATLAS

New Images Show Interstellar Comet 3I/ATLAS Glowing Green With an Elusive Tail After Sun Swing

Perihelion Data Show Non-Gravitational Push on 3I/ATLAS, Prompting New Scrutiny

NASA Reaffirms 3I/ATLAS Is a Natural Interstellar Comet

ESA Redirects JUICE and Mars Orbiters to Track Interstellar Comet 3I/ATLAS as Tail Brightens

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

Spacecraft Observations Sought as Loeb Raises Nuclear-Powered Theory for Interstellar Object 3I/ATLAS

Hubble Captures Sharpest View of Interstellar Visitor 3I/ATLAS, Strengthening Comet Case

Mission Studies Spotlight Juno Flyby of Interstellar Comet 3I/ATLAS

Researchers Estimate 3I/ATLAS Interstellar Comet Is Over Seven Billion Years Old