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Interstellar Objects

3I/ATLAS Comets 3I/Atlas Comet Characteristics A11pl3Z Comet 3I/ATLAS 31/ATLAS Comet 3I/Atlas 3I/ATLAS Characteristics Cometary Composition 3I Atlas Comet Behavior 3i/Atlas Formation of Solar Systems Research Implications Formation and Evolution 3l/ATLAS Comet Studies Comet Composition Planet Formation A11pI3Z C/2025 N1 (3I/ATLAS) Comet 2I/Borisov Detection Methods Alien Technology Observation Techniques Characteristics of 3I/ATLAS Non-gravitational Acceleration Behavior of 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

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

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

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

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

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

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

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

Interstellar Comet 3I/ATLAS Makes Closest Pass to Mars as Spacecraft Observe

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

Interstellar Comet 3I/ATLAS Tied to New Planet 'Seeding' Hypothesis

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

New Images Show Interstellar Visitor 3I/ATLAS Growing a Tail as NASA Dismisses Alien-Craft Claims

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

New Spectra Show 3I/ATLAS Is a Carbon‑Chain–Depleted Interstellar Comet With Weak CN Emission