Breakthrough Listen Searches Interstellar Comet 3I/ATLAS for Alien Signals

Breakthrough Listen recently conducted a search for technosignatures from interstellar object 3I/ATLAS during its closest approach to Earth on December 19, 2025. Using the Green Bank Telescope, no credible signs of artificial radio signals were detected, confirming its natural cometary behavior. This marks the third interstellar object observed traversing our solar system.

• Breakthrough Listen searched 3I/ATLAS for technosignatures.
• Interstellar comet 3I/ATLAS made closest Earth approach on December 19, 2025.
• No credible alien radio signals were detected during observations.
• 3I/ATLAS is the third confirmed interstellar object observed.
• Observations were conducted with the Green Bank Telescope.
• It behaves as a natural cometary object, posing no threat.

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