3I/ATLAS Is Not an Alien Spacecraft: SETI Observations Set Upper Limits on Technosignatures

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Sofia Sheikh and Valeria Garcia Lopez led a SETI study using the Allen Telescope Array to search for technosignatures from interstellar comet 3I/ATLAS, finding no alien signals and setting upper limits of about 10 to 110 watts, which supports that this object—and other interstellar visitors like 1I/’Oumuamua and 2I/Borisov—are likely natural rather than artificial.

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Interstellar comet 3I/ATLAS is not an alien spacecraft: SETI hunt for technosignatures comes up empty
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Interstellar comet 3I/ATLAS is not an alien spacecraft: SETI hunt for technosignatures comes up empty

Scientists failed to find radio signals emanating from the interstellar comet 3I/ATLAS, further bolstering its status as a natural object, not one made by aliens.