SETI finds no evidence of alien tech on 3I/ATLAS interstellar comet
The SETI Institute conducted a radio scan of the interstellar comet 3I/ATLAS and found no evidence of alien technology or technosignatures, confirming its natural origin. Discovered in July 2025 by NASA’s ATLAS telescope, the comet—originating outside the solar system—was analyzed over seven hours, with researchers ruling out 200 potential signals as human interference.
The SETI Institute has concluded that the interstellar comet 3I/ATLAS, discovered in July 2025, shows no signs of extraterrestrial technology. Researchers scanned the comet for over seven hours, examining 74 million narrow-band radio signals and dismissing 200 potential signals as human interference or unrelated to the object. Discovered by NASA’s Asteroid Terrestrial-impact Last Alert System (ATLAS) in Chile, 3I/ATLAS was confirmed as the third known interstellar object after traveling at 137,000 mph. It originated from outside the solar system, likely ejected billions of years ago from the direction of the Milky Way’s central region near Sagittarius. Observations from the Hubble Space Telescope estimated its size between 1,400 feet and 3.5 miles, matching typical comet characteristics like an icy nucleus and a surrounding coma. Unlike solar system comets, 3I/ATLAS follows a hyperbolic orbit, proving its extrasolar origin. SETI’s findings reinforce earlier claims by NASA and other scientists that 3I/ATLAS is a natural comet, not an artificial probe. The analysis accounted for the comet’s movement and excluded human-made signals, leaving no detectable technosignatures.
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