Researchers pointed the Allen Telescope Array at interstellar visitor 3I/ATLAS and searched for narrowband radio transmissions that might indicate technology. They found nearly 74 million candidate signals, which sounds like the aliens finally discovered robocalling until the team traced the noise back to human interference.
3I/ATLAS formed around another star and is only the third confirmed interstellar object observed passing through our solar system. That makes it scientifically valuable even when it behaves exactly like a natural object—which the evidence says it does.
The search was designed to fail carefully
The telescope observed for more than seven hours across frequencies from 1 to 9 gigahertz. Narrowband signals are useful SETI targets because nature rarely concentrates radio energy into such extremely tight frequency ranges.
Filtering removed transmissions associated with satellites, aircraft, electronics and terrestrial radio sources. No candidate survived as a credible technosignature from 3I/ATLAS.
No signal is still a result
The observations place limits on the strength of any transmitter that could have gone undetected and demonstrate how rapidly SETI instruments can respond to newly discovered interstellar visitors. The object also offers a rare sample of material from another planetary system.
The research summary describes the observing campaign, frequency range and signal filtering.
No alien craft or communication was detected. Scientists listened anyway, because that is how evidence works: point the instrument, publish the method and do not declare first contact because your neighbor's router cleared its throat.
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Wade Crowley
Strange News & Small-Town WeirdWade collects stories that begin with “You are not going to believe what happened at the Walmart.” He covers odd crime, local legends, UFOs, and reality losing the plot.
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