It is unclear whether a [3I/ATLAS] would transmit radio signals … such signals would take tens of thousands of years to cross ...
Harvard astrophysicist Avi Loeb is one of the biggest proponents of the theory that the comet was sent by an alien ...
Scientists used the world's largest single-dish radio telescope to scan comet 3I/ATLAS for signs of extraterrestrial life, but found no artificial radio emissions.