In October 2017, a fast moving object of extrasolar origin, named ‘Oumuamua, was discovered close to the Earth with a ground-based telescope in Hawai’i. Motivated by the hypothesis that ‘Oumuamua could conceivably be an interstellar probe, astronomers from the SETI Institute used the Allen Telescope Array (ATA) to search for radio transmissions that would indicate a non-natural origin for the object. This artist’s impression shows the first...
