“That’s an important point: we’re looking for advanced civilisations transmitting their presence, rather than primitive life.”
However, despite the ‘encouraging’ conclusion about the likely existence of alien life, the study’s other result is the 17,000 light-year distance to such civilisations.
He said: “If the alien civilisations are evenly spread around the Milky Way, that would mean a single conversation exchange would take 34,000 years.
“And even in the weak scenario, they get 928 civilisations. But that’s still 3,000 light-years away.