That's 28 years on-ship time, but about 2.5 million years for an external observ...

FreeFull on June 21, 2020 | parent | context | favorite | on: Odds of communicating with 36 other possible intel...

That's 28 years on-ship time, but about 2.5 million years for an external observer in Andromeda or the Milky Way. If you want to make a return journey, then 5 million years would have passed on Earth by the time you get back.