Lets say someone figures out how to construct a Light Speed propulsion system. Andromeda is our nearest galaxy. Even at light speed it will take a bit over 2.2 million years to reach it. That is one heck of a generational stsrship eh?
A Wormhole perhaps. But it would need to be a large wormhole.
With our technology it takes 6 months just to reach Mars so.🤷♀️