How long would it take for an alien civilization to populate an entire galaxy?

Re:How long would it take for an alien civilization to popul... by unmdplyr on Friday June 18, 2021 @01:03AM (#27547522)

> Mind you, this simulation is conservative. It assumes that the ships have a range limited to 10 light years — about a dozen stars are within this distance of Earth — and travel at 1% the speed of light.

For comparison the fastest we have done is 200 km/sec and that's doing various gravity gymnastics by Parker Solar probe. 1% speed of light is about 3,000 km/sec.

[ Parent | on HN ]

Re:How long would it take for an alien civilization to popul... by raxxorrax on Friday June 18, 2021 @02:33AM (#27547904)

> 200 km/sec

That also came with a lot of gravitational debt very close to the sun. So it is even worse than it sounds.

There was also another thread here: https://news.ycombinator.com/item?id=27526803

This article says the universe is very old, I think this probably is also "bad astronomy".

[ Parent | on HN ]