this post was submitted on 13 Aug 2023
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This assumes that faster than light travel is possible. Without it humans will not be escaping the sun.
What about those generational ships with closed ecosystems where people live and inbreed for hundreds of years until they reach another system?
The problem isn't travel time, it's speed. Space itself is continuing to expand, at a faster and faster rate. It's expanding so fast that we'll actually never reach far out with conventional means. We'd just endlessly drift through the darkness because we wouldn't be able to go fast enough to reach anything. A generation ship would simply not be able to get anywhere, ever.
I mean, maybe we can make it into another very close system, but what are the chances that there's anything even close to being habitable?
On a local level the expansion of space cannot overcome gravitational attraction to a certain scale, roughly around the size of our local galaxy cluster. We'll always be able to reach anything in our local galaxy cluster without FTL travel.