this post was submitted on 05 Feb 2026
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[–] AA5B@lemmy.world 2 points 7 hours ago* (last edited 7 hours ago)

I can picture the possibility of a probe visiting our nearest neighbors

But there are so many problems with a generation ship going that far, and no, none of the fun sci fi ways of travel are possible.

Bringing this back to reality, I can definitely see exploring more of the solar system and I can see making use of resources on hand for bulk consumables like fuel, oxygen, water, housing (we’ll have to to make it work). But consider how many things it would take to actually be independent of earth and how large the colony needs to be. Remote bases in our inner solar system can get away with that, but you can’t leave the solar system and expect to rely on any resupplies from earth.

Even if you could achieve the travel time to visit another star system and build a generation ship with enough supplies of everything and that could function that long, how would you survive without a preexisting functional colony of millions of people? Just start with the thousands of types of plastics we use every day and imagine trying to support that for a few people, without oil to drill or other organic chemicals to mine, and without a full scale chemical industry