Idk why people are downvoting you. The moon has literally nothing we could use to create a self-sustaining colony. Idk if I necessarily agree with your timelines (the future is, um, a bit unpredictable...). But in any forseeable timeline, a moon base watching earth get hit by an asteroid would be watching their own death on slow motion, as everything they need to survive is on earth.

[–] SorteKanin@feddit.dk 3 points 1 week ago

But in any forseeable timeline

500 years was just a number I threw out there as "clearly beyond any forseeable time". It could be 200 years, 1000 years, maybe never. Point is just that it's completely wrong to think that we just need to land on the moon or on Mars and then we're an "interplanetary species" and if Earth goes, we have a backup plan.