> Except we can defend the earth from an asteroid for probably five orders of magnitude less money than establishing a self-sustaining colony somewhere else.
If we find out about it decades or centuries out. If it's a year out when we spot it, there's very little we can do with current technology to head it off (asteroid disaster movie plots notwithstanding).
> And if self sustaining is all you need, setting up a self-sustaining colony a mile underground is also five or six orders of magnitude cheaper.
It's also much more accessible by desperate refugees trying to get in as the planetary disaster approaches.
If we find out about it decades or centuries out. If it's a year out when we spot it, there's very little we can do with current technology to head it off (asteroid disaster movie plots notwithstanding).
> And if self sustaining is all you need, setting up a self-sustaining colony a mile underground is also five or six orders of magnitude cheaper.
It's also much more accessible by desperate refugees trying to get in as the planetary disaster approaches.