Earth is doomed, and there’s nothing we can do about it. The Andromeda galaxy is about to smash into the Milky Way. (It’s currently heading towards us at 250,000 mph, and that speed will increase as it gets closer.) Earth will be torn from its galactic orbit and flung elsewhere. Fortunately this will happen in about 4 billion years, so I for one will be quite happy to see it in person.
Thanks to Josh for this link.