At 15:09 ET today, NASA sent a signal to decommission the Galaxy Evolution Explorer (GALEX) after ten years of tireless work shooting the galaxy in lower Earth orbit. NASA says GALEX will float around for another 65 years before it re-enters the Earth's atmosphere and essentially self-destructs.
We only have five billion years left until the Milky Way galaxy crashes into Andromeda, our nearest neighbor. What will happen to us then? Because galactic collisions take place over millions or billions of years, the process isn't well understood.