If we're around long enough, and the sun lasts long enough, eventually Earth will be locked to a moon that's moved further away. Then you might have to travel just to see the moon ;)
won't we see it on the Mars commute?
in fact that's where i'm intending to pull over and pee
(not b/c i need to b/c of the waste recycling suit, just so i can see how far i can pee in 1/6th gravity)