Despite Leena, Evil Artie, and everything else:
I got a good laugh out of the U.S.S. Eldridge reference.
I did too! I also noticed that the barometer froze time for *47* seconds!
As for the astrolabe, I really doubt anyone is going to try to use it again. But for argument's sake, would using it again really undo all the changes from the last time? Assuming it's someone other than Artie that uses it, couldn't they just go back a little bit, and not all the way back to when Artie used it? I guess I'm a little fuzzy on the way it works.