OT: Gravity, Dark Energy, Universal expansion

[dogscoff]

I think I may have heard this "gravity goes from pulling to pushing at extreme ranges" theory before, but I don't know if it was disproved or is still around or what. A bit of googlage may find someone who has done some work on it.

Mudshark said:
I have heard a theory that the moon stabilizes Earth, and it is slowly,flowing away.

Actually, the moon is falling, very very gradually. Every orbit it gets a tiny bit closer to Earth. Eventually, it will drop out of the sky and crash into us.

Of course, that's a long long way in the future. In fact, I think the sun will move into the next phase of its life by then, expanding to scorch and swallow up the inner planets (including us) so you've got a good few billion years to worry about it yet...