I hope this hasn't been asked and answered already (a casual survey of the GD threads didn't show an obvious one).
Do the planets revolve around their stars from turn to turn? The screenshots suggest their position would matter - you could be really near an enemy planet or pretty far if you're talking about the outer planets of adjacent systems. Or does movement within a solar system still not use movement points? I really can't tell from the screenshots.
Also, what's this I hear about mine-able asteroids on the map? Sounds interesting, do we have any more details than those mentioned in the Gamespot article?
Xentax