How is the universe 156 billion light years across if it is only 13.7 billion years old?
posted by plexi on Mar 12, 2008 - 17 answers

Seeking recommendations for some great space exploration/simulation games. [more inside]
posted by Rhaomi on Dec 20, 2007 - 10 answers

AskMeFi Physics folk: How do astronomers account for the temporal distinctiveness of their galactic subjects in their calculations? I understand that observations of the red shift of quasars delinates a speed increase in the expansion of the universe - yet my brain explodes when I try to understand how the enormous expanse of time is factored into these models. [more inside]
posted by 0bvious on Apr 9, 2006 - 12 answers

Does space expanding require more nothingness inbetween? [more inside]
posted by leibniz on Mar 10, 2006 - 14 answers