Let's say you're thrust headlong into a dogfight engagement in space. Era and galaxy of your choosing. What would the real-world physics look like? [more inside]
posted on Nov 2, 2006 - 58 answers

Would a bag collapse if I sucked the air out of it in outer space? [more inside]
posted on Sep 8, 2006 - 32 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 on Apr 9, 2006 - 12 answers

I've been somewhat obsessed with faster-than-light travel lately. Are there any scientists seriously studying thing such as the Alcubierre drive or other plausible, albeit exotic, ways to get from point a to point b without taking a million years? Is this something that just lacks the funding for any respected physicists to get involved? Surely there must be a department within NASA working on something a little more fun than sending a chemical rocket to a close planet. [more inside]
posted on Aug 26, 2005 - 17 answers

What would happen if someone were to build a tunnel or tube into space? (Description inside...)
posted on Jan 20, 2005 - 11 answers