Let's say you were an astrophysicist who saw a wormhole open up in the sky above you, and you had video of it, magnetometer readings, whatever else you'd need to record it. What kind of recorded "proof" might be used to identify it as a wormhole-- after the fact? [more inside]
posted by MattS on Nov 16, 2009 - 11 answers

Help me brainstorm clever astrophysics bumper stickers! [more inside]
posted by np312 on Nov 15, 2009 - 15 answers

Does expansion of the universe decelerate orbits of planets and/or rotation of galaxies? [more inside]
posted by knave on Jun 16, 2009 - 11 answers

Why is the Big Bang possible? [more inside]
posted by Bonzai on Feb 20, 2008 - 24 answers

Would an expanding Sun really swallow the inner planets? [more inside]
posted by Burhanistan on Feb 5, 2008 - 17 answers

AstroPhysics: Why doesn't the moon move towards the earth, and other satellite related questions. [more inside]
posted by dpx.mfx on Aug 21, 2006 - 22 answers

I would like help understanding the CHANDRA xray satellite mission. [more inside]
posted by reflecked on May 4, 2006 - 7 answers

If there's anyone here who groks physics and math and astronomy and astrophysics here's a great big what-if for you. [more inside]
posted by Grod on Jan 25, 2006 - 14 answers