Is there a distance at which a satellite will orbit a body indefinitely? Is this distance a universal constant? [more inside]
posted by doublehappy on Oct 16, 2009 - 28 answers

Would orbiting solar power farms be remotely practical? [more inside]
posted by greytape on Apr 16, 2009 - 10 answers

I vaguely recall seeing some kind of online/download that tracked in near realtime all of the satellites orbiting earth, allowing the user to pan around. Am I insane, or does that exist?
posted by sharksandwich on Aug 3, 2008 - 7 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

Hypothetical from Moon-orbit to Earth-orbit question. I already know about free return trajectories, but what if something went wrong and your ship (currently orbiting the moon) didn't leave lunar orbit at the point it was supposed to? What might happen? [more inside]
posted by np312 on Aug 17, 2006 - 8 answers

What is the origin of the phrase, "(something) should be nuked from orbit," or "nuke it from orbit?" [more inside]
posted by mikeh on Jul 23, 2006 - 24 answers