What are some topics in astronomy or cosmology that you find fascinating and mind blowing? [more inside]
posted on Jul 3, 2008 - 17 answers

Are there any great lecturers/public speakers in the realms of cosmology, astronomy and physics? [more inside]
posted on Jun 4, 2007 - 21 answers

"A human is halfway in size between an atom and the known universe"... This is a paraphrased quote I have come across several times. I like it. Who said it first? How true is it in the most literal sense? And, finally, what errors arrive in postulating a universe, or an atom, which can be measured AT ALL from our singular, relativistic, perspective? [more inside]
posted on Feb 18, 2007 - 14 answers

Can you help a reasonably smart layperson (who is not very good at math) understand how the word "information" is used in physics? [more inside]
posted on Feb 15, 2007 - 35 answers

Can anyone recommend any good recent articles or papers on whether the universe is infinite or finite? I've heard that scientists suspect that the universe is flat, which lends credence to the infinite-universe hypothesis. I've decided I don't know enough about this. Nothing too technical, please, though I'd prefer something more complex than an article from a newspaper science section.
posted on Jan 12, 2005 - 20 answers