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

In my view of the sky from Mobile, AL - looking southward - there is a star shimmering brightly in red, yellow and even green. What is it? [more inside]
posted on May 31, 2008 - 25 answers

Help me find a cool screen saver that won't infect my computer. [more inside]
posted on May 15, 2008 - 11 answers

What would be the effects on the earth if the moon exploded? [more inside]
posted on Aug 28, 2006 - 29 answers