[Brinty]

If you would like a scientist to answer any questions you have about anything to do with outer space, try this site - just don't expect a satisfactory answer. As with most scientists, this fellow is wearing the standard "skepitcals." To give him his due, he answers reasonably fairly - except for anything to do with 2012, Nibiru, passing through the plane of the galaxy, or anything relating to "the end of the world."

http://astrobiology.nasa.gov/ask-an-...gist/answered/