MadSci Network: Astronomy |
Someone asked me this question on the Mad Scientist's Network two years ago: you should read their question and my response to it.
I also answered a similar question asked by a more advanced student last year; Here's my response.
The quick answer is that Europa has no atmosphere worth mentioning, but it might have liquid water beneath its icy surface which could make life possible.
Try the links in the MadSci Library for more information on Astronomy.