Q&A: General Astronomy and Space Science

Q:
Where do Giant Molecular Clouds come from?

A:
Giant molecular clouds are the gas and dust that are left over after the formation of a galaxy. Here are a few web locations where you can read more about them:
http://hubblesite.org/newscenter/newsdesk/archive/releases/1997/34/
http://archive.ncsa.uiuc.edu/Cyberia/Bima/GMC.html
And, some Chandra X-ray Observatory images that might be of interest to you are here:
http://chandra.harvard.edu/press/00_releases/press_110800.html
http://chandra.harvard.edu/photo/2001/2237/index.html
http://chandra.harvard.edu/photo/2000/0054/index.html