General Astronomy Links
NASA - http://www.nasa.gov
Astronomy Links - http://www.astronomylinks.com
Cincinnati Observatory - http://cincinnatiobservatory.org/ - The oldest observatory in the US featuring a 12-inch Clark refractor and a 16-inch Merz und Mahler refractor. The observatory was founded in 1843 - a great piece of astronomy history to visit.
If you have any links to add to this list please e-mail firstname.lastname@example.org and I will include them as soon as possible