http://www.sky-map.org./
LOTS of objects and hubble photos associated with various objects, but not all features are implemented yet..
BUT if you want a nice open source astronomy program try Stellarium, one of the most popular planetarium programs around. Nice and fast (OpenGL), cross-platform/GPL and multi-lingual too so lots of schools use it;
Telescope compatability (short list: new feature - mostly Celestron & Meade):
Very nice
LOTS of objects and hubble photos associated with various objects, but not all features are implemented yet..
BUT if you want a nice open source astronomy program try Stellarium, one of the most popular planetarium programs around. Nice and fast (OpenGL), cross-platform/GPL and multi-lingual too so lots of schools use it;
Telescope compatability (short list: new feature - mostly Celestron & Meade):
Very nice