California Institute of Technology
Caltech Astronomy: Light Pollution and the Palomar Observatory
Learn about light pollution, how it is created, and it's negative impact on astronomical observatories, in particular, the one on Palomar Mountain, California. From the Caltech astronomy department this is an informative look at the...
US Navy
United States Naval Observatory Homepage
United States Naval Observatory is a unique observatory run by the Navy. It does some of the grunt work of astronomy -- keeping accurate time, determining positions of stars (astrometry), etc. They are responsible for publishing the...