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...
NASA
Nasa: Astronomy Picture of the Day: Hypatia
Learn more about Hypatia when you check out this resource. This site features a picture and a brief synopsis of this famous scientist.
Concord Consortium
Concord Consortium: Stella
Students act as astronomers, studying stars in a patch of sky in our own galaxy. Using simulated data from spectroscopy and other real-world instrumentation, students learn to determine star positions, radial velocity, proper motion, and...