Roanoke Valley
Astronomical
Society
The American Association of Amateur Astronomers
Eric Weissenstein's World of Astronomy
STARCast: Daily observing conditions
International Dark-Sky Association (IDA)
Astronomy section of The Hitchhiker's Guide to the Galaxy
NASA Astronomy Headlines Archive
National Radio Astronomy Observatory (NRAO)
Charlottesville Astronomical Society
Search for Extraterrestrial Intelligence at Home
SkyView: The Internet's Virtual Telescope
SkyWatch: Daily email on astronomical events.
Students for the Exploration and Development of Space (SEDS)
USNO Astronomical Applications Department
Society of Amateur Radio astronomers
Great-space-and-astronomy-lesson-plan-ideas
Southern Maryland Astronomical Society
Northern Virginia Astronomy Club