| About the Constellations | Legg Middle School Planetarium | |
| Amazing Space Online Activities | ||
| Analemma Society | Developing plans for an astronomical park at Great Falls | |
| Ask the Space Scientist | ||
| Astronomical Data (including sunrise and sunset times) | ||
| Astronomy Cafe | ||
| Astronomy Magazine | ||
| Mr. Eclipse | ||
| National Air and Space Museum | ||
| The (Nine) - 8 Planets | ||
| NOVAC - Northern Virginia Astronomy Club | ||
| The Planetary Society | ||
| SEDS - Students for the Exploration and Development of Space | ||
| SETI@Home | Join the search for extraterrestrial intelligence | |
| Sky and Telseope Magazine Online | Sky Publishing Home Page | |
| Sky Maps | ||
| Solar Terrestrial Dispatch | Reports on solar and auroral activity | |
| Space Day | Fun activities and lots of information for students and teachers | |
| Stars and Constellations | ||
| U.S. Naval Observatory Homepage | ||
 
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