Eric Weissenstein's World of Astronomy
 | Satellite Predictions |
| STARCast: Daily observing conditions |
| Flinthill Amateur Astronomy |
| International Dark-Sky Association (IDA) |
| Astronomy section of The Hitchhiker's Guide to the Galaxy |
| NASA Astronomy Headlines Archive |
| National Radio Astronomy Observatory (NRAO) |
| The Planetary Society |
| Richmond Astronomical Society |
| Satellite Passes over North American Cities |
| Search for Extraterrestrial Intelligence at Home |
| SkyView: The Internet's Virtual Telescope |
| SkyWatch: Daily email on astronomical events. |
| Space News From CNN |
| StarDate Online |
| Students for the Exploration and Development of Space (SEDS) |
| USNO Astronomical Applications Department |
| Windows to the Universe |
| Society of Amateur Radio astronomers |
| Great-space-and-astronomy-lesson-plan-ideas |
