Science, NASA, Physics, Astronomy
| Astronomy Magazine |
| College of Wooster - Seismic Station |
| Earth and Moon Viewer - Real-time |
| Earth View from Space - Real-time |
| NASA - Home Page |
| NASA - Hubble Space Telescope |
| NASA - Real-time Orbital Tracker (Shuttles) |
| PhysicsWorld - PhysicsWeb |
| Popular Science Magazine |
| Scientific American Magazine |
| Sky and Telescope Magazine |
| South Pole Home Page |
| Space.com |
| U.S. Geological Survey |
| U. S. Naval Observatory |
| USNO Master Clock (set your watch-exactly if you ignore Einstein's discovery that time is Personal)) |