AMSAT-NA, Radio Amateur Satellite

Countdown to Launch

Keplerian Elements - Satellite Tracking Information

Keplerian elements, Shuttle, Mir, OSCAR

Marshall Space Flight Center

Mir Space Station

http://www.nasa.gov/

NASA Kennedy Space Center

NASA Shuttle Web Page

NASA's Shuttle/Mir Home Page

National Astonomy and Ionosphere Center (Arecibo Observatory)

Office of Space Communications

SETI Institute Home Page

SETI League - Search for ExtraTerrestrial Intelligence.

SPUTNIK 40 years

Space Shuttle Orbital State Vectors