Wondering what that point of light you see speeding across the night sky is? It's probably a satellite, and you can find out what satellite it is from the GSOC Satellite Prediction service. This Web site provides predictions of observable satellites, from mighty Mir to many smaller, dimmer, satellites, for any location on the planet. The site has also added predictions for "Iridium flares", the sudden, very bright flashes cased by reflections off Iridium satellites. This site is a great place to go if you're at all curious to find out what satellites you can see in the night sky.

http://www.gsoc.dlr.de/satvis

The Lunar Prospector spacecraft was launched last week to perform a comprehensive scientific survey of the lunar surface. The official Web site for the mission has detailed information about the spacecraft and its mission, as well as information about the history of the Moon itself. A great place to get ready for the mission!

http://lunar.arc.nasa.gov/

While the title might suggest something of interest just to people in this Illinois city, the Web site of the Peoria Astronomical Society has something to offer to Web surfers worldwide. An astronomical handbook teaches visitors about various concepts in astronomy with notes and interactive presentations. Another section has a comprehensive directory of astronomy links. The entire site features exquisite graphics and design. An excellent online astronomy resource!

http://bradley.bradley.edu/~dware/

The Equator-S satellite is a German mission to study the equatorial magnetosphere of the Earth. Originally conceived as a NASA mission back in 1980(!), the mission has died and been reborn several times before its successful launch in December. This Web site provides a detailed look at the mission, including its scientific objectives, instruments, personnel, and latest news about the mission. This site shows an excellent way of communicating the purpose of a mission simply and effectively.

http://www.mpe-garching.mpg.de/www_plas/EQS/eq-s-home.html