Artificial Satellites: (topic last updated February 24, 2001)

Heavens-Above: Originally begun by the DLR German Space Operations Center (GSOC), the aim of Heavens-Above GmbH is to provide all the information necessary to observe satellites, the International Space Station, the Space Shuttle, and the dazzlingly bright flares from Iridium satellites. The site is still hosted by the GSOC. (http://www.heavens-above.com/)

Visual Satellite Observer's Home Page: This site provides an introduction to satellite observing, information on satellites to watch, and related news reports. It is produced by Jeff Hunt, Neil Clifford and Bart De Pontieu. (http://www.satobs.org/satintro.html)

NASA Realtime Orbital Data: This site provides shuttle landing ground tracks, sighting opportunities, orbital tracking, orbital elements, and weather forecasts for shuttle launches and landings. Some portions required Java. (http://spaceflight.nasa.gov/realdata/index.html)