Asteroid/Comet Connection: A digest of news related to asteroids, comets, and meteors. Monitors changes in impact risk calculations. Includes links to original sources of information

Comet Shoemaker-Levy Collision with Jupiter: Extensive coverage of the event July 1994. Includes observations, reports, 1444 images, news releases and links

Complete Sun and Moon Data for One Day: Calculates the times of sunrise, sunset, moonrise, moonset, transits, and the beginning and end of civil twilight, along with information on the Moon's phase by specifying the date and location

Mission to Geospace: Educational site with links, articles, pictures, and movies