Provided by the US Geological Survey Astrology Research Program, the Gazetteer of Planetary Nomenclature Web site contains nearly everything you ever wanted to know about naming the physical features of planets. The site provides a history of the activity, details how names are approved, and of course contains an exhaustive list. For example, did you know that an Apollo 16 astronaut named a...

The National Space Science Data Center (NSSDC) archives and distributes spacecraft missions' planetary and lunar data and images. Users can find fact sheets, images, press releases, and other resources for the nine planets in the solar system as well as for asteroids and comets. The Catalog of Spaceborne Imaging offers over 500 images. The Discovery Program link describes the two new missions,...

The Henrietta Leavitt Flat Screen Space Theater is named for an American astronomer working at the Harvard Observatory in the beginning of this century. The site is authored by Carolyn Collins Petersen, an accomplished astronomy writer and part-time Hubble researcher. Carolyn takes viewers to "The Planetarium Show That Never Ends," where various heavenly bodies are displayed and described in...

Solvarviews.com is a private Web site maintained by scientist Calvin J. Hamilton, whose goal is to make high quality photographs of the planets and satellites available to the public on the Web. The Lesson Plans and Activities page of the site provides more than a dozen classroom activities with titles such as Comets, Convection, Impact Craters, Meteoroids and Space Debris, Eclipses, Life in the...