Provides a general overview of comets, asteroids, and meteorites. Content includes ways to identify them in the night sky, as well as detailed information on each type of small body.

Amazing Science provides teachers with facts about comets that they can use as a reference or to stimulate class discussion. The science questions support the instructional activity's activities.

This video segment adapted from NASA uses animation to illustrate the properties of meteor showers and comets. Included is are visualizations of a comet's tail and of Earth passing through a debris stream left behind by meteoroids.

This site from the National Space Science Data Center provides information on the Giotto mission which was designed to study Comet P/Halley. The spacecraft encountered Halley on March 13, 1986 and approached to within 600 km. This page...

Learn more about the life of the scientist that proposed the theory of mass extinction of the dinosaurs due to an asteroid or comet in this article. Read all about the life and scientific discoveries of Luis Alvarez.

This article, reprinted from the fall 1979 LBL News Magazine, was written about Dr. Luis Alvarez and his part in the study of geological sediments and the great extinctions.

You can produce sky maps for any date and time, viewpoint or observing location. See your sky map, horizon view, or track an asteroid or comet on this highly interactive site.

This site from NASA has information on the Galileo space mission, which launched in October 1989. In spite of technical problems, Galileo transmitted enormous amounts of new data, especially about Jupiter and its satellites and rings,...