The first of 6 linked web pages, authored and curated by David P. Stern, on how the inner radiation belt was discovered in 1958 by Van Allen, on the type of instrument used (Geiger counter), on the belt's explanation...

This website, by California Institute of Technology astronomer Mike Brown, describes dwarf planets and the issues in their classification. A diagram show the "new" solar system, including the approximately 50 dwarf...

This web page, authored and curated by David Stern, provides information on disturbances in the earth's magnetosphere. Topics covered include magnetic storms, magnetic substorms, electric currents in space, dynamos, and...

This website, by Caltech astronomer Mike Brown, is an article that recounts the reclassification of Pluto as a dwarf planet. The article explains the issues, tells how they were resolved, and answers related questions....

Created by Mark Fisher of Glyph Web, this website is a reference guide to a wide range of astronomical objects. The site includes articles and images covering a wide range of cosmic phenomena. Some topics include:...