This site describes soft gamma repeaters. The author, Robert C. Duncan of the University of Texas at Austin, explains how these strange, physically-extreme stars form, and why they emit steadily pulsating X-rays with...

The Abrams Planetarium, located at Michigan State University, has this homepage that describes various aspects of the outreach program created by the establishment. In addition, the page provides links to many other...

The Space Telescope Science Institute's Amazing Space site is the product of teachers teamed up with scientists, engineers and staff from the institute. This site has interactive lessons in astronomy and math designed...

This collection of teaching tools, authored by the Space Telescope Science Institute (U.S.) includes lithographs, fast facts, graphic organizers, question and answer sessions, and online explorations on an array of...

This site from Paper Plate Education provides an activity using only a globe and plastic cup to determine the position on the earth where the sun appears directly overhead. Plotting this point on several days throughout...