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 Two Micron All Sky Survey at IPAC website provides an image gallery of the solar system's objects, Jupiter's moons, H II regions, star formation regions, and reflection nebulae, open star clusters, globular star...

This website, authored by Douglas Haig of the University College-London, contains information for students unfamiliar with the cosmic microwave background. It first discusses the Big Bang, then it explains inflation,...

The purpose of this website is to make a collection of web acessable original documents, reviews, and online links to articles on topics including cosmology, particle physicis, and extragalactic astronomy. This website...

This NASA Image of the Day is the first image of the Earth and moon in a single photograph. The image was captured 7.25 million miles from Earth by Voyager 1 in 1977. More information about the photograph and a link...

Created by Paul Falstad, this page compares the distance/magnitude/size of various objects or constants. This includes physical dimensions such as the diameter of particles, atoms and biological cells, the height of Mt....

This website, created by Lindsay Marie Bartolone at Princeton University, gives astronomy teachers labs and activities for their students that meet the requirements of the Core Curriculum Content Standards of the State...

This web page, authored and curated by David P. Stern, provides a non-mathematical introduction to modern magnetometers that depend on the saturation of magnetic materials. Applications include the observation the very...

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...

Academic Earth provides videos of lectures by top scholars in "Subjects" that range from Astronomy to Entrepreneurship to Religion, from "Universities" as celebrated as MIT, Berkeley, Harvard, and Stanford. Visitors...