This page discusses the rubble pile model of asteroids. In it the author maintains that this model provides a better match to observational constraints and new results from numerical impact simulations than other...

This interactive multimedia feature introduces students to asteroids. Topics include what they are, where they occur, and the probability that a large asteroid might strike the Earth. There is a discussion of Near-Earth...

This radio broadcast discusses the renewed interest among space scientists in studying asteroids. Once disdained as uninteresting, asteriods are now considered to represent pristine material, essentially unchanged since...

This press report from the University of Chicago provides information about research on the Chicxulub asteroid. Scientists present new results about the formation of spherules at the Cretaceous-Paleogene boundary in...

This website from NASA is a photo gallery that contains images of planets, nebulae, galaxies, globular clusters, stars, compact objects, and spacecraft.