An interactive tool allowing users to "bombard" any planet in the solar system. Users set the diameter, velocity, and composition of the meteorite or colliding object. The program calculates crater depth and energy released upon collision.

A set of annotated links to web sites on meteor showers, meteorites, asteroids, comets, and related NASA image sets. Also features a podcast on Cosmic Debris by a noted SETI scientist.

A link to the full collection of K-12 educational resources developed by NASA's Astromaterials Research Office. Topics include meteors, exploration of the moon, astrobiology (the search for life outside Earth),and planetary science.