The large fireball observed on the morning of Feb. 15, 2013, in the skies near Chelyabinsk, Russia, was caused by a relatively small asteroid that entered Earth's atmosphere at high speed and at a shallow angle. Preliminary information...

This site explores the smaller bodies in the solar system, namely the various asteroids and comets. Links are also provided for additional information on related subjects.

Enter our solar system to interact with the planets, moons, asteroids, meteors, and more. Investigate with NASA scientists and explore missions related to space exploration. Read facts, compare statistics, look through resources, and...

A collection of video lectures from several guest speakers about issues of astrobiology and space exploration at Stanford University. The lectures cover topics like Martian meteorites, planetary system, life in space, and satellites....

This article, reprinted from the fall 1979 LBL News Magazine, was written about Dr. Luis Alvarez and his part in the study of geological sediments and the great extinctions.

Amazing Science provides teachers with facts about comets that they can use as a reference or to stimulate class discussion. The science questions support the lesson's activities.

A detailed overview of the history, mythology, and current scientific knowledge of each of the planets and moons in the solar system.