"Presents information about asteroids and comets, including fast facts, history, and technology used to study them"--Provided by publisher.

Provides an introduction to comets, covering where they come from, how they travel, their importance to astronomers, as well as their relationship to meteor showers.

Buster tries to convince Arthur, the Brain, and his other friends that he not only saw a UFO but also a comet heading for the earth.

"When dark comet UD3 was spotted near Jupiter's orbit, its existence was largely ignored. But to individuals who knew better -- scientists like Benjamin Schwartz, manager of NASA's Center for Near-Earth Object Studies -- the threat this eight-kilometer comet posed to the survival of the human race was unthinkable. The 150-million-year reign of the dinosaurs ended when an asteroid impact generated more than a billion times the energy of an atomic bomb....

"This book looks at comets, exploring what they are, where they come from, what people thought of them in the past, and how we study comets today. A fun activity is provided along with tips for spotting comets. Beautiful photographs and simple text help to engage readers and aid their understanding"--Provided by publisher.

An easy-to-read introduction to the origins, composition, and orbits of comets and what happens when comet debris falls to the Earth.

"There's a comet speeding in from the outer solar system, and it's about to slam into an asteroid. Who will be left standing after this interplanetary smackdown? The pockmarked asteroid, a veteran fighter who's already seen some action? Or the dazzling comet, with its incredible velocity and a tail that stretches millions of miles? Kicking off a dynamic series on cosmic collisions, Asteroid vs. Comet starts by comparing the two opponents, then offers...