Introduces the bodies in space also known as planetoids, minor planets, or when they stray from their paths, meteoroids.

Describes how asteroids are formed and discusses the types of asteroids that are contained in the asteroid belt between the orbits of Mars and Jupiter, with details about some of the asteroid collisions from the past.

With an asteroid on a collision course with Earth, Doctor Toby Glyer and his partner William Connors must find a way to make contact with their wayward children -- the Briareus nanites -- and save the planet.

Presents information about asteroids and comets, including fast facts, history, and technology used to study them.

Text and illustrations explore the theory that the collision of an asteroid with the Earth ended the Cretaceous Period and caused the extinction of the dinosaurs.

"Icy, rocky, sometimes dusty, always mysterious--comets and asteroids are among the Solar System's very oldest inhabitants, formed within a swirling cloud of gas and dust in the area of space that eventually hosted the Sun and its planets. Locked within each of these extra-terrestrial objects is the 4.6-billion-year wisdom of Solar System events, and by studying them at close quarters using spacecraft we can coerce them into revealing their closely-guarded...