SpaceRef - Astronomy - Asteroids And Comets

An Asteroid Family Gallery - This site at Washington State University contains images derived from models and maps made of asteroids using optical and radar imaging methods.

Asteroid Fact Sheet - The page at NASA GSFC's National Space Science Data Center (NSSDC) provides detailed information on the asteroids.

Asteroid Nomenclature at United States Geological Survey (USGS) - This page at the United States Geological Survey (USGS) is part of the Gazetteer of Planetary Nomenclature. It describes the formal names that have been bestowed on the surface features of asteroids.

Asteroid Radar Research - This site focuses on how radar is used to both detect, and analyze the shape and composition of asteroids as they pass by Earth. [NASA Jet Propulsion Laboratory]

Asteroids, The Nine Planets - This page provides an overview of asteroids - their formation, composition, distribution, and surface features.

Asteroids: Deadly Impact - This 1997 article at National Geographic Magazine discusses asteroids and the impact threat they pose to Earth.

Near-Earth asteroid 3753 Cruithne - Earth's curious companion - "The near-Earth asteroid 3753 Cruithne is now known to be a companion, and an unusual one, of the Earth. This asteroid shares the Earth's orbit, its motion "choreographed" in such a way as to remain stable and avoid colliding with our planet."

NSSDC Photo Gallery of Asteroids - This page contains a collection of images taken by spacecraft, the Hubble Space Telescope, and radar observations from Earth of asteroids Ida (and its moon Dactyl), Toutatis, Gaspra, and Vesta.

Selected Asteroids at United States Geological Survey (USGS) - This page contains descriptions of several asteroids which have been visited by space probes. Included are images of each along with some physical and orbital constants.

Sky & Telescope's Asteroids Page - This page features links to several articles on asteroids published in Sky & Telescope Magazine