Asteroid and Comet Impact Hazards - includes NEO hazards introduction and FAQ, and resources; provided by the NASA Ames Research Center.
2002 Meteor Shower Calendar - quarterly breakdown of meteor showers, with coordinates, viewing tips, and more. From the International Meteor Organization.
NASA's Near-Earth Object Program - information about near-earth object studies, including asteroid orbits, images, updates, potentially hazardous asteroids (PHA), and more.
International Meteor Organization (IMO) - information about meteor observing techniques, analyses and recent results from world-wide data, a list of meteor showers, glossary, meteor-related projects, addresses, and more.