Solar System: Asteroids, Comets and Meteors: Near Earth Objects

Virtual exhibition and online activities on the nature of NEOs and the hazard they pose, what efforts are being made to detect NEOs and avert collisions.

Short discussion of Yucatan and Tunguska impact events and current asteroid search programs.

NASA NEO Program Office at JPL. Overview, press releases, FAQ, 3D orbit viewer. Research information and statistics, including risk calculations for possible collisions with Earth.

Searchable database of near Earth asteroids, risk calculations for possible collisions with Earth, orbit calculation software.

Christian Science Monitor article examining asteroid collision science.

A search for NEO images in existing photographic plate archives. Archives used, procedures, personnel involved, sample images.

A project to search photographic plate archives for images of known NEOs. Procedures used, team members, images and measurements of successful precoveries.

Efforts on 1937 UB "Hermes", a long-lost Apollo asteroid, rediscovered in 2003, now numbered (69230) Hermes.

A public program offered by the University of Arizona's Spacewatch Project. Volunteers review images to help find NEOs that the computers miss.

Encyclopedia article covers collision danger, spacecraft access, efforts to catalog NEOs, classifications, impact hazard scales.

Offers essays by a university teacher on near Earth object with unusual orbits, such as 3753 Cruithne, 2002 AA29, hypothetical Earth trojans and quasi-satellites.