The Asteroid Threat Watch Site. Near Earth Objects

Astroid watch:
Near earth objects are comets, asteroids, meteoroids that have been brought close to earth because of their orbit. Due to their close proximity to earth there is always a danger that there may be a collision between these objects and earth. Near earth objects have also been called NEOs for short. However, while there is a danger of a collision, NEOs are very important to scientists. Their close proximity to earth allows them to be easily accessible to spacecraft and therefore they can be studied, which can give us some very important or useful information.

For more information: http://www.asteroidwatch.com/