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.
http://www.astro.queensu.ca/~wiegert/3753/3753.html
Postado por caio em setembro 11, 2002 12:09 PM