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Asteroid Watch - Official Site
Two small recently discovered asteroids are safely passing by Earth within one lunar distance this week. Average distance between Earth and the moon is about 239,000 miles (385,000 kilometers). The Asteroid Watch Widget tracks asteroids and comets that will make relatively close approaches to Earth ...
Asteroid - Wikipedia
The first asteroid to be discovered, Ceres, was originally considered to be a new planet. This was followed by the discovery of other similar bodies, which, with the equipment of the time, appeared to be points of light, like stars, showing little or no planetary disc, though readily distinguishable from stars due to their apparent motions ...
Asteroid | Definition of Asteroid by Merriam-Webster
Define asteroid: any of the small rocky celestial bodies found especially between the orbits of Mars and Jupiter; starfish — asteroid in a sentence
Asteroid Fast Facts | NASA
This image, taken by NASA's Near Earth Asteroid Rendezvous mission in 2000, shows a close-up view of Eros, an asteroid with an orbit that takes it somewhat close to Earth.
Big asteroid flies by Earth closer than the moon ...
The roughly 100-foot-long space rock was about the same size of the meteorite that exploded over Chelyabinsk, Russia, in 2013.
Asteroid - definition of asteroid by The Free Dictionary
Define asteroid. asteroid synonyms, asteroid pronunciation, asteroid translation, English dictionary definition of asteroid. n. 1. Astronomy Any of numerous small solar system bodies that revolve around the sun, with orbits lying chiefly between Mars and Jupiter and characteristic...
Asteroid Bennu: Target of Sample Return Mission
Bennu is an asteroid that might collide with Earth someday, although the chances are slim. A NASA spacecraft is en route to rendezvous with the asteroid, collect and sample and bring it back to Earth.