Near-Earth asteroid

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Near-Earth asteroids (NEAs) are asteroids whose orbits are close to Earth's orbit. Sometimes one crashes into earth. We try to find out if any are going to hit Earth using Asteroid impact prediction. Two near-Earth asteroids have been visited by spacecraft: 433 Eros, by NASA's Near Earth Asteroid Rendezvous probe and 25143 Itokawa, by the JAXA Hayabusa mission.

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