Near-Earth asteroid
Near-Earth asteroids (NEAs) are asteroids whose orbits are close to Earth's orbit. A few tens of thousands have been found. 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.
Near-Earth Asteroid Media
Potentially Hazardous Asteroids 2013
1910 drawing of the path of Halley's Comet
The near-Earth asteroid 433 Eros as seen by the probe NEAR Shoemaker
Seven hours after discovery, 2023 CX1 burns up as a meteor over northern France
Asteroid 4179 Toutatis, a potentially hazardous object that passed within 4 lunar distances in September 2004 and currently has a minimum possible distance of 2.5 lunar distances
The Torino scale. The scale in metres is the approximate diameter of an asteroid with a typical collision velocity
Radar image of asteroid 290751950 DA
Asteroids discovered in the first three years of the Near-Earth Object WISE program, starting in December 2013, with green dots showing NEAs 
Cumulative discoveries of near-Earth asteroids (NEAs) over time
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