A Near Earth asteroid (or N.E.A.) is an asteroid with an orbit around the Sun that brings it near that of Earth. These asteroids risk impacting the Earth's surface, though a large asteroid has not hit since the 1908 Tunguska event.
A Near Earth asteroid (or N.E.A.) is an asteroid with an orbit around the Sun that brings it near that of Earth. These asteroids risk impacting the Earth's surface, though a large asteroid has not hit since the 1908 Tunguska event.