MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Near-Earth asteroid, artwork. Near-Earth asteroids are asteroids whose orbits bring them in close proximity with the Earth. If an asteroid's orbit intersects with that of the Earth it is a collision risk. Any asteroid over 1 kilometre in diameter that impacted the Earth would cause catastrophic effects.
Model release not required. Property release not required.