Near-earth objects
Many hundreds of potentially hazardous asteroids larger than 140 metres across have orbits that occasionally bring them closer to Earth than 7.5 million kilometres.
Credit:NASA/JPL-Caltech
Many hundreds of potentially hazardous asteroids larger than 140 metres across have orbits that occasionally bring them closer to Earth than 7.5 million kilometres.
Credit:NASA/JPL-Caltech
