Astronomer Professor Alan Fitzsimmons from Queen's University Belfast, discusses planetary defence missions to learn how to deflect asteroids which may strike the Earth.
Some of these asteroids have little chance of hitting us but there are a few with very real chances of making contact. What happens if a large asteroid or comet hits Earth? 30 NFL Stadiums Ranked ...
"Apophis quickly gained notoriety as an asteroid that could pose a serious threat to Earth when astronomers predicted that it would come uncomfortably close in [Friday, 13 April] 2029," NASA ...