When an asteroid threatens Earth, astronomers use a rating called the Torino scale to communicate the risk. Richard Binzel, ...

"This is four times more people than saw Neil Armstrong walk on the moon. Think about what a world event this is going to be." An asteroid once thought to pose a threat to Earth may be visible to the ...

If an asteroid is on a collision course with the moon, what should humanity do? Try to nudge the space rock out of the way before it strikes? Obliterate it with a nuclear explosion? Such a cosmic ...