There was no reason for alarm, as a NASA engineer called it "one of the closest approaches by a known near-Earth object ever recorded." It was only 2,200 miles above the Earth's surface.

NASA successfully crashed a spacecraft into an asteroid in a test of planetary defense. Now it will determine whether the mission was able to alter the asteroid's course.

A NASA mission to a potentially dangerous asteroid has let researchers map out its future trajectory like never before.

A NASA spacecraft sent out to collect rocks from an asteroid seems to have nabbed a lot of material, but there's now an unexpected problem — a flap isn't closing because some rocks are stuck.

NASA has collected and is returning its first sample from an asteroid. The rocks and dust could help us understand potentially dangerous space rocks and the history of the solar system.