According to the space agency's tracking, the rock is hurtling through space at more than 21,500 miles per hour.

Here's what scientists have now learned about the DART mission.

Scattered between the orbits of Mars and Jupiter lies the main asteroid belt — a vast region filled with rocky remnants left over from the birth of the solar system. These objects, known as ...

When NASA’s Dawn spacecraft finally reached the giant asteroids Vesta and Ceres, scientists expected simple rocky worlds. Instead, the mission revealed mysterious bright spots, signs of icy eruptions, ...