South polar region of the giant asteroid Vesta. NASA/jPL-Caltech/Getty Images When the detection of the asteroid was announced last month, NASA predicted just a 1.3% probability of it hitting Earth.

NASA/JPL-Caltech/UCLA/MPS/DLR/IDA NASA's Dawn spacecraft took this image of Ceres' south polar region on May 17, 2017.

NASA is tracking a bus-sized asteroid zipping ... Asteroids are known to range in size from around 329 miles in diameter (i.e. Vesta, which accounts for 9 percent of the total mass of all ...

NASA is tracking a house-sized asteroid set to ... Their sizes vary significantly, from Vesta—the largest, measuring about 329 miles (530 kilometers) in diameter—to much smaller bodies less ...

Since entering orbit last month, Dawn has taken more than 500 images Vesta's southern section is dominated by a giant crater The northern side is filled with older craters including three that ...

Vesta, with a diameter of between 460 and 580 kilometres, is the third largest asteroid. It rotates around its own axis in five hours and 20 minutes, and requires 3.6 Earth years to complete an orbit ...

NASA's Dawn spacecraft was the first spacecraft to orbit two extraterrestrial bodies, Vesta and Ceres. But what did it do and discover while it was there?