NASA's Dawn spacecraft arrived at asteroid Vesta in the asteroid belt on Saturday (July 16) after a four-year trek. Dawn will explore Vesta and the asteroid Ceres, in space firsts.

An unmanned NASA probe made history 117 million miles from Earth on Saturday, July 16, when it arrived at the huge asteroid Vesta, making it the first spacecraft ever to orbit an object in the ...

Because Vesta completes one rotation or "day," every five hours and 20 minutes, Dawn will be able to observe the asteroid's entire illuminated surface every orbit.

An unmanned NASA probe made history 117 million miles from Earth on Saturday (July 16) when it arrived at the huge asteroid Vesta, making it the first spacecraft ever to orbit an object in the ...

NASA's Dawn spacecraft is set to orbit the huge asteroid Vesta late Friday, July 15 (PDT). Dawn project manager Robert Mase talks about this orbital rendezvous, and what comes next for the spacecraft.

On Saturday, NASA'a Dawn spacecraft entered orbit around the asteroid Vesta, becoming the first probe ever to enter orbit around an object in the main asteroid belt between Mars and Jupiter.

NASA's Dawn spacecraft reached orbit around Vesta in July 2011, and spent over a year collecting data on the asteroid's composition, geology, craters, and countless other features before departing ...

The giant asteroid Vesta got clobbered not once but twice, and it has the scars to prove it. Ever since the Hubble Space Telescope spied a huge depression in the asteroid's south pole, scientists ...

The debate over whether the giant asteroid Vesta has a moon could soon be decided. NASA's Dawn spacecraft will go into orbit in mid-July, when it will take the best-ever photographs of the big ...

NASA's Dawn spacecraft should now be circling the massive asteroid Vesta -- if everything went according to plan. Dawn was slated to slip into orbit around Vesta, the second-largest object in the ...

An unmanned NASA probe made history 117 million miles from Earth on Saturday (July 16) when it arrived at the huge asteroid Vesta, making it the first spacecraft ever to orbit an object in the ...