Dawn probe reaches milestone approaching asteroid Vesta
Tuesday, May 3, 2011 - 17:00
in Astronomy & Space
(PhysOrg.com) -- NASA's Dawn spacecraft has reached its official approach phase to the asteroid Vesta and will begin using cameras for the first time to aid navigation for an expected July 16 orbital encounter. The large asteroid is known as a protoplanet a celestial body that almost formed into a planet.