Dawn

Dawn is a space probe launched by NASA with the mission of studying two of the three known protoplanets of the asteroid belt, Vesta and Ceres. Dawn is the first spacecraft to orbit two extraterrestrial bodies, the first spacecraft to visit either Vesta or Ceres, and the first to visit a dwarf planet, arriving at Ceres in March 2015, a few months before New Horizons flew by Pluto in July 2015.