It's the first spacecraft to orbit two different celestial bodies and the first to orbit dwarf planet.
http://www.space.com/28754-nasa-dawn-ceres-dwarf-planet-arrival.html
Pluto flyby occurring later this year. Good times.
http://www.space.com/28754-nasa-dawn-ceres-dwarf-planet-arrival.html
Pluto flyby occurring later this year. Good times.