This artist’s concept shows NASA’s Dawn spacecraft arriving at the dwarf planet Ceres, the most massive body in the asteroid belt. Dawn is the first mission to visit a dwarf planet—a round body that orbits the sun but, unlike a planet, does not clear its orbital path of other objects. – NASA/JPL-Caltech

Related channels: CERES, ASTEROIDS, DWARF PLANETS, PLUTO, NASA, JUNO (NASA SPACECRAFT), NEW HORIZONS (NASA SPACECRAFT)