Pluto’s moons tumble in orbit, Hubble measurements reveal

Analysis of ten years of data from the space telescope has revealed the unusual trajectories, and also suggests Pluto might in fact be a binary dwarf planet. Pluto’s moons have been tracked closely for the first time, showing that they tumble unpredictably rather than keeping one face fixed on their…

NASA Spacecraft Becomes First to Orbit a Dwarf Planet

NASA’s Dawn spacecraft has become the first mission to achieve orbit around a dwarf planet. The spacecraft was approximately 38,000 miles (61,000 kilometers) from Ceres when it was captured by the dwarf planet’s gravity at about 4:39 a.m. PST (7:39 a.m. EST) Friday. Mission controllers at NASA’s Jet Propulsion Laboratory…