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NASA's "Dawn" spacecraft exhausts all of its hydrazine fuel propellant and without a functioning maneuvering system enters into uncontrolled motion around dwarf planet Ceres, thus ending its 11-year mission.
2018-11-1

Pluto, the eponymous member of the plutino group, is discovered to have dunes of methane ice.
2018-05-31

"Nature" publishes research from The Institute of Astrophysics of Andalusia at the Glorieta de la Astronomía of Granada, Spain, describing the discovery that a ring system orbits the trans-Neptunian dwarf planet Haumea.
2017-10-11

NASA announces the return of the final piece of data collected during "New Horizons"' flyby of Pluto in July 2015. The data, taking about five hours at light speed to travel across 5.5 billion kilometers (3.4 billion miles), arrived at the Johns Hopkins Applied Physics Laboratory on the morning of October 25.
2016-10-27

Astronomers announce the discovery of V774104, the most distant object yet found in the Solar System, a dwarf planet orbiting at three times the distance of Pluto.
2015-11-11

NASA publishes the first close up photos of Pluto from the New Horizons spacecraft. They show geologically young mountains made of water ice.
2015-07-15

NASA's "New Horizons" spacecraft completes a historic flyby of the dwarf planet Pluto and its five moons. Measurements, along with many high-quality photos and reams of data, were taken, including conclusive information regarding the diameter of Pluto and its moons.
2015-07-14

NASA releases new pictures from the Dawn spacecraft as it approaches from a distance of 238,000 miles of Ceres, the largest object in the asteroid belt between Mars and Jupiter. Dawn will go into orbit around the dwarf planet on March 6.
2015-01-19

NASA's New Horizons spacecraft reawakens at 20:00 UTC in preparation for observing the dwarf planet Pluto and its satellites. New Horizons, launched on January 19, 2006, will begin distant observations on January 15, 2015, culminating with its July 14, 2015 closest approach flyby.
2014-12-6

Astronomers announce the discovery of S-2012 P 1, the fifth moon of Pluto.
2012-07-11