Pluto

Pluto is a large celestial object in the Solar System, and the second-largest known dwarf planet (after Eris) as well as the tenth-largest body observed directly orbiting the Sun. It was named after the Roman God of the Underworld. The Remote Scanning Outpost Democritus is on this Dwarf Planet. On November 3, 2552, the Monitoring Station detects Cortana's signal in Slipspace with Dr. Halsey's message to Lord Hood.

Known History
Pluto was discovered in 1930, then thought to be the ninth and final planet of our Solar System. Its first moon, Charon, was discovered in 1978. In 2005, 2 more smaller moons were discovered. And the following year, 2006, debates over it's celestial status were discussed by the IAU(International Astronomical Union), and reclassified Pluto to a Dwarf Planet status, along with the largest known Asteroid, Ceres and another larger TNO,(Trans-Neptunian Object) Eris, while the other 8 planets, or more specifically, the 8 Major planets, remain the same status. In early 2007, the New Horizons spacecraft was launched to Pluto, becoming the first spacecraft to visit Pluto in late 2014-middle 2015.

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