Wikipedia There is more information available on this subject at Pluto on the English Wikipedia.

Pluto, formal designation 134340 Pluto, is a celestial object in the Sol system, and the second-largest known dwarf planet (after Eris) as well as the tenth-largest body observed directly orbiting Sol.


Several military and scientific stations orbit Pluto.[1]

On November 3, 2552, the Democritus Monitoring Station detected Cortana's signal in Slipspace with Dr. Halsey's message to Lord Hood.[2]


Orbital LocationsEdit



  1. Halo Encyclopedia, page 283
  2. Halo: Ghosts of Onyx - page 212
  3. Halo: Evolutions: The Impossible Life and the Possible Death of Preston J. Cole - page 458