Uranus

Uranus (or Sol VII) was the seventh planet in the Sol system. A lengthy mining operation found taranium deposits there, which powered the Time Destructor.At this time Uranus was referred to as a "dead planet", implying previous occupation that had ended. (TV: The Daleks' Master Plan)

In 4010, representatives of various races including the Ice Warriors, Pakhars, Alpha Centaurans, and Guermantians, went to Cressida to watch a rare chemical reaction in the atmosphere of Uranus. (PROSE: Uranus)