Solar system

The solar system was a star system centred on the star called Sol in the galaxy known as the Milky Way or Mutter's Spiral.

It was home to several planets on which life had originated, including Earth, Venus and Mars. (AUDIO: Exploration Earth, TV: Doctor Who and the Silurians, PROSE: The Dalek Book, AUDIO: Voyage to Venus, TV: The Ice Warriors, The Waters of Mars) Additionally several of its other planets and moons were eventually colonised, principally by humans. (TV: The Invisible Enemy, The Sun Makers) After a long struggle both on their own planet, Earth, and with other sentient species in the system, humans became the region's dominant species and led several different inter-planetary governments. (TV: The Daleks' Master Plan, The Monster of Peladon, Bad Wolf) Indeed, the solar system's significance was largely tied to the fate of humanity, since humans became one of the universe's longest-lived species, continuing on until the universe itself was entering its final stage of development. (TV: The End of the World, Utopia)

Behind the scenes
The term solar system can also be a simple synonym for star system in DWU fiction. However, in most instances, solar system—even though uncapitalised—refers to "the star system bound together by Sol".