Kasterborous

Kasterborous is the constellation in which the planet Gallifrey was located. (DW: Pyramids of Mars)

Behind the Scenes

 * It has been suggested that the design on the back of the TARDIS key (as worn by the Third Doctor, Fourth and Eighth Doctors) is a representation of the constellation, with Gallifrey's twin suns being the central star in the pattern.
 * The name Kasterborous was first mentioned in the revived series in DW: Voyage of the Damned.