Gallifrey (/ˈɡælᵻfreɪ/ or /ˈɡælᵻfriː/) is a planet in the long-running British science fiction television series Doctor Who. It is the original home world of the Doctor, The Master, and The Rani, as well as other Time Lords that have been seen in the show. It was located in a binary star system within the constellation of Kasterborous, at "galactic coordinates ten-zero-eleven-zero-zero by zero-two from galactic zero centre".