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At the end of the 22nd century Dalek invasion, the First Doctor warned that "the entire constellation" would be upset had the Daleks succeeded in their plot to pilot the Earth out of its orbit. (TV: The Dalek Invasion of Earth) The Time Lords "drew the Earth and its constellation billions of miles across space" in Operation Ravolox. (TV: The Ultimate Foe)
Behind the scenes
As acknowledged by The Discontinuity Guide, constellations in the real world are arbitrary divisions of stars in a planet's sky. As such, the Doctor and the Tremas Master's references to Earth's constellation would be from the viewpoint of a different planet, presumably their home planet Gallifrey.