Content loaded! Viewing article Galactic Centre on Galactipedia in language English This article is not to be confused with the Galactian Centre, which is a building on a planet. If everything orbited the Galactian Centre, then that would break the laws of physics as we know it. The Galactic Centre is a supermassive black hole in the middle of the The Field of Stars. Most species evolve in an area between 4 and 10 kpc of the Galactic Centre. The Galactic Centre has a diameter of approximately 60 million kilometres. For unknown reasons, the radio wave emissions from the black hole appear to be sourced from outside the black hole itself. There is also a gas cloud which has accreted around the Galactic Centre. The black hole is monitored constantly from the Galactian Centre.