Sagittarius A* was a supermassive black hole. (PROSE: Love & War [+]Loading...["Love & War (short story)"]) It was located at the centre of the Milky Way.
The Second Doctor once speculated that Raet-Tawy, a Schwarzschild black hole, would one day plunge into Sagittarius A*. (AUDIO: The Dead Star [+]Loading...["The Dead Star (audio story)"])
In her 2323 paper Love & War: A Meta-Historical Investigation of the Dawn of the Cosmic Revolution, Dr Olivia Kagg Waldermein stated that the black hole "hover[ed] menacingly at the legendary coordinates of the Gods' Base of Operations", the former home of the Lesser Time Elementals, "and, as far as current history [was] concerned, it always ha[d]". (PROSE: Love & War [+]Loading...["Love & War (short story)"])