Scorpion Nebula
From Tardis Wiki, the free Doctor Who reference
The Scorpion Nebula was a region of space in the other side of the Universe to Earth. The Nebula is the location of the planet San Helios. At some point The Swarm generated a wormhole that transported them there to San Helios and devoured every thing in site. Later the number 200 bus drove through a wormhole and also entered the nebula. (DW: Planet of the Dead)
