Scorpion Nebula

The Scorpion Nebula was a region of space in the other side of the universe to Earth. The planet San Helios was in the Nebula. At some point the Swarm generated a wormhole that transported them to San Helios and devoured every thing in site. Later the number 200 bus drove through a wormhole and also entered the nebula. (TV: Planet of the Dead)