The Roqoo System has death written all over it. Many centuries ago the Hapans used this system as a decoy for enemies. They set up mass mines in the nebula which prevented ships from entering hyperspace, the nebula itself interfered with the ships systems leaving them stranded, lost and and helpless against the Hapan Royal Navy. After the mines were depleted and the system's decoy function became obsolete the Hapans seem to have abandoned the system, so almost no Hapan vessels come here anymore. After some time ship debris and wrecks started to orbit the mines and with time the nebula itself began to spin.
Some claim there are stranded vessels floating aimlessly within the nebula, that are filled with great wealth, prompting treasure hunters, soldiers of fortune and adventurers risking their lives to get their greedy hands on those valuables. A very dangerous endeavour indeed as the many debris, wrecks and spaceship parts that have assembled over the centuries have enhanced the interference level of the nebula, thus making navigation a nightmare.
Entering the nebula a pilot practically has to rely on his eyesight and quick reflexes only, as all readings of the ship's instruments become unreliable at best. The vast majority of ships crazy enough to enter the nebula are never seen again. The ghostly thing that remains is, that some of the destroyed and lost ships comm lines still send distress signals, which can be picked up once in a while. An eery reminder of the dangers that lurk within that nebula.
Some pilots claim it's easier to navigate an asteroid field than the Roqoo-Nebula, often just referenced as "The Nebula of Doom".