The Lavender Nebula is a huge gas nebula that dominates the night sky of Oz. It takes its name from the dominate color of the gas. It is roughly centered on 1/-17 the nebula runs for 40 light years, 15 light years wide from the spinward core to the anti-spinward rim.
It is also a star Nursery. In recent memory two stars have lit off in the nebula.
It is also a producer of weirdness. The ISS Dannon came out of the nebula, a stable Mirror Universe event. It has some kind of connection with the Ghostlands, tossing ships at Oz from various points in the past.
Driving through the nebula at warp is a sure way to make sure the whole Galaxy knows right were you are.