Diocese definition, an ecclesiastical district under the jurisdiction of a bishop. See more.
planetary nebulae represented here by the ring nebula are examples of emission nebulae an emission nebula is a nebula formed of ionized gases that emit light of various colors the most common source of ionization is high energy photons emitted from a nearby hot star
The Carina Nebula, a large, bright emission nebula. Image Credit: ESO. The Carina Nebula (also known as NGC 3372, the Great Nebula in Carina and the Eta Carinae Nebula) is a large, bright emission nebula of about 260 light-years across, located roughly 7,500 light-years away from Earth in the CarinaâSagittarius Arm of our Milky Way Galaxy, in the southern constellation of Carina (the Keel).