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
A nebula (from Latin: mist [1]; pl. nebulae or nebulae, nebulÃ¦ with ligature or) nebulas is an interstellar cloud of, dust hydrogen gas and. Plasma it is the first stage of a'star s. cycle