1. A small emission nebula NGC 6729 extends from star towards SE. 2. It is classified as an emission nebula and as a H II region. 3. Star-forming regions are a class of emission nebula associated with giant molecular clouds. 4. N44 is classified as an emission nebula because it contains large regions of ionized hydrogen. 5. Sharpless 2 115 is another emission nebula with a complex pattern of light and dark patches. 6. Outer parts of the cluster intimately involving pillars of emission nebula NGC 6820, contain even younger stars. 7. :: : Those nebula are emission nebulas wich emit light at particular wavelengths in a line spectrum. 8. HD 165516 is close to a small reflection and emission nebula , and an associated loose open cluster. 9. V4381 Sagittarii is associated with a small reflection and emission nebula , although it is not actually seen within the nebulosity. 10. The Gum Nebula is a faint emission nebula , believed to be the remains of a million-year-old supernova.
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