The nebula is just sufficiently ionized by stars to provide the scattering of light to make the dust clouds visible. Reflection = Its easy to guess why they are called reflection nebula, they are dust clouds that reflect the light of nearby star. Ex: Orion Neubla, Eagle Nebula, Lagoon Nebula, Carinae Nebula, Veil Nebula, Trifid Nebula Usually these ionized gasses come from massive stars within the nebula. H II or Diffuse = Most nebulas can be classifed as diffuse, which refers to there being no specific boundries around these gas clouds, though these can be differentiated by the large amount of Ionized Hydrogen gas in their spectra.Įmmision = This type of nebula emits light on various wavelengths other than hydrogen. Crab Nebula, Eta Carinae Nebula, Barnard's Loop. Supernova Remnants = Formed after very large stars that have exploded at the end of their life. Ex: Cat's Eye Nebula, Hourglass Nebula, Helix Nebula, Eskimo Nebula. Planetary = formed from star that was probably around the size of our own sun underwent the final stages of its life shedding its outer shell of gasses. Ex: Rectangle Nebula, Oyster Nebula, Westbrook Nebula.
The star will continue to feed of the hydrogen envolope until it reaches a certain temperature at which it will ionize the gasses in the nebula and transforms into an Emmission Nebula.
Protoplanetary = a gas cloud containng one or more infant stars fromed from a hydrogen envolope, this young star sizzling at around 5,000 K produces strong winds that shape the nebula. There are many varieties of nebula out there.
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