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Nebula
  Images from Steve Bowers |
A huge, diffuse cloud of gas and dust in interstellar space. The gas is mostly hydrogen (H2).
Bright nebulae glow with light emitted by the gas of which they are composed (the emission nebulae) or by reflected starlight (the reflection nebulae) or both.
Dark nebulae consist of clouds of gas and dust that are not illuminated.
Protoplanetary nebulae are condensations of gas and dust in the process of forming a star and solar system
The archaic term Planetary nebulae refers to shells of gas ejected by exploding stars. Spiral nebulae was an Old Earth term for galaxies.
Related Articles
- Boomerang Nebula
- Cloudharvesters
- Coal Sack Nebula
- Cygnus Loop
- Dark Nebulae
- Dumbbell Nebula
- Eagle Nebula
- Emission Nebula
- Eta Carinae Nebula - NGC 3372
- Golifa Nebula
- Gum Nebula
- Horsehead Nebula
- Hubble's Variable Nebula
- Lagoon Nebula
- Laughter Nebula - Text by Anders Sandberg
One of the five nebulae in the volume close to the War and Peace Nebula named after the Rational Virtues (Laughter, Curiosity, Zeal, Reflection and Compassion) in Konensis Mysticism. - Orion Nebula
- Planetary Nebula
- Rosette Nebula
- Trifid Nebula
- Verifex Nebula
Appears in Topics
Development Notes
Text by M. Alan Kazlev
Initially published on 09 December 2001.
Initially published on 09 December 2001.
