How are galaxies, clusters, and nebulas different?
1 Answer
Nebula: Interstellar Clouds of Dust, Gas, or Both; Clusters: Please define; Galaxies: Stars, SNR's, Blackholes, Star Clusters, you name it held together by gravity.
Explanation:
Nebula:
- Collections of dust, gas, or both.
- Do not emit light themselves
- There are five types;
1. Reflection (Collections of dust/gas that reflect light)
2. Emission (Same thing as Reflection but are illuminated by the microwave radiation from a nearby star(s))
3. Planetary (which has nothing to do with planets-rather it's remnants of a low to medium mass star {akin to Supernova, but WAY different})
4. Super Nova Remnants (SNR's) (Remnants of Supernova-Like Planetary Nebula)
5. Dark Nebula ( Same as Reflective & Emission but they block out all light from behind)
Cluster:
- There are lots of types of Clusters, ranging from;
Star clusters (Clusters of stars)
Galaxy Clusters (Clusters of Galaxies)
Basically Clusters of anything
Galaxies:
- Basically "gravitationally bound" stuff. By stuff I mean everything above and more (except galaxy clusters {Correct term: Galaxy Superclusters})