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I think the solar nebula theory.
That is called an accretion disk or a proto-Solar system.
Triffid Nebula, Eagle Nebula, Cat's Eye nebula
I don't really know but the density level is 10.54
Emission nebula glow and reflection nebula reflect the light form other stars
The nebula theoryi think it's the passing star theory
The Big Bang Theory
In order to answer your question we need to know the theory
I think the solar nebula theory.
What does it mean that a theory or model is workable
The correct term is planetary nebula. Such nebulae form when a low to medium mass star dies.
No forces will act on the particles and the particles will drift apart. I don't know if im correct.
Interstellar dust
That is called an accretion disk or a proto-Solar system.
the evidence that the phlogistan theory was correct was that there was heat and by the way this is definetly correct
The correct spelling is 'theory'.
The Crab Nebula is a nebula.