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Region of interstellar hydrogen. Gravitational collapse. Ignition (fusion). Inward gravitational forces. Outward pressure from fusion. “Onion shell structure of a massive star”. H. He. C,O,N,Ne,Mg. Si,S,Cl,Ar,K,Ca. Ti,V,Cr,Mn,Fe,Co,Ni. H, He rich “normal” star. Neutron star.
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Region of interstellar hydrogen Gravitational collapse Ignition (fusion)
Inward gravitational forces Outward pressure from fusion
“Onion shell structure of a massive star” H He C,O,N,Ne,Mg Si,S,Cl,Ar,K,Ca Ti,V,Cr,Mn,Fe,Co,Ni
H, He rich “normal” star Neutron star