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nebular theory (Stars (Massive Star (Much bigger than an average star, 10…
nebular theory
Stars
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Red Supergiant
When a massive star runs out of hydrogen, it will expand and make iron
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Neutron Star 
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Black Hole
Once you cross the event horizon, you can't escape the black hole
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Supernova
Galaxies
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Nebulae
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Solar System
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Planets
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Some may have life, no one knows
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