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The start of the Universe
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Quark and electron are formed because of BigBang
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3quarks bond themselves and form proton and neutron. 1 proton=hydrogen
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2proton=helium
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Because of nuclear formed, it catches electrons
Hydrogen:Helium=3:1 -
Because of gravity, particles gather together, and they rotate in the same direction.
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Because of the sun's formation, there is no more sufficient hydrogen and helium to form. In rotating disk, the small portion part which is Nickel and Iron has become nuclear from nuclear fusion.
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After all nuclear fusion stop because of decreased temperature in the Universe, Atmosphere forms
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moon formed