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Physical Environment > Gas |
This site tells the story of the history of the universe. Click Earlier and Later to follow the story. Note: Many facts have been simplified to make them easier to understand. |
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A gas is a collection of atoms (and perhaps molecules) moving about in space and sometimes hitting each other. The gas is hot because of the movement energy of the atoms and molecules it contains -- the faster they move the hotter the gas.
The young Universe was filled with a gas of hydrogen and helium atoms. |
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Physical Environment > Gas |
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Basic Information |
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