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| Then when the tempeture reaches 18 billion degrees it ofcially becomes a star on the main sequence. | |
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| It's the point in which a star is trying to reach equilibrium, fighting against gravity to maintain stable. A star lives most of its life in this stage. | |
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| A star's life span depends on how much mass it has. | |
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| so what's the difference between the different masses ? | |
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