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14 May, 14:27

Arrange the events in the life of a star in correct order

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  1. 14 May, 14:53
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    The temperature increases in the center of a nebula, and nuclei begin to fuse.

    As the nuclear fusion sets off a chain reaction, the nebula gets hotter and brighter and turns into a star.

    The star stays in the main sequence stage for a long time.

    The star runs out of hydrogen and turns into a planetary nebula or a supernova, depending on its mass.

    Heavy elements are created when the supernova explodes.

    The temperature increases in the center of a nebula, and nuclei begin to fuse.
  2. 14 May, 16:09
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    Stellar nebula, star, red giant, planetary nebula and then a white dwarf.
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