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Believe it or not, the stars in the sky all go through life cycles like you and me.
It stars with a molecular cloud, or stellar nursery, where gravity makes dust and gas condense into stars.
The stars begins to fuse elements together in its core. This fusion fights against the always-present force of gravity pushing in. The star lives in this stage for most of its life. It may even have planets!
Over time, the star will run out of elements to fuse. It may begin to fuse heavier elements together and become a red giant. Eventually, gravity will win. The shell of the star will explode off into a nebula, and the star will become a dense white dwarf.
Sometimes, the shock of fusion ending is so overwhelmed by the force of gravity that the star can implode on itself, which is called a supernova. For a few seconds, this can be bright enough for light years around.
So the next time you take a look outside, remember that those stars are all going through life cycles.
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