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Colliding White Dwarfs Produced Bizarre Slime-Green Zombie Star – ScienceAlert

A white dwarf isn’t your typical kind of star.

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A white dwarf isn’t your typical kind of star.
While main sequence stars such as our Sun fuse nuclear material in their cores to keep themselves from collapsing under their own weight, white dwarfs use an effect known as quantum degeneracy. The quantum nature of electrons means that no two electrons can have the same quantum state.
When you try to squeeze electrons into the same state, they exert a degeneracy pressure that keeps the white dwarf from collapsing.
But there is a limit to how much mass…

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