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The story starts with quantum field theory, which is incredibly complex, but the simplified version is that even empty space is filled with fields that could govern the interactions of any quantum objects in or near that space. You can think of different particles as energetic excitements of these fields—so a photon is simply an energetic state of the quantum field.
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; while the PLA is still evaluating
When the star eventually releases its outer layers, it shrivels down to its core in what's known as a white dwarf star. At that point, it'll be about the size of Earth.
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