GPT-4: Astronomers have discovered a crystallizing white dwarf star just 104 light-years away, which is transforming into a dense, cosmic diamond made of crystallized carbon and oxygen. This is the first crystallizing white dwarf whose total age can be externally constrained, allowing researchers to measure the cooling delay caused by core crystallization. The discovery suggests that similar systems containing crystallizing white dwarfs may be numerous, opening up new avenues for understanding this fascinating process.
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