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A star in the constellation Centaurus has a diamond core 4,000 km wide
✦ Deep diveAstrophysics

A star in the constellation Centaurus has a diamond core 4,000 km wide

Forty-eight light-years from Earth sits BPM 37093, a white dwarf that astronomers have nicknamed Lucy. Its interior has crystallized into a single carbon lattice 4,000 kilometers wide. It is, in the most literal sense, a diamond the size of a small moon.