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BPM 37093 (Diamond Star)

The interior of this probably very old white dwarf is a diamond with a diameter of more than 4000 kilometers.
The inside of white dwarfs often is pure carbon. The pressure in this star has agglomerated it to form a diamond.

Constellation: Centaurus
Distance: 54 light-years
Spectral class: DA6
Visual magnitude: 13.96
Luminosity: 0.0006 * Sun
Diameter: 0.0029 * Sun
Radial velocity: -12 km/sec

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    BPM 37093
Source: Harvard-Smithsonian Center for Astrophysics / Travis Metcalfe, Ruth Bazinet

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