An ultramassive white dwarf half Earth's size may hold a rare oxygen-neon core (phys.org) 7 points by wglb 1mo ago ↗ HN
[–] wglb 1mo ago ↗ Paper in Astrophysical Journal https://iopscience.iop.org/article/10.3847/1538-4357/ae7f0b
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