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An ultramassive white dwarf half Earth's size may hold a rare oxygen-neon core

• wglb 2mo ago
  Paper in Astrophysical Journal https://iopscience.iop.org/article/10.3847/1538-4357/ae7f0b https://iopscience.iop.org/article/10.3847/1538-4357/ae7f0b