Smallest, densest white dwarf ever discovered packs the sun's mass into a moon-size stellar corpse

Astronomers may have discovered the smallest and heaviest white dwarf star ever seen, a smoldering ember about the size of our moon but 450,000 times more massive than Earth, a new study finds.

Source : https://www.space.com/moon-size-white-dwarf-smallest-densest-ever-discovered