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The universe's most extreme dead stars can form from vampire white dwarfs. Scientists now know how

Some vampire white dwarfs can transform into neutron stars, but like a cosmic Goldilocks, conditions must be "just right" for this extreme makeover.
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'Extreme' white dwarf sets cosmic records for small size, huge mass

WASHINGTON (Reuters) - In their death throes, roughly 97% of all stars become a smoldering stellar zombie called a white dwarf, one of the densest objects in the cosmos. A newly discovered white dwarf ...