Astronomers have discovered a star system boasting an atmosphere polluted by heavy elements, including calcium. Until now, most astronomers believe calcium-rich atmospheres were the results of a helium shell detonation on low-mass white dwarfs. The new study offers an alternative explanation.

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Astronomers have discovered a star system boasting an atmosphere polluted by heavy elements, including calcium. Until now, most astronomers believe calcium-rich atmospheres were the results of a helium shell detonation on low-mass white dwarfs. The new study offers an alternative explanation.