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Overlooked Treasure: The First Evidence of Exoplanets

1 Nov 2017, 22:14 UTC
Overlooked Treasure: The First Evidence of Exoplanets NASA/JPL-Caltech

This artist's concept shows an exoplanet and debris disk orbiting a polluted white dwarf. White dwarfs are dim, dense remnants of stars similar to the Sun that have exhausted their nuclear fuel and blown off their outer layers. By "pollution," astronomers mean heavy elements invading the photospheres -- the outer atmospheres -- of these stars.

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