Astronomers have discovered a Moon-sized white dwarf more massive than the Sun

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Chenoa van den Boogaard, Physics & Astronomy editor   Astronomers have discovered the smallest white dwarf yet, and it is helping them to understand the lifecycle of these celestial objects. White dwarfs are what remain when low-mass stars reach the end of their life. After around 10 billion years of turning hydrogen into helium through […]

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