A white dwarf is the stellar core left behind after a dying star has exhausted its nuclear fuel. A new study used data from powerful X-ray missions, NASA’s Chandra X-ray Observatory and the Euro ...
The brightest star in the nighttime sky, Sirius, or the Dog Star, greatly outshines its white dwarf companion, Sirius B. At 8.6 light-years away, Sirius B is the nearest known white dwarf star to ...
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