It can be tempting to think of the stars that light up the sky each night as timeless. Astronomy professor John Thorstensen knows better. He has spent the last four decades studying cataclysmic binary stars, a pair of stars circling each other in close range: a smoldering dead star known as a white dwarf, and a star like our sun, in the prime of its life, that’s been pulled into the dead star’s orbit.
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Source: Phys.org