As the white dwarf eats orbits the sun-like star and eats away its light hydrogen, the sun-like star should burn out, leaving a core of helium an element that is more dense than hydrogen, and heavy enough to keep the dead star in a tight, ultrashort orbit
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By Will Dunham WASHINGTON (Reuters) - Unlike the lonely sun, about half the stars in our Milky Way galaxy are in a long-term committed relationship wi.