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Earlier this year, astronomers watched a nova explosion blast off the surface of a white dwarf star in the system RS Ophiuchi. Located 5,000 light-years from Earth, RS Ophiuchi consists of a white dwarf and a red giant star locked in orbit - the white dwarf might actually be orbiting within the envelope of the red giant. But this nova was just the taste of what's to come. The white dwarf is drawing material away from the red giant, and it will eventually gather enough mass to explode as a supernova.
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