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Dwarf nova
Cataclysmic variable star, consisting of a close binary star system / From Wikipedia, the free encyclopedia
A dwarf nova (pl. novae), or U Geminorum variable, is one of several types of cataclysmic variable star, consisting of a close binary star system in which one of the components is a white dwarf that accretes matter from its companion. Dwarf novae are dimmer and repeat more frequently than "classical" novae.[1]
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