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.
novae), or U Geminorum variable, is one of several types of cataclysmic variable stars, consisting of a close binary star system in which one of the components is a white dwarf that accumulates matter from its companion.