type of variable star, 1904, from Delta Cephi, the name of the first such star identified, which is in the dim northern constellation Cephus, named for Greek Kepheus, a mythical king. With -id.
双语例句
1. Cepheid variable stars are stars whose brightness changes at regular periods.
造父变星是一种光线按规律周期发生变化的恒星.
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2. His first great discovery was made when he recognized a Cepheid variable star.
