galactic cepheid造句

"galactic cepheid"是什么意思

造句与例句手机版

In 1979, brightness variations were again noticed and V473 was listed as a short-period Cepheid, although the period was thought to be 3.04 days . The correct period was found a few years later at 1.49078 days, at the time the shortest known period for a galactic Cepheid.
It's difficult to see galactic cepheid in a sentence. 用galactic cepheid造句挺难的

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