cepheids

cepheids

美 　英

• na.【天文学】造父变星
• 网络仙王流星群；王变星群

词形变化

复数：cepheids  

英汉解释

na.	1. (variable) 【天文学】造父变星

英英解释

n.	1. a star that has regular periods of varying brightness, usually lasting from one to fifty days

例句

Although Cepheids are rare, they provide a very reliable "standard candle" for estimating intergalactic distances.

虽然造父变星数量稀少，它们是估计银河系间距离的一种非常可靠的“标准烛光”。

For 100 years astronomers have paid particular attention to a class of variable star known as the Cepheids.

过去100年来，天文学家特别注意一类称作“仙王座变光星”的恒星。

Dr. J. : Astronomers have used Hubble to observe cepheids and to pin down their distances much more accurately.

博士：天文学家已应用哈勃望远镜来观测“造父变星”并以此更准确地计算出它们的距离。

Observations of distant Cepheids such as those in NGC 4603 also help astronomers to precisely measure the expansion rate of the universe.

观测造父变星的距离也有助于天文学家准确测量宇宙膨胀速度。