而且，伦德博士测算出“造父变星”的脉动周期能够用适当的微中子束加以调整。
Dr Learned, however, reckons the pulse-period of a Cepheid could be modulated by a suitable beam of neutrinos.
造父变星是可靠的宇宙距离(测量)里程碑，其完整的一个光变周期直接反映了星体的本质光亮度。
Cepheids are reliable cosmic distance mileposts. The interval it takes for the Cepheid to complete one pulsation is a direct indication of the stars'; s intrinsic brightness.
太阳是不被认为是变星，但它的变化进行定期的活动被称为太阳黑子周期。
The sun is not considered a variable star, but it does undergo periodic changes in activity known as the sunspot cycle.
在造父变星的一个光变周期内，恒星外层的电离气体是相对不透明的，因此会吸收恒星的辐射而升温，并开始向外膨胀。
At the dimmest part of a Cepheid's cycle, the ionized gas in the outer layers of the star is opaque, and so is heated by the star's radiation, and due to the increased temperature, begins to expand.
变星的一种，它的固有光度和它的光变周期有着紧密的联系。
A type of variable star whose period of variation is tightly related to its intrinsic luminosity.
变星的一种，它的固有光度和它的光变周期有着紧密的联系。
A type of variable star whose period of variation is tightly related to its intrinsic luminosity.
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