| 释义 |
CepheidsCOCA⁵⁵⁰⁴³BNC¹¹⁴⁰²⁴⁺⁵
基本例句
n.仙王变星群¹⁰⁰原型cepheid的复数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。
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”。
The pulsation ofcepheidsis known to be driven by oscillations in the ionization of helium .异常的发射或吸收谱线暗示可能有恒星附近有高温恒星大气或气体云。事实上少数例子中可想像具有恒星盘。这些也许显示其表面具有暗点。
To reduce the uncertainty in Virgo’s distance, Freedman and her colleagues will search for Cepheids in two other galaxies in Virgo.为减少室女星团距离计算上的不确定因素，弗里德曼及其同事准备在室女星团的另两个星系内寻找造父变星。
Such stars periodically wax and wane in brightness: the longer a Cepheid’s period the bigger and brighter it is.这类星的亮度有周期性盈亏：周期越长，该造父变星体积就越大，亮度也越高。
The most impossible energy hit method is launches a bunch of energetic particle to thecepheidvariable, like neutrion.最有可能的能量撞击方法就是向造父变星发射一束高能粒子，如“微中子”。 |