造父变星
- 与 造父变星 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Cepheid variable stars – a class of stars named in honor of Delta Cephei – serve as cosmic yardsticks, enabling astronomers to measure the distances to faraway galaxies.
造父变星——以Delta Cephei的名义命名的一类星——充当宇宙的标尺,使得天文学家可以测量与更为遥远的星系之间的距离。
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The SHOES team used Hubble's Near Infrared Camera and Multi-Object Spectrometer and the Advanced Camera for Surveys to observe 240 Cepheid variable stars across seven galaxies.
SHOES团队使用哈勃望远镜的近红外相机和多目标光谱仪、高级巡天相机观测了综括7个星系的240颗造父变星。
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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.
造父变星是可靠的宇宙距离里程碑,其完整的一个光变周期直接反映了星体的本质光亮度。
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The new technique reduced the distance ladder to three "rungs":(1) The distance to galaxy NGC4258 is measured using straightforward geometry and Kepler's laws;(2)Cepheids in six more distant galaxies are used to calibrate the luminosity of Type Ia supernovae;(3) The Hubble constant is measured by observing a brighter milepost marker, Type Ia supernovae, in more distant galaxies hundreds of millions of light-years away, embedded in the expanding universe.
这种新技巧简化了距离跳跃为三个"阶梯":1、星系NGC 4258的距离采用开普勒定律和简单直接的几何方法精确测量;2、在6个更远的星系中的造父变星用来校准Ia超新星的光度;3、深嵌于数亿光年外的膨胀宇宙中的星系中的Ia超新星——一种遥远而明亮的量天尺,被用于精确测定哈勃常数。
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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.
在造父变星的一个光变周期开始时,恒星最暗,此时其外层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。
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Cepheids dim and brighten regularly, in a pattern that depends on their brightness.
造父变星依据它们的亮度有规律的变明变暗。
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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&。
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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。
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IUsing 146 cepheids selected from the data listed by Kraft and Schmidt,the variation of Δω with R is computed by means of Camm's method.
i利用克拉夫特和施密特列出的造父变星资料中146个星的资料,用加姆方法计算了Δω随 R 的变化。
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With Hubble's powerful capabilities, the team was able to side step some of the shakiest rungs along the previous distance ladder involving uncertainties in the behavior of Cepheids.
有了哈勃望远镜的强大能力,团队就能直接跨过某些不稳定的台阶:先前对这些造父变星行为的观测不是很准确。
- 推荐网络例句
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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.
Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。
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I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.
我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。
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The shamrock is the symbol of Ireland and of St.
三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。