cepheid 中文意思是什麼

cepheid 解釋
（variable） 【天文學】造父變星。

  1. The longer the period, the brighter the star is. thus, by measuring the period of a cepheid variable, we know its absolute magnitude, hence, we can tell how far it is away by comparing with its apparent magnitude

    所以，只要知道某一造父變星的周期，我們便可得知它的絕對星等，只要和它的視星等作比較，便可以求得它和我們的距離。
  2. Cepheid variable is the foundation of this ladder

    ，而造父變星便是這階梯中不可或缺的其中一環。
  3. Cepheid variable stars are stars whose brightness changes at regular periods

    造父變星是一種光線按規律周期發生變化的恆星。
  4. Double - mode cepheid

    雙模造父變星
  5. This makes space telescope invaluable for identifying a rare class of pulsating stars, called cepheid variable stars embedded within m100 ' s spiral arms

    這對于從m100的旋臂中分辨出暗藏的造父變星有著莫大價值。
  6. One of the key project of hubble s telescope is to gauge as many cepheid variables as possible in more distant galaxies up to 65 millions light years

    哈勃太空望遠鏡的一個重點計劃，就是要測量更多更遠星系中的造父變星遠達
  7. Since delta cephei was one of the earliest members of a special kind of variables being discovered, all variables in this family are called cepheid variables or simply cepheids

    星的中國名稱為造父一，由於它最早被發現的一種新變星類別，所以這類變星皆稱為造父變星。
  8. Cepheid variables are dimmer than the type i supernova. as a result, the supernova allows us to measure the distances of galaxies further away, but it happens much less often

    I型超新星比造父變星光亮，所以能夠量度更遙遠星系的距離，唯一缺點是不經常有i型超新星爆發。
  9. Astronomers made observations of cepheid variable stars [ pictured above ] ? pulsating stars used to measure vast distances ? in the virgo and other clusters to establish the expansion rate and the universe ' s age

    天文學家用哈勃觀測到仙女星座和其它星群中的造父變星（如圖） ，以確定宇宙的膨脹速度和宇宙的年齡。
  10. We have to use some other methods to measure the luminosity or equivalently the absolute magnitude of the cepheid variable. since we can readily measure the apparent magnitude of a cepheid variable, to measure the luminosity means measuring the distance. we use some distance measurement methods, for example, parallax, to determine the relation

    要弄清這個關系，我們要知道不同造父變星的光度和光變周期數據，量度光變周期當然不是問題，但要得知一顆恆星的光度，我們首先要得知它的距離，這時便須藉助好像視差法等其他量度天體距離的方法。
  11. Except those celestial objects of several hundred light years, astronomers rely primarily on cepheid variables for measuring distances of celestial objects. using ground telescopes to gauge cepheid variables enable us to directly measure celestial objects within 20 to 30 millions light years. for more distant stars, other methods have to be used

    除了幾百光年內的星體外，天文學家很主要倚靠測量造父變星來計算天體的距離，利用地面望遠鏡測量造父變星，可直接給出約二三千萬光年內星體的距離，而對于更遙遠的星體，天文學家便要藉助其他方法，但這些方法還是需要利用造父變星來作校正。
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