| 1. | Cepheid variable is the foundation of this ladder
，而造父变星便是这阶梯中不可或缺的其中一环。 |
| 2. | 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。 |
| 3. | Double - mode cepheid
双模造父变星 |
| 4. | Well , you may ask : how can we determine the luminosity - period relation
但你可能会问：我们怎样得知造父变星的光变周期光度关系？ |
| 5. | This makes space telescope invaluable for identifying a rare class of pulsating stars , called cepheid variable stars embedded within m100 ' s spiral arms
这对于从m100的旋臂中分辨出暗藏的造父变星有着莫大价值。 |
| 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
哈勃太空望远镜的一个重点计划，就是要测量更多更远星系中的造父变星远达 |
| 7. | The hubble space telescope captured the light variation of o e of the cepheids inside the spiral galaxy m100 which is at a distance of 56 million light years away from earth
距离地球五千六百万光年的旋涡星系m100内，哈勃太空望远镜拍得当中一颗造父变星的光度变化 |
| 8. | 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
星的中国名称为造父一，由于它最早被发现的一种新变星类别，所以这类变星皆称为造父变星。 |
| 9. | Subsequently astronomers found more and more cepheids in different corners of the universe and discovered that there exists a simple relationship between their luminosities and light variation periods
其后的天文学家在宇宙不同角落陆续找到其他造父变星，并发现了它们光度跟光变周期间的简单关系。 |
| 10. | By making use of this relationship , astronomers can turn cepheids into celestial yardsticks of the universe , enabling us to easily map the position of galaxies within 100 million light - years
利用这个简单关系，天文学家使造父变星成了宇宙间的里程碑，让我们可轻易给那些动辄远达数千万光年的星系定位。 |
