星星(点光源)的亮度只是望远镜孔径的函数-孔径越大，图像越亮。
The brightness of stars (point sources) is only a function of telescope aperture-the larger the aperture, the brighter the images.
上图所示的这一亦称“h和chi英仙座”(“ h andchi Persei ”)的不同寻常的双星星群的亮度高到可以在一个暗处不用双筒望远镜就看到。
Also known as "h and chi Persei", this unusual double cluster, shown above, is bright enough to be seen from a dark location without even binoculars.
正如白昼时天空中没有任何一颗星星的温度和亮度能超过太阳，同样，也没有任何一项竞赛能够比奥运会更伟大。
As in the daytime there is no star in the sky warmer and brighter than the sun, likewise there is no competition greater than the Olympic Games.
这颗星星因为亮度变化比一般星星的变化间隔时间要长。周期持续整整2天零20个小时零49分钟。
This star is known to vary in brightness over a regular time interval. The cycle lasts exactly 2 days, 20 hours and 49 minutes.
这样以来，研究团队也发现了42个怪胎清扫和温度的蓝色恒星和恒星亮度的典型比普通胀年轻得多的星星。
In doing so, the SWEEPS team also uncovered 42 oddball blue stars with brightness and temperatures typical for stars much younger than ordinary bulge stars.
其中最为明亮的星星，金牛座的昴宿六，其亮度甚至是咱太阳的700 - 800倍。
The brightest Pleiades star, Alcyone, is some 700 to 800 times brighter than our sun.
火星将于黄昏时分升起，在午夜时高挂天空，这颗橘色火球的亮度比夏季天空中最明亮的星星还高出十五倍。
It will rise at sunset and loom high at midnight, an orange beacon 15 times as bright as the leading stars of summer.
因为猎户座是最与众不同的星座之一，它呈一大矩形形状，当中有三颗众成一列、中等亮度的星星。
That's because Orion is one of the sky's most distinctive constellations. It's a large rectangle, with a distinctive row of three medium-bright stars in the middle.
因为猎户座是最与众不同的星座之一，它呈一大矩形形状，当中有三颗众成一列、中等亮度的星星。
That's because Orion is one of the sky's most distinctive constellations. It's a large rectangle, with a distinctive row of three medium-bright stars in the middle.
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