The brightness of stars (point sources) is only a function of telescope aperture-the larger the aperture, the brighter the images.

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。

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The measurements are about 10 times better than previous observations, largely because of telescope enhancements that compensate for distortions in Earth's atmosphere, Gebhardt added.

这次获得的结果大约是以前观察的10倍，而Gebhardt 表示其原因主要是由于望远镜精度的提高补偿了地球大气层对光线的扭曲。

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The telescope has a magnification of 50.

这个望远镜可以放大50倍。

《牛津词典》

Newton's reflecting telescope produced much clearer pictures than the old kind of telescope.

VOA: special.2011.06.01

So with his optic glass, his telescope, Galileo was able to discern spots on the orb of the moon.

因此通过他的磁光玻璃，望远镜，伽利略能够分辨出月亮轨道上的斑点。

耶鲁公开课 - 弥尔顿课程节选

Galileo's only using, of course, his telescope in the first place because his human capacity for vision is insufficient to see the truths of the heavens.

他唯一一次用到望远镜,是因为仅凭人类的视力,并不能够看到天堂的真理所在。

耶鲁公开课 - 弥尔顿课程节选

No one in Pakistan had ever built this kind of telescope before, according to the Tribune story.

FORBES: Pakistani Recreates Newton's Telescope

Using almost every type of telescope known to humankind, Prof Marscher believes he has worked out where and how the jets - or blazars - are formed.

BBC: Black holes reveal more secrets

This week saw the first results of a project, costing that tidy sum, which will allow astronomers to examine the universe to their hearts' content, regardless of telescope administrators and cloudy skies.

ECONOMIST: The Sloan star survey