The galaxy is visible to the naked eye on moonless nights as a smudge of light and is the most distant object visible without a telescope.

该星系在无月夜的夜晚可由肉眼观测到一个小光斑，它也是不借助望远镜能被肉眼观测的最远天体。

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During the nights, not only were the concentrations of ozone, nitrogen oxides and other gases measured by this plane, but also, almost as an afterthought, the intensity of the light from below.

在夜晚，这架飞机不但检测臭氧、氮氧化物和其他气体的浓度，还测量了飞机下的光照强度，而这项测量差不多是后追加上的项目。

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Originally desending from the far north of Norway, he grew up with light nights in the summertime, and dark day in the winter.

他来自挪威北端，成长于夏日的极昼和冬季的极夜。

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That show aired four nights a week and burned out a the speed of light.

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There are many memories for me in this building, from nights in the BBC Club - including one where I ended up helping Frankie Howerd back to the head of light entertainment's office - through to photo shoots, and all the colleagues I have worked with.

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In the Bolivian Andes, ice-blue glaciers crown amphitheatres of peaks, llamas graze quietly in the afternoon sun and the evening light fades into frigid mountain nights.

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