Uranus looms well over 2.5 light-hours away from Earth tonight. In contrast, the moon - our nearest celestial neighbor - resides only 1.3 light-seconds away.

今晚天王星距离地球超过2.5光小时远。相对的，月球——我们最近的邻近天体——距离地球只有1.3光秒远。

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A third group are known as crepuscular: they thrive in the low light of dawn and dusk and remain inactive at other hours.

第三组被称为黄昏组：他们在黎明和黄昏的微光中茁壮成长，而在其他时间则不活跃。

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Twenty-four hours of light bleaches out the structure of a day, so ship life becomes organized by meals and debarkations, either onto land or into the inflatable dinghies.

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This technology also increases the light-source lifetime to 20, 000 hours in ExtremeECO mode and enables as much as 90% power savings, helping to reduce TCO over its life, thus positioning the K750 as one of the most environmental friendly projectors.

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Next time we will be more prepared -- with Federal funding, I could light up the whole of Southern Mississippi within 24 hours using a high-speed Internet connection.

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