Now we have basically seen how theeye works we can look at its use in studying the night sky.
现在,我们已经大致了解了眼睛能看到物体的原理。我们着眼于它的原理来研究下夜空视物。
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Inthe beginning of time, the skies were filled with flying elephants, Every night they lay down inthe same place inthesky, And dream with one eye open.
在最初的时光,天空中满是飞翔的大象,每一夜,他们降落在天空同一位置休憩,睁着一只眼睛坠入梦乡。
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This glittering metropolis of stars is easily found inthe winter skyinthe constellation Hercules and can even be glimpsed with the unaided eye under dark skies.