由于生物体本身的习性就是在晚上睡觉，很多曾经上过夜班的人称：不论他们曾经作过多长时间的夜间工作，现在他们总是很难保持清醒。
With biology beckoning their bodies to sleep during the night, shift workers say they struggle to stay awake no matter how many years they've done it.
所要做是看它重新出现在另一边花多长时间，这样就可以计算这个模糊物体的大小。
All you have to do then is time how long it takes the star to reappear on the other side and you can calculate the size of the obscuring object.
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