寻找月亮
(原标题: Find the Moon)
2021-07-11
浏览次数: 35
月亮在哪里？在这幅图的某个地方，地球的月球隐藏了起来。整个月亮都是可见的，在它完全完全的阶段，在视线中。即使是摄影师敏锐的眼睛也找不到它，尽管他知道该往哪里看——只有相机的长时间曝光才能勉强找到它。虽然现在你可能会庆幸自己找到了它，但为什么发现它这么困难呢？原因之一是，这张照片是在月全食期间拍摄的，当时地球的阴影使月球比正常的满月暗淡得多。另一方面，这张照片拍摄于美国科罗拉多州，拍摄于日出之前。由于月球位于天空与太阳的正对面，这意味着太阳刚好在地平线以下，但仍然轻微地照亮了天空。最后，由于月球仅在地平线以上2度左右，相机和地平线之间的大量空气将大量光线从月球背景中散射出去。这张照片拍摄于2012年，12分钟后，太阳露出地平线，月亮落下。
查看原文解释
Where's the Moon? Somewhere in this image, the Earth's Moon is hiding. The entire Moon is visible, in its completely full phase, in plain sight. Even the photographer's keen eye couldn't find it even though he knew exactly where to look -- only the long exposure of his camera picked it up -- barely. Although by now you might be congratulating yourself on finding it, why was it so difficult to see? For one reason, this photograph was taken during a total lunar eclipse, when the Earth's shadow made the Moon much dimmer than a normal full Moon. For another, the image, taken in Colorado, USA, was captured just before sunrise. With the Moon on the exact opposite side of the sky from the Sun, this meant that the Sun was just below the horizon, but still slightly illuminating the sky. Last, as the Moon was only about two degrees above the horizon, the large volume of air between the camera and the horizon scattered a lot of light away from the background Moon. Twelve minutes after this image was acquired in 2012, the Sun peeked over the horizon and the Moon set.
© Jimmy Westlake (Colorado Mountain College)