月亮的颜色
(原标题: Colors of the Moon)
2022-05-15
浏览次数: 15
月亮是什么颜色的？这要看晚上的情况。在地球大气层之外，由于反射的阳光而发光的暗月亮，呈现出一种华丽的棕灰色。然而，从地球大气层内部看，月球看起来完全不同。这张特色图片突出了一位天体摄影师在意大利不同地点拍摄的满月的明显颜色集合。红色或黄色的月亮通常表示接近地平线的月亮。在那里，一些蓝光在穿过地球大气层的漫漫长路中被散射掉了，有时还夹杂着细小的尘埃。蓝色的月亮更为罕见，可以表明月亮穿过大气层，携带较大的尘埃颗粒。是什么造成了紫色的月亮尚不清楚——它可能是几种影响的综合。最后一张照片拍摄的是2018年7月的月全食——由于光线通过地球周围的空气折射，月球在地球的阴影中呈现出微弱的红色。今天，北美和南美的观测者不仅可以看到另一个满月，还可以看到月全食——这种现象可能会导致一些意想不到的月球颜色。
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What color is the Moon? It depends on the night. Outside of the Earth's atmosphere, the dark Moon, which shines by reflected sunlight, appears a magnificently brown-tinged gray. Viewed from inside the Earth's atmosphere, though, the moon can appear quite different. The featured image highlights a collection of apparent colors of the full moon documented by one astrophotographer over 10 years from different locations across Italy. A red or yellow colored moon usually indicates a moon seen near the horizon. There, some of the blue light has been scattered away by a long path through the Earth's atmosphere, sometimes laden with fine dust. A blue-colored moon is more rare and can indicate a moon seen through an atmosphere carrying larger dust particles. What created the purple moon is unclear -- it may be a combination of several effects. The last image captures the total lunar eclipse of 2018 July -- where the moon, in Earth's shadow, appeared a faint red -- due to light refracted through air around the Earth. Today there is not only another full moon but a total lunar eclipse visible to observers in North and South America -- an occurrence that may lead to some unexpected lunar colorings.
© Marcella Giulia Pace