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.?

月亮是什么顏色的？這取決于夜晚。在地球大氣層之外，被反射的陽光照射的暗月亮呈現(xiàn)出一種富麗堂皇的棕灰色。然而，從地球大氣層內(nèi)部看，月球可能看起來完全不同。這張?zhí)厣珗D片突出顯示了一位天文攝影師10年來從意大利各地記錄的滿月的一系列明顯顏色。紅色或黃色的月亮通常表示在地平線附近看到的月亮。在那里，一些藍光在地球大氣層中被一條很長的路徑散射掉，有時還夾雜著細塵。藍色的月亮更為罕見，它可以表示在大氣層中看到的帶有較大塵埃顆粒的月亮。紫月亮的形成原因尚不清楚——它可能是多種效應的組合。最后一張照片拍攝的是2018年7月的月全食——由于光線通過地球周圍的空氣折射，月球在地球的陰影中呈現(xiàn)出微弱的紅色。今天，北美和南美的觀測者不僅可以看到另一輪滿月，還可以看到一次月全食——這種情況可能會導致一些意想不到的月球顏色。