金色的日冕食

探索宇宙（Universe）！每天都会展示一张关于我们迷人宇宙的不同图像或照片，并附上一段由专业天文学家（astronomer）撰写的简短说明。

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

说明：这次日全食（total solar eclipse）不仅具有诗意般的美感，在科学上也十分有趣。通常情况下，日冕（solar corona）呈现白色，对于一些观测者来说，上周日全食的日冕确实呈现出这种珍珠般的颜色。但这一次，在西班牙的日全食观测者看到的日冕呈现出不同寻常的金色。原因之一是，从西班牙观测时，全食发生时太阳正处于地平线附近。低空的阳光穿过了大量空气，这些空气散射了蓝光。附近森林火灾产生的异常浓烟充当了第二层滤光片，进一步散射了剩余的蓝色调，加深了原本就以金色为主的光线。这张经过高动态范围（HDR）处理的多重曝光图像是上周在西班牙贝纳文特拍摄的。唯一没有呈现金色的部分是悬浮在太阳左边缘上方、由氢气发光的日珥——它原本明亮的粉红色得以保留。

Explanation: This total solar eclipse appeared not only poetically beautiful but scientifically interesting. Usually the solar corona appears white, and to some observers the corona of last week's total solar eclipse did appear this pearly color. But this time, totality observers in Spain saw a corona that appeared unusually golden. For one reason, from Spain, the totality occurred when the setting Sun was near the horizon. That low, sunlight travels through a large amount of air which scatters out blue light. An unusual amount of smoke in the air from nearby forest fires acted as a second filter, further scattering the remaining blue tones and deepening the already gold-dominated light. The HDR-processed, multiple-exposure featured image was captured from Benavente, Spain last week. One thing that did not appear golden was a hydrogen-glowing prominence that hovered over the Sun's left edge -- its original bright pink color survived.