An ice crystal halo around the waxing gibbous Moon set in the winter stars of a January night. The 22¢X halo is most obvious and with a reddish and sharply defined inner rim and a bluish and more diffuse outer edge. But a faint 8¢X halo is also visible, a rare halo sometimes called the Van Buijsen Halo (according to Lynch and Livingston in their book Color and Light in Nature; Minnaert also mentions it in his seminal book The Nature of Color and Light in the Open Air). It is not a lens flare as shots taken with the Moon well off to one side of the frame still show the inner halo centred on the Moon. Nor is it an artifact of the exposure blending as it is present on the raw single long-exposure image.

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TOP29746314

Source:

達志影像

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RM

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須由TPG 完整授權

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