NASA·APOD每日天文一图2022.5.14 [超高清]

An almost full moon on April 15 brought these luminous apparitions to a northern spring night over Alberta Canada. On that night, bright moonlight refracted and reflected by hexagonal ice crystals in high clouds created a complex of halos and arcs more commonly seen by sunlight in daytime skies. While the colors of the arcs and moondogs or paraselenae were just visible to the unaided eye, a blend of exposures ranging from 30 seconds to 1/20 second was used to render this moonlit wide-angle skyscape. The Big Dipper at the top of the frame sits just above a smiling and rainbow-hued circumzenithal arc. With Arcturus left and Regulus toward the right the Moon is centered in its often spotted 22 degree halo. May 15 will also see the bright light of a Full Moon shining in Earth's night skies. Tomorrow's Full Moon will be dimmed for a while though, as it slides through Earth's shadow in a total lunar eclipse. 

4月15日，一轮近乎满月的月亮将这些发光的幽灵带到了加拿大阿尔伯塔省北部的一个春夜。那天晚上，明亮的月光被高空中的六角形冰晶折射和反射，形成了白天天空中更常见的光晕和弧形。虽然弧线和月亮狗或副天狼星的颜色只能用肉眼看到，但这幅月光下的广角天景使用了30秒到1/20秒不等的混合曝光。画面顶部的北斗七星位于一个微笑的彩虹色环绕天顶弧上方。大角星在左边，轩辕星在右边，月亮的中心是经常被发现的22度光环。5月15日还将看到明亮的满月之光在地球的夜空中闪耀。然而，明天的满月将在一段时间内变暗，因为它在月全食中穿过地球的阴影。