20210209 拍摄于俄勒冈州海岸拥抱点瀑布的幻月 必应壁纸

幻月 拍摄于俄勒冈州海岸拥抱点瀑布的幻月 当天空晴朗，月亮低挂在地平线上时，你有时会发现它周围有一个光环，就像这张照片中从俄勒冈州海岸的Hug Point Falls拍摄到的那样。有时在这个光环中，你也会看到一个亮点，看起来像是第二个月亮。不，这不是月球上失散已久的孪生行星，而是一种光学现象，被称为paraselene，通常被称为月亮狗或幻月。当真正的月亮至少有四分之一可见时，这种“假”月亮就会出现，并且亮度足以使其光线折射出漂浮在大气层中的六边形板状冰晶。幻月更常见于冬季，那时冰晶在冬季更为普遍云朵。太阳在月球上相当于幻月，也被称为太阳近日点，两者都是一种相关的光学现象，称为22度光晕。像这样的光晕也是由大气中的晶体折射引起的，以其22度的视半径命名，即在月球和太阳外约10倍的直径。一个22度的光环据说每年可以看到100次，比彩虹更常见。

原文:

When the sky is clear, and the moon hangs low in the horizon, you can sometimes spot a halo around it, like the one captured in this image from Hug Point Falls on the Oregon coast. And sometimes within that halo, you may also see a bright spot that appears to be a second moon. No, it's not the moon's long-lost twin, but an optical phenomenon called a paraselene, more commonly referred to as a moon dog or mock moon. This 'false' moon can appear when the real moon is at least a quarter visible and is bright enough for its light to refract off hexagonal-plate-shaped ice crystals floating in the atmosphere. Moon dogs are more commonly seen in winter months, when the ice crystals are more prevalent in the clouds.The moon dog is the lunar equivalent of a sun dog, also known as a parhelion, and both appear as part of a related optical phenomenon called a 22-degree halo. Halos like these are also caused by crystal refraction in the atmosphere, and named for their apparent radius of 22 degrees, or about 10 diameters outside the moon and sun. A 22-degree halo is said to be visible up to 100 times per year, much more common than a rainbow.

高清下载:

https://www.todaybing.com/download/hd?id=w8UYN6Rk

手机壁纸下载:

https://www.todaybing.com/download/mbhd?id=w8UYN6Rk     

4K+原图下载:

https://www.todaybing.com/detail/w8UYN6Rk.html

来源:

必应壁纸

注：官网壁纸投稿已开放。