中国上空的虹彩幞状云
2022年9月6日 An Iridescent Pileus Cloud over China Image Credit & Copyright: Jiaqi Sun （孙嘉琪） Explanation: Yes, but how many dark clouds have a multicolored lining? Pictured, behind this darker cloud, is a pileus iridescent cloud, a group of water droplets that have a uniformly similar size and so together diffract different colors of sunlight by different ...