On March 13, 2017 0:18 minutes, beijing in the sky appear tremendous lunar halo. After lasting nearly 15 minutes, disappear. Belt of a cloud is traversed during among them, weiwei is grand. (all pictures all are achieved formerly for fair number Icityface, prohibit reprinting)Lunar halo, it is smooth when passing through headroom cirrostratus, suffer ice crystal to refract action, make 7 kinds of compound light are dispersed to be inside infra-red violet aureola or smooth arc, around it is all round the moon generation aperture. Dizzy can divide to have " small dizzy " and " big dizzy " , "Small dizzy " namely 22 degrees dizzy, "Big dizzy " namely 46 degrees dizzy. Small dizzy be it is the centre of a circle with illuminant, horny radius is shown for a kind of 22 degrees inner ring damask, outer lane now and then the aureola that is purple or white, the sky inside halo is apparent relatively outside halo dark. And big dizzy it is the dizzy annulus that horny radius is 46 degrees, very scarce, compare commonly small dizzy dark. These ' dizzy ' it is cirrostratus actually, when we attend scientific class also respecting, cold air encounters warm moist air, form the cloud that should rain. At this moment, the sky is very cold, water froze hexagonal ice crystal, when the lunar illumination in the evening shoots these ice crystal, formed lunar halo. Lunar halo has big group, if pursue. Also have circlet, appear on lunar edge only. The moon is left next horn that the brightest tiny spot is Jupiter. Grace to lunar halo many. (all pictures all are achieved formerly for fair number Icityface, prohibit reprinting)