幻日[Sundog] - 达人(其实～我是卧底，来自外星)

2004/10/24 | 幻日[Sundog]
类别(¤〖天文〗) | 评论(0) | 阅读(38) | 发表于 17:19: Also called mock suns or parhelia, sundogs are bright, colorful light patches which appear in ice clouds 22° or more to either side of the Sun.At sunrise and sunset,the angular separation from the Sun is exactly 22°.When the Sun is high, the sundogs may appear diamond-shaped, and no sundogs can occur if the Sun is higher than 61°. In addition, a bluish streamer is sometimes seen extending from them in the direction Sun.; 0