A circular band of colored light around a light source,as around the sun or moon,caused by the refraction and reflection of light by ice particles suspended in the intervening atmosphere.

• 晕环绕着诸如太阳或月亮等发光体的一圈有色光晕，通常是由于散布在大气层中的冰物质使光线发生反射或折射而引起的