pbr An astronomical phenomenon that appears to show three suns appears above Changchun, the capital city of Jilin Province in northeast China.br ppbr Two smaller suns appeared on either side of the sun, with a strong light on top.br ppbr The smaller twins were about one-tenth of the size of the sun.br ppbr Together with the bright light, they formed a round, rainbow-like aura around the sun.br ppbr Experts said that such a phenomenon is called "phantom sun", which is an optical refraction in the atmosphere.br ppbr In winter, the clouds are formed by ice crystals and they are relatively higher in the sky than in summer.br ppbr When they happen to form a particular shape, they can reflect the sunshine in such a way that produces the astronomical phenomenon of "triple suns".