Einstein ring

A dark star field with several small galaxies features a yellowish galaxy in the center. Surrounding this galaxy is a blue nearly circular horseshoe shaped object. Please see the explanation for more detailed information.
一片暗色星场中散布着几个小型星系，中心是一个淡黄色的星系。围绕着这个星系的是一个近乎圆形的蓝色马蹄形天体。有关更多详细信息，请参阅说明。

A dark sky shows bright comet with its tails extending diagonally from the lower left. Two tails are visible for the comet — a long blue tail and a shorter wider white tail. Oddly, a wiggly tan stream appears to be a third tail — but is actually the dust from a dissipated meteor. Please see the explanation for more detailed information.
昏暗的天空中，一颗明亮的彗星的彗尾从左下方斜向延伸。这颗彗星有两条彗尾——一条长长的蓝色彗尾和一条较短较宽的白色彗尾。奇怪的是，一条蜿蜒的棕褐色流线看起来像是第三条彗尾——但实际上是一颗消散的流星的尘埃。有关更多详细信息，请参阅说明。