星系环

A spiral galaxy is shown that seems to have rings in place of spiral arms. The outer ring is blue and filled with stars, while the inner ring is more red. The center has a vertical bar. Please see the explanation for more detailed information.
图中显示的是一个螺旋星系，它的旋臂似乎被环状结构所取代。外环呈蓝色，布满恒星，而内环则偏红。星系中心有一条垂直的棒状结构。有关更多详细信息，请参阅说明。