邻近星系核心周围的爱因斯坦环
A cluster of galaxies is shown with many galaxies around the cluster center. A close look at this center shows that it is encompassed by a narrow ring of light. Please see the explanation for more detailed information.
图中显示的是一团星系，许多星系围绕着星系团的中心。仔细观察星系中心，可以发现它被一圈狭窄的光环所包围。有关更多详细信息，请参阅说明。