aurora borealis over mountains within denali national park on a very cold winter night. the andromeda galaxy is visible to the left - 環狀星系 個照片及圖片檔阿拉斯加州, 北極光
Photograph of the Andromeda Galaxy taken on 29 December 1888 with an exposure of 4 hours. Dr Isaac Roberts, an amateur astronomer and pioneer...仙女座星系
messier 104 is commonly known as the sombrero galaxy because in visible light, it resembles the broad-brimmed mexican hat. however, in this infrared view taken by spitzer, the galaxy looks more like a bull's eye. - 環狀星系 個照片及圖片檔
the sombrero galaxy, also known as messier 104 or ngc 4594, is an unbarred spiral galaxy in the constellation virgo. it has a bright nucleus, an unusually large central bulge, and a prominent dust lane in its inclined disk. - 環狀星系 個照片及圖片檔