The Ring Nebula, M57


The Ring Nebula (Messier 57, NGC 6720) in Lyra, seen in a three-color reconstruction from BVR CCD frames taken with the 1.1-meter Hall telescope at Lowell Observatory. The red frame emphasizes H-alpha and [N II] emission; multiple emission lines contribute to both B and V passbands. The blue color of the hot central star is apparent. The three monochrome images and their combination to make a color version are shown here.



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