Messier 57, the Ring Nebula
M57 is the famous "Ring Nebula", in the constellation Lyra. It is a planetary nebula. The star visible at its center is a white dwarf, an incredibly hot and dense star.
• Date: September 28, 2002
The original negatives of this image had many scratches and other marks. I used the "min" combine function in RegiStar to remove these blemishes. Since the scratches were lighter than the sky background, the min function chose the darker sky pixels over the scratch pixels. To see what the image looks like using the "average" combine function, click here.
Click the image for a larger image (may take some time to load)
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