A halo of different color
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by
olberry
Why is there a halo like that? Might it be a part of a galaxy that differs in mass or temperature? Or is it some sort of lensing effect due to gravity or something?
Posted
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by
Rick_N.
It;s a star in our galaxy that has photographic problems and should be classified as an artifact. There's no halo or lensing, just bad imaging. The bigger picture also shows a boundary edge. A common problem.
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237649769177350264Posted