Color inversion shows very dark central zone with a dark ring around the outer galaxy. Appears very near similar galaxy.
Well, looks like a big foreground star. The color is weird. I've read there are in thuth no green stars coz of other wavelengths emitted..
by ElisabethB moderator
Correct. A star with lots of imaging problems. 😄
More weird images here : http://tinyurl.com/GZartifacts