Smooth galaxies vs single stars
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by
clewarne
How do we know whether to classify something like this as a smooth galaxy or single star? I've been classifying them as smooth galaxies, reserving the star classification for something more distinct and less blurry/diffuse.
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by
Budgieye
moderator
All these images are of galaxies. Sometimes there is an overlapping star in our own galaxy in front, but just ignore the star and classify the galaxy behind. You are correct that stars have sharper edges, and galaxies are fuzzier.
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Budgieye
moderator
I think I see an X shape in this galaxy. Or maybe a Y shape.
more info here
2.2 Nucleus, nuclear bulge, and bulgeless, X-shaped bulges , nuclear rings https://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=2
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