green mark
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by Heloh
What can be this green mark ? #newbie
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by ElisabethB moderator
The green mark is an artifact. Nothing special, sorry.
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best to put them down as optical anomalies as they are pixels
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by KWillett scientist, admin, translator
Yep - although in this case, since the image of the galaxy is mostly quite clear, we usually ask users to ignore the artifact (if possible) and classify the rest of the galaxy as they normally would. It's most useful to us if your clicks deal with the galaxy, and then it can be tagged here in Talk (for example) as #imageartifact or something like that.
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