https://www.legacysurvey.org//viewer/?ra=136.4893&dec=5.0848&layer=ls-dr9&zoom=15
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This is just an image artifact. Bright stars, especially the nearby ones, are just too bright for the cameras used for imaging distant galaxies. You’ll notice that the legacy surveys exclude the disk of the milky way, that’s because there are just too many bright stars and nebulae
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