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The raw data for this image is available in Dropbox (Messier 51) for those of you with access. As always, let me know if you have any questions!

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Anonymous

It looks to me like the second galaxy is fuzzier and thus might be at a different distance. Are you sure the two are close to each other?

ajamesmccarthy

Yes! The fuzziness is from the immense gravity of the other galaxy causing tidal forces that smear the structures within it.