I hope this is an artifact!
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by
keith_edkins
Because I don't think even a hyper-advanced civilisation could draw a right-angled triangle that big ...
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by
bobbenjamin
scientist
Definitely an artifact... In very bright regions, the whole frame will get overexposed. It's very hard to smooth out the light levels on the frame boundaries in that case. Remember these images are millions of individual snapshots.
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