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Puzzling observation about Milky Way, deep space galaxies' rotations.
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this post was submitted on 24 Mar 2025
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Thanks! The article never mentions the direction of the MW's spin, so the bias section reads pretty roughly. If the reader knows that going in then it makes perfect sense:
MW spins counter-clockwise
Most observed galaxies spin clockwise
Doppler effect would make galaxies spinning the opposite direction of Milky Way appear slightly brighter to us,
which suggests observation bias as a possible explanation. I only got 2/3.
A strategic "also" in "This could explain why such galaxies seem more common in telescope observations." would have helped as well.