I wonder...looking at the picture, do galaxies generally turn clockwise? Or counterclockwise? (Some look like disturbed wasp nest!)
A sort of slide.....Here is a link to article on Water and Coriolis force at:
https://www.livescience.com/33567-toilet-swirl-direction-equator.html
Snip....."Shapiro began his experiment by filling a large, shallow dish with water, making sure that the water entered the dish with a clockwise swirl, the opposite direction you'd expect it to turn in the Northern Hemisphere. He covered the dish with a plastic sheet, which removed any air drag, and let the water stand for 24 hours to negate its initial spin. When Shapiro first unplugged a drain at the bottom of the dish, he didn't notice any rotation to the water as it drained. However, after some time the water eventually began to swirl counterclockwise, though at a slow rate.
A few years later, another research team at the University of Sydney showed the opposite to be true in the Southern Hemisphere."
Anything like that on a galactic scale?
Let's do a thought experiment.
Imagine that you are looking at a galaxy 1 million light years away from earth and that it appears to be rotating clockwise.
Now imagine that there is an observer on a habitable planet in the same direction as that galaxy and 2 million light years away from earth.
From that distant observers vantage point, in which direction will the galaxy be rotating?