diptych? new term for me, I had to look up that word. thanks.
Both the above are examples of differential rotation. Layers of our sun also rotate differentially. But it is really quite complicated on how this works on either scale (galaxy or a large storm system on our tiny planet).
completely different where I live. a similar weekly scuffle that ended with a few teenage girls ripping their shirts off and screaming about being pregnant or something ... then minutes later 3 squad cars and a police SUV bring the entire street on lockdown. that put a rest to the weekly attacks on our street for past month or so.