It took me a while to understand your second para. I found a lot more on the broader topic here. https://en.wikipedia.org/wiki/Mach%27s_principle https://en.w

It took me a while to understand your second para. I found a lot more on the broader topic here. https://en.wikipedia.org/wiki/Mach%27s_principle https://en.wikipedia.org/wiki/Mach%27s_principle It mentions that rotational motion does seem to have an absolute reference frame.