Robert sent in the link, https://phys.org/news/2019-09-saturn-impossible-rotation.html … it seems Saturn may be prone to a bit of electromagnetic shimming and twisting which has thrown attempts to determine how long it takes to rotate on its axis. Robert theorises that it is due to different levels of energy input into each hemisphere. The northern hemisphere with its hexagon and the southern hemsiphere with its cyclone may indicate differing strengths of a Birkeland Current. Saturn's magnetic field polarity is opposite to that of the earth. It may well be that the hemispheric rotation of both Jupiter and Saturn is being driven in opposite directions – hence the shimmy.
Robert also sent in a message to the contact email address to say Eric Lerner has produced 5 videos on the 'discovery' of a 'black hole' at the centre of M87. See www.youtube.com/user/LPPfusion/videos