@chilehead9 I think the arrow movement is geared to the speed of rotation. Venus and Mercury have very long rotation periods. the arrows do move but you have to watch the animation for a while to see the movement for those two.
the problem with those spin arrows is they are like necker cubes - you can see them as going either way.
but the video movement solves that problem
@Lukian half of it is me being picky due to my art and UX background. I didn't even notice the first time that it was a video. Watching it move, I can make the arrows go in either direction. Though the arrows for Mercury and Venus don't move.
@chilehead9 they rotate very slowly.