Relative rotation periods of planets in 2D.

Credit: @Physicsj

@wonderofscience @Physicsj it’s actually amazing how, excluding the tidally locked planets, the planets have huge differences in size, formation, and composition but all have rotation periods within a factor of ~2.
@wonderofscience @Physicsj (I know Mercury isn’t tidally locked, 3:2 resonance with Earth etc, but it’s still close enough to the sun to exclude from the generalization)