within the feedback for the Sunset Chart, arthyr makes this distinction about Saturn, which is from the ancient's precepts, and worthy of remembering, IMO:
Part 2 of the "Sunset Chart" (with background of a SunsetCt)
Saturn is the outermost planet we can see with the naked eye.
As such it's basic premise becomes associated with "limit." With this in mind, we would symbolize any limitation with Saturn as it makes it's way through the zodiac. Also Saturn is the slowest planet as it takes longer to complete its synodic cycle of 29.5 years than any other visible planet.