Here is my fast and dirty theory about one secret to outer planet transits.
But first let me define some terms:
inner planets (i.e. personal planets)—planets inside the Asteroid Belt
personal planets—Sun, Moon, Mercury, Venus, Mars I call them the worker bees. The Moon is the Queen Bee for she works her magic around the entire zodiac each month. Next is Mercury and Venus, who are never far from the Sun, fleshing out the sign he occupies each month. Mars is the renegade of the bunch, taking roughly 2 years to make his path around to each sign. Along with the Rising Sign, these guys are the building blocks of the personality—the nuts and bolts.