Just a question: Which way do the planets rotate( Clockwise or Counter Clockwise), and do ring planets rotate the same?
The rotation of large bodies like planets is determined by the direction of rotation of the original gas cloud from which the system formed, so most planets, moons and other objects will orbit the sun and rotate in the same direction as the sun. Objects that rotate differently can be as a result of a number of events, collisions between objects can affect direction of rotation, it can also flip planets on end, for instance the earth is tilted 23.5 degrees, possibly caused by the collision that formed our moon. Uranus is titled by 98%, so essentially it's axis of rotation is pointed almost directly at the sun. It's possible that venus's direction of rotation was caused by an event that flipped the planet by 180% in the direction of it's orbit, hence it would appear to be spinning opposite the rest of the solar system, but it's actually spinning with it's original spin, but flipped over.
Other causes of odd spins and orbits could be because objects actually originated outside the solar system and retain the spin direction of their original system and an orbit that depends on the capture dynamics at time of arrival. Keep in mind that the galaxy is also spinning and all stars derive their spin from that original condensing gas cloud that formed the galaxy, so the majority of stars and planets should have similar rotation directions, but there has been plenty of time and events that would change this for a lot of systems so there is sure to be a lot of variety out there.