Retrograde rotation means the direction of rotation is opposite to that of the sun.So clockwise rotation. In case of satellites, the reference object is their mother planet instead of the sun. All planets in the solar system except Venus and Uranus have prograde rotation. read more
Retrograde motion is the opposite of prograde motion. So, retrograde motion is where a body is moving in the direction opposite to the movement of something else. Not to be confused with apparent retrograde motion. read more
Prograde rotation means the direction of rotation is same as that of the sun(the central hub of our system) which is in the counter-clockwise direction when viewed from the north pole. Retrograde rotation means the direction of rotation is opposite to that of the sun.So clockwise rotation. read more
An object with an inclination of exactly 90 degrees has a perpendicular orbit that is neither prograde nor retrograde. An object with an inclination between 90 degrees and 180 degrees is in a retrograde orbit. Axial tilt. A celestial object's axial tilt indicates whether the object's rotation is prograde or retrograde. read more