Rotation that is opposite to the common rotation of most objects in the solar system. Most of the planets rotate counter-clockwise, while Venus and Uranus rotate in a retrograde motion - clockwise.
Retrograde motion is in the direction opposite to the movement of something else, and is the contrary of direct or prograde motion. The term is often used when discussing the APARENT motion of the...
It is the apparent backward movement of a body, overtaking a car that you are passing on the highway, it appears that the other car is moving backwards (relative to you).
In Astronomy this is most...