A vector is a mathematical construct that has magnitude and direction. The cross product of two vectors is a binary operation in three-dimensional space that results in a third vector that is ...
In the present situation, both Earth and Mars are moving in the same direction around the Sun, but the slower one, Mars, appears to move backwards compared to the faster one, Earth. Just an illusion. The retrograde motion of Mars â like the apparent motion of the slower car on the highway â is nothing more than an illusion.
Rating Newest Oldest. Best Answer: Venus has a slow retrograde (backward) rotation. Uranus also has a retrograde rotation. It is also on it's back. HOWEVER You may be getting rotation confused with revolution. Rotation is a planet's spin on it's axis and revolution is it's motion around a star. All planets revolve around the Sun in a prograde (forward) motion. The vast majority of moons also revolve around their planets in a prograde motion. A notable exception is Neptune's moon, Triton.