Retrograde Orbit Meaning
Retrograde Orbit Meaning. The planets venus and uranus spin clockwise, which is considered retrograde motion. $90^\circ < i < 180^\circ$ (moving eastward at ascending node) prograde orbits are the most fuel efficient because launching eastward leverages the motion of earth's rotation (for this.
The apparent retrograde motion of planets (and other objects) on the sky is an illusion caused by the fact that objects in our solar system orbit the sun at different. Retrograde motion, in astronomy, actual or apparent motion of a body in a direction opposite to that of the (direct) motions of most members of the solar system or of other astronomical systems with a preferred direction of motion.
