Rotation is when something goes round an external axis, revolution is when something rotates about an internal axis (think of a revolver), retrograde motion comes about because all the planets rotate around the Sun and sometimes when we overtake an outer planet it appears to go backwards along the ecliptic for a while, like another car when you overtake it.
Prograde. In our solar system, prograde is counterclockwise rotation or revolution. Retrograde is clockwise rotation or revolution.Clockwise and counterclockwise are "as viewed from above the Earth's north pole".All solar system planets have a prograde rotation except Venus and Uranus which have retrograde rotation.All the planets have prograde orbital motion (revolution) around the Sun.So, Mercury has prograde motion in both cases.
Venus and Uranus have retrograde rotation.There are other meanings of retrograde motion, but retrograde rotation fits the question best.
retrograde motion
Venus has no natural satellites and retrograde motion (orbits opposite direction it rotates).
Uranus and Venus are the two planets in our solar system that have a retrograde rotation. All of the planets orbit the Sun.
Prograde. In our solar system, prograde is counterclockwise rotation or revolution. Retrograde is clockwise rotation or revolution.Clockwise and counterclockwise are "as viewed from above the Earth's north pole".All solar system planets have a prograde rotation except Venus and Uranus which have retrograde rotation.All the planets have prograde orbital motion (revolution) around the Sun.So, Mercury has prograde motion in both cases.
Venus and Uranus have retrograde rotation.There are other meanings of retrograde motion, but retrograde rotation fits the question best.
They call that retrograde motion
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. [See related link]If you were on a child's roundabout and your friend was running alongside in the same direction you were spinning, that would be prograde. If however, your friend turned around and ran the opposite way, that would be retrograde motion. [See related link for a pictorial]In astronomy:The Earth and four other planets rotate in the same direction as the Sun does; Prograde.Venus and Uranus rotate in the opposite direction; retrograde.Do not confuse this with retrograde revolution, as no planet revolves in the opposite direction to the Sun.See related link for a full explanation.
retrograde motion
Retrograde motion is motion in the opposite direction. In the case of celestial bodies, such motion may be real, defined by the inherent rotation or orbit of the body, or apparent, as seen in the skies from Earth.
Venus has no natural satellites and retrograde motion (orbits opposite direction it rotates).
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. [See related link]If you were on a child's roundabout and your friend was running alongside in the same direction you were spinning, that would be prograde. If however, your friend turned around and ran the opposite way, that would be retrograde motion. [See related link for a pictorial]In astronomy:The Earth and four other planets rotate in the same direction as the Sun does; Prograde.Venus and Uranus rotate in the opposite direction; retrograde.Do not confuse this with retrograde revolution, as no planet revolves in the opposite direction to the Sun.See related link for a full explanation.
Retrograde motion happens when the Earth overtakes an outer planet in its orbit. It happens around the date of Opposition when the planet is opposite the Sun in the sky. Usually planets travel from west to east along the ecliptic, but during retrograde motion they travel backwards, from east to west,.
Uranus and Venus are the two planets in our solar system that have a retrograde rotation. All of the planets orbit the Sun.
Rotation or revolution which motion of earth brings morning and which brings summer?
Pluto, like most bodies in the solar system, has a prograde orbit (inclination: ~17° from the ecliptic).Its rotation is retrograde, though (inclined at ~120°).