What Causes The Apparent Retrograde Motion Of The Planets

From any point on the daytime surface of mercury when the planet is near perihelion closest approach to the sun the sun undergoes apparent retrograde motion.

As earth passes another planet the other planet. The planets that are closer to the sun than us venus and mercury spend about half their time moving east across the sky day by day which is called direct motion and half their time moving west. Usually planets travel from. When hearth catches up to anstarts to pass another planet the other planet seems to go retrograde.

This occurs because from approximately four earth days before perihelion until approximately four earth days after it mercury s angular orbital speed exceeds its angular rotational velocity. Astronomers use the term to refer to the occasional backwards motion of the planets as seen in earth s sky. As earth passes another planet the other planet appears to move backward with respect to the background stars but the planet s motion does not really change. See full answer below.

Apparent retrograde motion is an illusion created by turbulence in earth s atmosphere. How long the planet goes retrograde depends on both earth s speed. It happens around the date of opposition when the planet is opposite the sun in the sky. Retrograde motion happens when the earth overtakes an outer planet in its orbit.

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View this answer the planets do not actually move west across our sky. When used in this way retrograde motion is entirely an illusion caused by the moving. Apparent retrograde motion is an illusion created by turbulence in earth s atmosphere. You are on earth or in one car.

Retrograde action of planets is brought about by potential of the data that the two the earth and the different planet are orbiting the sunlight and that orbits are elliptical no longer around.