Retrograde Law of Constellation Planets _ Diagram of Retrograde Law of Constellation Planets

The inner planets Venus and Mercury revolve around the Earth faster than the Earth, that is, the revolution time is shorter than the Earth. Under normal circumstances, the earth runs slower than the inner planets, but the planets orbit the sun not in a perfect circle, but in an ellipse, and the orbits of each planet are different. Therefore, for a period of time, when the earth runs faster than the inner planet, it will go backwards. The same is true for extraterrestrial planets. Usually, the earth runs very fast, and when it runs slower than other planets, it will also go backwards.

So from the earth, any planet has retrograde, backward and forward movements.