Does Venus rotate at a constant speed? Can you be specific?

Venus is actually a very strange planet. First of all, it rotates slowly. One rotation period on the earth is about 243 days. Second, its rotation speed is not constant, and the average amplitude of each solar day will change for about 2 minutes. For a long time, people have been unable to explain the change of Venus' rotation speed. However, people have noticed that the atmospheric wind speed of Venus is very fast. Balloons flying against the wind were released into the atmosphere of Venus. It can fly around Venus once every four Earth Days.

Recently, according to the photos of Venus taken by Japan's Dawn probe, scientists found that this change in rotation speed may be related to the interaction between strong winds on Venus and its surface mountains. In the latest photos of Venus taken by Dawn, scientists discovered some huge atmospheric structures. These structures are repeated and all appear in the same position. After research, scientists believe that these atmospheric structures are located directly below the mountains on the surface of Venus. They are actually high-speed moving terrain waves. Topographic wave, also known as mountain pulse wave, is an atmospheric gravity wave generated by the interaction between some topographic elements (such as mountains) and the wind passing above them.

We can't see the surface of Venus, mainly because Venus is covered with extremely thick permanent clouds. However, in some invisible bands, our detector can still penetrate thick clouds. The multi-band data of Dawn made scientists realize that the slight change of Venus' rotation speed may be caused by the conflict between the strong wind in Venus' atmosphere and the mountains on Venus' surface. Strong winds will have a net force on the mountains, which in turn will affect the overall rotation of Venus. This may be the reason why the rotation speed of Venus has changed.

The rotation direction of the planet means that the rotation direction of the sun is also from west to east. Because all the planets are thrown from the sun. The time for Venus to orbit the sun is 224.65 days of Earth time. However, Venus rotates in a different direction from other planets, from east to west. Venus rotates slowly. One rotation takes 243 days. In other words, Venus rotates once. Longer than the revolution. Therefore, if you watch the sunrise and sunset on Venus, it will rise in the west and slowly set in the east. It takes more than a year to complete the sunrise and sunset.