The planet Venus takes 224.7 Earth days to complete a single orbit of the sun. Venus is unique in that it rotates along its axis in the opposite direction of the other planets.

According to the NOAA, the revolution of Venus is approximately 225 Earth days. Interestingly, the time of revolution of Venus is less than its time of a single planetary rotation, which takes 243 Earth days.

Neptune has the longest period of revolution around the sun at 165 Earth years. In contrast, Earth's period of revolution is 365.2 days, the time measured as one year.


The planet Mars completes its orbit of the sun in just under 687 Earth days. Mars orbits the sun much further away than Earth, and its longer year results from having to travel a greater distance.

The planet Mars completes one orbit of the sun every 687 Earth days. Because Mars is farther from the sun, its revolution period is slower than that of the Earth.

Mercury is the planet with the shortest period of revolution of approximately 88 Earth days. However, Mercury’s period of rotation is about 59 Earth days.

Venus, the second planet from the sun, is slightly smaller than the Earth and is covered by thick clouds of sulphuric acid that make it difficult to observe its surface. Venus appears as a bright object in the morning sk...