Revolution Of The Earth – General Science Notes – For W.B.C.S. Examination.
Revolution is often used as a synonym for rotation. However, in many fields like astronomy and its related subjects, revolution is referred to as an orbital revolution. It is used when one body moves around another while rotation is used to mean the movement around the axis. For example, Moon revolves around the Earth, and the Earth revolves around the Sun.Continue Reading Revolution Of The Earth – General Science Notes – For W.B.C.S. Examination.
The movement of the Earth around the Sun in a fixed path is called a revolution. The Earth revolves from west to east i.e, in the anticlockwise direction. The Earth completes one revolution around the Sun in one year or precisely in 365.242 days.
Rotation and Revolution of Planets
Planets | Mean distance from the Sun in millions of kilometers | Period of Revolution | Period of Rotation |
Mercury | 57.9 | 88 days | 59 days |
Venus | 108.2 | 224.7 days | 243 days |
Earth | 149.6 | 365.2 days | 23 hr, 56 min, 4 sec |
Mars | 227.9 | 687 days | 24 hr, 37 min |
Jupiter | 778.3 | 11.86 years | 9 hr, 55 min, 30 sec |
Saturn | 1,427 | 29.46 years | 10 hr, 40 min, 24 sec |
Uranus | 2,870 | 84 years | 16.8 hours |
Neptune | 4,497 | 165 years | 16 hr, 11 min |
Difference Between Rotation and Revolution
The table given below provides the basic differences between the rotation and revolution.
Rotation | Revolution |
Rotation of the Earth is its turning on its axis. | Revolution is the movement of the Earth around the Sun. |
The Earth takes 24 hours to complete a rotation around the Sun. | The Earth takes a full year (365 days) for one complete revolution around the Sun |
The Earth’s axis of rotation is tilted by 23.5 degrees. This tilt causes the different seasons of the year. | The path of the Earth moving around the Sun is called an orbit. The Earth’s orbit is elliptical. |
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