Revolution of the Earth: The second important moment of the Earth is to travel around the Sun in its fixed annual orbit from the west to the east. Earth’s orbit is approximately 965 million km long, which is completed at a speed of approximately 29.6 km per second in 365 days. The orbit of the Earth is not circular but is elliptical, which keeps 4 changing the distance between the Sun and the Earth during the revolution. The average distance between Earth and Sun is 150 million km.
When the earth is at the highest distance (152 million km) from the sun, it is called ‘aphelion’ and when it is at the nearest distance (147 million km) it is called perihelion. In the event of the aphelion, the journey of earth is relatively quick. On the contrary, in the case of ‘Perihelion’ it takes more time to travel.
This keeps the solar-day period decreasing and increasing. Different seasons are made possible due to the revolution of the earth. As a result of the change in both the motion and position of the Earth, the distribution of solar energy on the earth is.
