Revolution and Rotation of Earth

By | March 3, 2015

Revolution of Earth:

  • Revolution of Earth’s motion is in elliptical orbit around the Sun.
  • Earth takes 365 days, 5 hours. 48 minutes and 45.51 seconds to complete one revolution. It leads to one extra day in every 4 years.
  • The revolution of earth result in
    1. Changes of season
    2. Variation of duration of day and nights at different times of the year.
    3. Shifting of the wind belts.

Rotation of Earth:

  • The Earth rotates on its own imaginary axis from West to East in 23 hours, 56 minutes and 40.91 seconds.
  • The rotational speed at equator is maximum (1667 km/hr) and then decreases towards the poles, where it is zero. The days and the nights are equal at the equator.
  • The rotation of the Earth has the following implications such as
    1. Causation of day and night.
    2. Change in the direction of winds and ocean currents.
    3. Rise and fall of tides everyday.
    4. A difference of one hour between the two meridians, which are 15° apart.