• The Earth’s spinning on its axis reasons day and night. EARTH MOVEMENT
  • The Earth’s revolution (in its orbit around the Sun) causes a change in seasons.
  • When nights and days are equal is recognized as ‘Equinoxes.’ During the equinox’s time, the Sun shines accurately over the equator.
  • 21 March (of each year) is recognized because the vernal (spring) equinox and  23  September (of each year) is recognized as the autumnal equinox. EARTH MOVEMENT

Facts About the Earth


  • When the distinction between the length of day and night is most recognized as ‘Solstice.’
  • During the solstice time, the Sun shines over the tropics (either on the Tropic of Cancer or Tropic Capricorn).
  • 23.50 North represents ‘Tropic of Cancer.’ On June 21, the Sun shines over the Tropic of Cancer and it is known as the longest day of the year.
  • 21 June is recognized as the Summer Solstice.

Structure of The Atmosphere


summer solstice June 21

  • 23.50 South represents ‘Tropic of Capricorn.’ On December 21, the Sun shines over the Tropic of Capricorn and it is known as the longest night of the year.
  • 21 December is recognized as Winter Solstice.

winter solstice december 21

  • When the light of a celestial body is obscured by another celestial body, the situation is known as ‘Eclipse.’
  • When the Earth arises between the Sun and the Moon, it is recognized as a “Lunar Eclipse.”

Lunar Eclipse

  • When the Moon comes between the Sun and the Earth, it is known as a “Solar Eclipse.”

Solar Eclipse

Heads, Capitals, Population, Areas, and Currencies of World Countries-States

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