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→Formation of Seasons
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The Earth and all other celestial bodies in the Solar System are constantly moving. Rotation, precession and revolution of Earth are directly responsible for seasonal variations in a year. The term ‘Earth Rotation’ refers to the spinning of our planet on its axis, with an equatorial speed of 1040 miles per hour (about 465 meter per second or slightly over 1675 km per hour). One rotation takes twenty-four hours (23.93 hour) and is called a mean solar day. The Earth’s rotation is responsible for the daily cycles of day and night. At any moment in time, one half of the Earth is in sunlight, while the other half is in darkness.
The Earth and all other celestial bodies in the Solar System are constantly moving. Rotation, precession and revolution of Earth are directly responsible for seasonal variations in a year. The term ‘Earth Rotation’ refers to the spinning of our planet on its axis, with an equatorial speed of 1040 miles per hour (about 465 meter per second or slightly over 1675 km per hour). One rotation takes twenty-four hours (23.93 hour) and is called a mean solar day. The Earth’s rotation is responsible for the daily cycles of day and night. At any moment in time, one half of the Earth is in sunlight, while the other half is in darkness.
The Earth's rotation axis is not fixed in the space. The direction of the rotation axis executes a slow ‘Precession’, caused by the gravitational pull of the Sun and the Moon on the Earth. Through each 26 000-year cycle, the direction in the sky to which the axis points goes around a big circle, the radius of which covers an angle of about 23.50. This precession also has an effect on the seasons.
The Earth's rotation axis is not fixed in the space. The direction of the rotation axis executes a slow ‘Precession’, caused by the gravitational pull of the Sun and the Moon on the Earth. Through each 26000-year cycle, the direction in the sky to which the axis points goes around a big circle, the radius of which covers an angle of about 23.50. This precession also has an effect on the seasons.
The orbit of the Earth around the Sun is called an ‘Earth Revolution’. This celestial motion takes 365.26 days to complete one cycle. Further, the Earth's orbit around the Sun is not circular, but oval or elliptical. An elliptical orbit causes the Earth's distance from the Sun to vary over a year.
The orbit of the Earth around the Sun is called an ‘Earth Revolution’. This celestial motion takes 365.26 days to complete one cycle. Further, the Earth's orbit around the Sun is not circular, but oval or elliptical. An elliptical orbit causes the Earth's distance from the Sun to vary over a year.