Question

How much time does it take for Earth to A) make 1/4 of a revolution about the Sun? and B) 3/4 of a rotation on its axis? (Do not calculate anything: your answers are related to the astronomical basis for our calendar.)

Answer 1

Solutions :

Part ? Solution :

The motion around the sun along its orbit is called a revolution. The amount of time it takes for a single trip around the sun is called a period of revolution. The period for the Earth to revolve around the sun is 365.24 days or one year.

Thus, The time taken by Earth to make 1/4 of a revolution about the Sun = (1/4)(365.24 days) = 91.31 days

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Part ? Solution :

Similarly, The motion of earth around its axis is called a rotation. The amount of time it takes for a single rotation around the axis is called a period of rotation. The period for the Earth's rotation is 24 hours.

Thus, The time taken by Earth to make 3/4 of a rotation on its axis = (3/4)(24 hours) = 18 hours