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UPSC Prelims 1985 · World Geography · Earth in Space

The earth rotates around its axis from

Show the answer and explanation

Answer: (b) West to East

Earth rotates from west to east — so the Sun rises in the east.

The idea

The apparent daily motion of the sky is opposite to Earth’s actual rotation. As Earth turns, each location enters and leaves the sunlit half of the globe. The rotation direction is described relative to the poles, not by the movement of an observer on the surface.

Earth turns west to east → A place turns into the sunlit half → Sun appears to rise in the east → Place turns across the sunlit half → Sun appears to set in the west

Why the others are wrong

(a) That is the Sun’s apparent motion.

The trap

The Sun seems to move east to west because Earth turns west to east.

Also know

Viewed from above the North Pole, Earth’s rotation is anticlockwise; viewed from above the South Pole, it is clockwise. Rotation causes day and night, while revolution together with axial tilt causes seasons. Venus has retrograde rotation, so the Sun’s daily direction there is reversed.

🔒 Rotation W→E (anticlockwise seen from above the North Pole).

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