The moon completes ____ rotation on its axis as it completes one revolution around the Earth.

Question

Question

This question was previously asked in

SSC CPO 2022 Tier-I Official Paper (Held On : 9 Nov 2022 Shift 1) [Answer Key]

Answer 1

The correct answer is 1.

Key Points

Since the moon takes 27.322 days to complete one revolution around the earth and also the period of the rotation of the moon on its axis takes around 27.3 days
Thus, the rotation time of the moon to rotate on its axis overlaps with its revolution along with the orbital plane. The moon completes 1 rotation on its axis as it completes one revolution around the Earth. As a result, we will see somewhat, Moon always has the same face towards the earth.
The moon travels around the earth in an elliptical orbit.
When the moon is closest to earth, its rotation is slower. so an additional 8 degrees are visible on the eastern side.
When the moon is farthest from the earth, its rotation is faster. so, an additional 8 degrees are visible on the western side.

Additional Information

Phases of the moon:
- New Moon: On this day, the moon is between the earth and the sun align in a straight line. And the moon becomes invisible.
- Full moon: On this day, a perfect round-shaped moon appears.
- Crescent Moon: The shape of the moon during the phases between the new moon and half-moon is the crescent moon.
- Gibbous Moon: The shapes of the moon during the phases between the full moon and half-moon are the gibbous moon. Since the moon takes 27.322 days to complete one revolution around the earth and also the period of the rotation of the moon on its axis takes around 27.3 days