The Moon shows the same face to the Earth because
a) It is not rotating on its own axis
b) Its rotation and revolution are opposite
c)Its periods of rotation and revolution are the same
d) Its rotation is faster than its revolution
Answer. c) Its periods of rotation and revolution are the same
The Moon shows the same face as the Earth always because the moon's period of rotation and revolution are precisely the same. It is about 27 days.
About Moon:
The moon is a natural satellite of the Earth.
The radius of the moon is 1737.1 km.
Its rotation ( around its axis) and revolution ( around the earth) time is the same, it is 27 days.
Moonlight takes about 1.3 seconds to reach the Earth whereas sunlight takes 498 seconds to reach on Earth's surface. The speed of light is about 3* 10^8 meters per second.
The average distance between the moon and the Earth is about 3,84,400 km.
When the moon is at its farthest distance from Earth, this position of earth and moon is known as apogee. The distance between this position is about 4,05,500 km.
When the moon is at its closest distance from Earth, this position of earth and moon is known as perigee. The distance between this position is about 3,63,104 km.
The gravitation force of the Moon is about one-sixth of Earth's.
There is no atmosphere on the moon, therefore sound waves cannot travel on the moon.
Neil Armstrong [ Aldrin is the second] became the first human to step on the moon on 21 July 1969.
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