Why do we always see the same side of the moon?

A. because one side of the moon is never in the sunlight.
B. because its phases are not the same every night.
C. because it rotates around the Earth at the same rate it revolves on its axis.
D. We don't always see the same side of the Earth.

Question

Why do we always see the same side of the moon?

A. because one side of the moon is never in the sunlight. 	
	B. because its phases are not the same every night. 	
	C. because it rotates around the Earth at the same rate it revolves on its axis. 	
	D. We don't always see the same side of the Earth.

anonymous · Answer

Ans is C. Moon's rotation around its axis and its revolution around Earth have the same period.

anonymous · Answer

It is believed that the moon was once molten. At that time, the lunar lava oceans had tides - just like the today's Earth's oceans. These tides were caused by Earth's gravity . They used to race around the moon's surface following the position of the Earth. Eventually the lava oceans solidified and the tides were frozen in position. The high tide region ended up facing the Earth all the time - and making moon's rotation period equal to its orbital period.

anonymous · Answer

This is known as the "KEEL" effect, thus the moon faces us the same way always.