Why do we get to see only side moon🌕from the earth🌎?
http://earthsky.org/space/how-much-of-the-moon-can-we-see-from-earth-lunar-libration
http://news.nationalgeographic.com/news/2004/07/0714_040714_moonfacts.html
We only see one side of the moon from Earth because of a phenomenon called tidal locking. Tidal locking is the result of the gravitational forces between the Earth and the moon, which cause the moon's rotation to become synchronized with its orbit around the Earth.
To understand why this happens, imagine you are holding a basketball (representing the Earth) in one hand and a tennis ball (representing the moon) in the other. Now, rotate the tennis ball around the basketball while also spinning it on its axis. However, notice that as you rotate the tennis ball, you always keep the same side facing the basketball. This is similar to what happens with the moon.
The moon takes approximately 27.3 days to complete one full orbit around the Earth. During this time, it also takes around 27.3 days for the moon to complete one full rotation on its axis. As a result, the same side of the moon always faces the Earth, giving us the impression that we can only see one "side" of the moon.
However, it's worth noting that over time, the moon does have a slight wobble called libration, which allows us to see about 59% of its surface. But to observe the hidden 41% of the moon's surface, we rely on spacecraft or telescopes that can capture images from different angles.
In conclusion, tidal locking and the synchronization of the moon's rotation with its orbit around the Earth are responsible for us seeing only one side of the moon.