Why is the moon in continous orbit with the Earth?
The Earth’s Moon is the fifth largest in the whole solar system, and is bigger than the planet Pluto. Earth’s gravity pulls on the Moon and keeps it in orbit. The Moon’s orbit is almost a perfect circle, so the Moon is about 384,400 km away all the time. Although the Sun is really much bigger than the Moon, the Moon is much closer, so it appears to be the same size as the Sun in our sky.It takes the Moon about 27 days to go around the Earth once. If you check on the Moon several times during one night, you will notice that it moves relative to the stars around it. As the Moon goes around the Earth, different portions of it are lit up by the Sun, causing lunar phases. It takes the Moon one month to go through all its phases. Have you ever heard the term the ‘far-side’ of the Moon? The Earth’s gravity produces tidal forces on the Moon. This causes the same side of the moon to always face the Earth. People living on the Earth can never see the ‘far-side’ of the Moon, unless they go there!
