The moon is the most visible heavenly object in the sky — if it is in the visible part from Earth’s perspective. The Moon rotates above us glowing, bright and round until it hides from our sight for several nights. The Moon's phases cycle has led people since the time immemorial. Let’s take months, they are almost equal to the duration of the Moon phases from full to new and so on.
Moon cycle and the moon's orbit hold lots of secrets. For instance, the moon always demonstrates the same side to people. The reason behind it, is that complete Moon cycle takes approximately 27.3 days in total to rotate on its axis and to go full circle our planet. We can differentiate in the sky the full Moon, the half-Moon or no visible Moon, not because the Moon shines, but because it reflects the sunlight. The amount of the Moon’s body which is visible in the sky correlates with its location relatively to the Sun.
Even if the Moon is just a satellite and is not considered to be a planet, it is 2,159 mi, and still has huge size compared to Pluto. There are 4 more moons in solar system which have even larger size. The Moon is a little bit more than 27% of the size of our planet, it is way smaller than any other moon of any planet. This way it becomes an object that influences our planet, probably, without Moon there will be no life on Earth as we imagine it today.
How was it the moon created?
Scientists still argue about the origin of the Moon, creating lots of theories regarding it. However, recent studies tend to unify all the theories. The main theory is that long time ago due to huge collision with unknown object, a massive piece of the Earth (imagine the size of planet Mars) was separated from its body. The Earth was on its first stages of formation, so the texture of the Moon is different, though the analysis shows that chemical composition has lots in common. Probably it happened 100 million years after the creation of our solar system. The Moon and the Earth have more than 180 elements similar in their composition structure.
Even though this theory is really popular among scientists, there are also other theories regarding the origin of the Moon. The range of the theories varies and almost every scientific community has its own that involves Earth’s gravity, Venus that lost its part etc.