As most people know, the Moon is Earth’s only satellite (or “moon”), and it circles the Earth from a distance of 360000km. This giant rock was most likely formed from a gargantuan heavenly body colliding into the young Earth, displacing material from it.
The Moon also has oceans, but they are flat, barren rockbeds. As it has a geography, we see a pattern on the lunar surface, which people interpret as the Moon rabbit, Man on the Moon, crab, beautiful woman and whatever else they see through the power of pareidolia.
The Moon, which forms the basis of yin and yang with the Sun, has had a significant impact in every civilisation. In the East, the lunar calendar is still used and many festivals are set to it (such as the Lantern Festival and Mid-Autumn Festival). In the West, the Moon has been associated with lunacy, so called the “lunar effect”. Some people (including Aristotle) believe that people act more crazy and criminal when a full moon is up (werewolves and the Cheshire Cat’s “crescent moon” grin are also linked to this symbolism).
As such, the Moon has always been an important part of human societies. Without it, there would be no tides, the lunar calendar would be useless, the night sky would be darker, werewolves would not terrorise the forests, and most importantly, Sailor Moon would not be able to stop criminals in the name of justice.