The term for the natural satellite of the Earth is "Moon." The Earth has one Moon, which is the fifth largest moon in the solar system. It is believed to have formed about 4.5 billion years ago, likely resulting from a massive collision between Earth and a Mars-sized body. The Moon significantly influences life on Earth, affecting ocean tides and the planet's axial tilt, which has implications for climate and seasons. The Moon has been a source of fascination and study for humans, inspiring art, literature, and scientific exploration.