The Buwan, or Moon, is Earth's only natural satellite and the fifth largest moon in the solar system. It orbits Earth at an average distance of about 384,400 kilometers (238,855 miles) and has a diameter of approximately 3,474 kilometers (2,159 miles). The Moon plays a crucial role in influencing Earth's tides due to its gravitational pull. The surface of the Moon is covered with craters, mountains, and flat plains called maria. It has no atmosphere, which means there is no weather or sound. The Moon goes through phases, including the new moon, first quarter, full moon, and last quarter, as it orbits Earth and reflects sunlight.