The celestial body that serves as the Earth's natural satellite is the Moon. The Moon orbits Earth approximately every 27.3 days and influences various natural phenomena, including ocean tides due to its gravitational pull. It has been a source of fascination for humans for centuries, appearing in mythologies, stories, and scientific studies. The Moon is the fifth largest satellite in the solar system and is known for its phases, ranging from new moon to full moon, as it reflects sunlight. Its surface features include craters, plains, and mountains, making it a target for exploration.