The celestial body that orbits the Earth is the Moon. The Moon is Earth's only natural satellite and is the fifth largest moon in the solar system. Its gravitational influence is significant, affecting ocean tides on Earth. The Moon has varying phases, which are created as it orbits the Earth, reflecting different portions of its surface illuminated by the Sun. Furthermore, the Moon plays a crucial role in space exploration and has been a focal point of human interest, as evidenced by the Apollo missions, during which astronauts landed on its surface for the first time in 1969.