The moon is Earth's only natural satellite and is the fifth-largest satellite in the solar system. It orbits our planet at an average distance of 238,855 miles and takes approximately 27.3 days to complete one orbit. The moon has a significant influence on Earth's tides and has played a role in various mythologies and cultural beliefs throughout history. It is also the only celestial body that humans have set foot on, with the first moon landing occurring in 1969. While it may appear to have a smooth, round surface, the moon is actually covered in craters, mountains, and valleys. It is constantly changing due to the impact of meteors and the gradual erosion of its surface. Scientists continue to study the moon to learn more about its formation and evolution, as well as its potential for future human exploration and colonization.