What is the closest cosmic body to the earth?

The closest cosmic body to the Earth can be safely called its natural satellite – the Moon. All the inhabitants of the planet see it both night and day, in different forms, ranging from the remarkable in its beautiful form – the crescent. At night, it even gives us a little light and generally has a serious impact on earthly nature. The moon is close also because this is the only place where people have been. These were American astronauts who even wandered around it a little. By the way, you can recall Dunno, he also had a period of stay on the moon, but this is a separate book.