The moon is smaller than the earth. It is more than three hundred and eighty thousand kilometers away from us. In 1969, two Americans got to the moon by spaceship. They found no living things there. And there is no air or water there. It is too hot in the day and too cold at night, so nothing can live on the moon. Everything on the moon is much lighter because there is no gravity. Walking on the moon is like jumping and flying. So we can jump higher on the moon than on the earth. The moon is bigger than the earth.