A 5 / The Moon

    The moon is the earth's nearst neighbor. It is only about a quarter of a million miles away. This is a very short distance compared with other distance in space. The diameter of the moon is just a little more than one-fourth the diameter of the earth.
    The moon circles the earth every twenty-eight days. It also rotates on its ow axis. It makes one complete turn every twenty-eight days. It keeps the same side to the earth at all times.
    The moon gets its light from the sun. The moon shines during the day as well as at night. Moonlight is really only secondary sunlight.
    The moon has no atmosphere. So the moon is exposed to the radiation from the sun and the space. Human can not live on the moon.