Phases of the Moon Part I. 6 th Grade. 8 phases of the moon!. Is there ever a time that the moon is completely lit up?. NO! Only half of the Moon is always lit up by the sun . As the Moon orbits the Earth, we see different parts of the lighted area.
The revolution of the Moon around the Earth makes the Moon look as if it is changing shape in the sky. This is caused by the different angles from which we see the lighted part of the Moon's surface. These are called "phases" of the Moon.