7
Phases
of the Moon and its orbit around the Earth (1).
1.Everything (almost) in the solar system rotates or orbits counterclockwise, as seen from the North.
2.The illumination of the Earth and the moon will be almost the same, since the sun is so far away that both receive light from (almost) the same direction.
3.It takes 4 weeks for the moon to complete an orbit of the earth.
4.The moon is phase-locked. In other words, we always see the same face, although the illumination pattern we see changes. How long is a lunar day?
From our text:
Horizons, by Seeds