1. Our Moon

3. Moon Orbits the Earth – but appears to rise in the east and set in the west due to earth’s faster rotation
13 ° a day rotation of moon compared to 15° per hour of earth --- earth rotates faster than the moon revolves around the earth

5. Moon’s Rotation = Moon Revolution
rotation period =
27.3 days
revolution period = 27.3 days
Moon shows the same “face” to the Earth
Velocity: 360°/27.3 days = 13° per day

6. Daily Movement of the Moon
Each day the Moon rises in the east and sets in the west as a result of the Earth's rotation.
It moves about 13° eastwards against the background of stars as a consequence of its revolution around the Earth.

7. Moon Phases Half of the moon is always receiving light from the sun.
The “lit” portion that is visible to earth varies as the moon REVOLVES around earth. THIS CAUSES THE PHASES OF THE MOON.
Visible portion of moon growing = waxing
Visible portion of moon shrinking = waning

8. Lunar Phases

10. Cycle of Lunar Phases Takes 29.53 days
This is because when moon gets back to its original position in 27.3 days, the earth has moved 1°/day or about 27°.
The moon moving at l3°/day takes about 2 days to catch up with Earth and align with it and the sun in a new moon phase.
The moon rises above the horizon at a different time each day (or night). This happens because every time Earth spins around once, the moon moves about l3° eastward along its orbit. The earth must rotate an extra l3 deg. More each day for a point on its surface to be roughly under the moon again. Earth takes 50 minutes to spin 13 deg., the moon rises about 50 minutes later each day and sets about 50 minutes later as well.

11. Lunar and Solar Eclipses
The Moon orbits the Earth, and travels with the Earth about the Sun. 
Sometimes the Moon gets between the Earth and the Sun, causing solar eclipses, and sometimes the Moon goes into the Earth's shadow, causing lunar eclipses.

12. Solar Eclipses – can occur only during the new moon phase
Lunar eclipses – can occur only during the full moon phase

13. The Cause of Eclipses: Shadows

14. Lunar Eclipses

15. Solar Eclipses

16. Solar Eclipses Occur when moon’s orbit intersects ecliptic during the new moon phase