1. The Earth’s Moon The Earth’s Moon The Earth’s Moon
The moon is about 1/4 the size of Earth
The phases are caused by the moon’s revolution around the Earth
The moon rotates and revolves at the same rate, so we always see the same side of the moon from the Earth

2. More on the Moon...
The moon is pockmarked with craters because it has no atmosphere
“waxing” means the moon’s illuminated face is increasing each day or night; “waning”means it is decreasing.
The moon was most likely created when a large planetesimal crashed into Earth, splashing some of it into space.

3. Lunar eclipses
Generally, the moon is a little above or below the plane of the Earth’s orbit.When the moon does pass directly behind the Earth into its shadow, a lunar eclipse results.

4. Solar Eclipses
Solar eclipses happen in the new moon position, when the Earth, Moon and Sun line up.
Solar glasses are needed!

6. The length of time for the moon to go from a full moon to a full moon.
Lunar Month
The length of time for the moon to go from a full moon to a full moon.

7. Reasons for phases
We see lunar phases because the moon revolves around the Earth
The moon rises 52 minutes later each day because as Earth rotates, the moon revolves part way around Earth.
A lunar month is 29 1/2 days. The actual period of revolution is 27 1/3 days.

8. Eclipses Lunar eclipses occur in the full moon position
Solar eclipses occur in the new moon position
Eclipses only happen when the moon, sun and earth line up.

9. Tides
There is a high tide under the moon and 180 degrees on the other side of Earth.