1. The Earth-Moon-Sun System

2. Rotation vs. Revolution
Rotation – the spinning of a body on its axis
Revolution – the motion of a body along a path around some point in space

3. Precession
The slight movement of Earth’s axis over a period of 26,000 years

4. Seasons Caused because Earth’s axis is tilted 23.5 degrees
Summer – N. Hemisphere is farthest from sun
Winter – N. Hemisphere is closest to sun

5. The moon does not make it’s own light. It reflects sunlight.
Moon Shine
The moon does not make it’s own light. It reflects sunlight.

6. Waxing & Waning Waxing – Light side gets larger
Waning – Light side gets smaller
New Moon First Quarter Full Moon Third Quarter New Moon
Animation

7. Phases of the Moon

8. Eclipses
Lunar: The shadow from Earth blocks the light from the sun. Lunar = Moon goes dark.
Solar: The shadow from the Moon blocks the light from the sun. Solar = Sun goes dark.

9. Umbra & Penumbra
The Moon & Earth cast 2 shadows. The darkest is the Umbra. The lighter is the Penumbra.

11. The Origin of the Moon
It is widely believed that the moon was formed when a Mars sized object smashed into the early Earth.

12. The Lunar Surface
Craters – round depressions in the surface of the moon – most were produced by the impact of rapidly moving debris

13. Highlands – densely pitted, light-colored areas that cover most of the lunar surface

14. Maria – dark, smooth surfaces – originated when asteroids punctured the lunar surface, letting magma bleed out

15. Lunar Regolith – a soil-like layer of gray debris covering the surface of the moon – made up of rocks, glass beads, and fine lunar dust

16. Tides
Tides are the regular rise and fall of the ocean, caused by the moon’s gravitational pull on Earth.
Spring Tide- sun, earth, moon in straight line and change between high and low tides are greatest
Neap Tide- sun and moon are pulling at earth at right angles resulting in little change in low and high tides