1. Earth’s first satellite
The Moon
Earth’s first satellite

2. The Moon Since the moon is not a star, it can’t produce its own light
Instead, moon is a satellite (orbits Earth)
Light we see is reflected sunlight

3. The Moon Did you know… The moon is ‘egg-shaped’?
The moon moves 3.8 cm away from us each year?
Earth’s gravity causes ‘moonquakes’?
More than 400 trees are planted in the U.S that were germinated on the moon

4. The Moon
Did you know…
The moon was created when a rock the size of Mars struck Earth as the solar system formed – about 4.5 billion ya.
We see the same side of the moon all the time…here’s why…

5. Lunar Orbit The moon rotates once on its axis every 29.5 days
The moon takes the same 29.5 days to circle the Earth (its orbital period)
Since the two times are the same, it means we see the same face of the Moon all the time

6. Phases of the Moon
Total Lunar Eclipse - February 20, 2008

7. Name the Phases “waxing” means getting bigger
“waning” means getting smaller

9. Phases of the Moon Teacher’s Domain “Phases of the Moon”
YouTube “Phases of the Moon 3D animation” and Bill Nye

10. Tides The moon’s gravity exerts a pull on Earth
The ocean directly in line with the moon is pulled slightly toward it – a high tide
The opposite side of the Earth also gets a high tide because the planet is being pulled toward the moon, as well.

11. Tides Spring tides – when Sun and moon are aligned
Neap tides – when Sun and moon are not aligned

12. Tides
What do tides look like on Earth?

14. Eclipses Lunar Eclipses
When moon moves into Earth’s shadow (Full Moon)
Not every month – orbital planes have to line up
Happen times per year
Everyone on night side of Earth can see it

15. Eclipses Lunar Eclipses
Moon glows red because indirect sunlight is filtered by our atmosphere (filters out blue light)

17. Lunar Eclipse from the moon

18. Eclipse Geometry

19. YouTube videos “What causes an Eclipse of the moon”
“Total Lunar Eclipse - February 20, 2008”

20. Eclipses Solar Eclipses
When moon moves between the Sun and Earth’s (New Moon)
Moon blocks out some or all of the Sun’s light
Happens rarely
Very small area affected

21. Solar Eclipse

22. Eclipses Solar Eclipses
Can be partial if moon blocks a portion of Sun’s light

23. Solar Eclipse on Earth
Area of ‘totality’