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Earth, Moon and Sun L16-33

16  Planet Earth
Video - Crash Course - The Earth
Van Allen Belts

17  Observatory Earth

18  Observing the Moon

20  Exploring the Moon

21 Origin of the Moon

22  The Sun

23  Sunspots

24  The Sun as a Star

25  Observing the Sun

27  Eclipses

28  Time

29  Aurorae

30  The Heliocentric Model

31  Galileo

32  Gravity

33  Planetary Discovery