This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe.

Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crash...

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Chapters:
Introduction 00:00
Cycles in the Sky 0:42
The Zodiac 2:10
Planetary Movement 2:59
The Earth's Axis 3:36
Precession 6:09
Things We've Learned From Naked Eye Observations 7:09
Review 8:40

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PHOTOS
http://en.wikipedia.org/wiki/Right_as...
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http://en.wikipedia.org/wiki/Libra_(c...
http://en.wikipedia.org/wiki/Virgo_(c...
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http://en.wikipedia.org/wiki/Cancer_(...
http://en.wikipedia.org/wiki/Globe#me...
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