Cycles in the Sky: Crash Course Astronomy #3

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. -- Table of Contents: Naked Eye Observations 0:28.4 Constellations 3:09.7 The Color of Stars 2:44.5 View of the Stars 7:25 -- PBS Digital Studios: Follow Phil on Twitter: Want to find Crash Course elsewhere on the internet? Facebook - Twitter -