In this episode of Crash Course Astronomy, Phil takes you through the cause and name of the Moon's phases.

--

Why the Moon Has Phases 0:36.1
Spheres in Orbit 1:05.4
Name of the Moon Phases 2:25.5
How We See It 7:48.2

--

PBS Digital Studios: youtube.com/pbsdigitalstudios

Follow Phil on Twitter: twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - www.facebook.com/YouTubeCrashCourse
Twitter - www.twitter.com/TheCrashCourse
Tumblr - thecrashcourse.tumblr.com
Support CrashCourse on Subbable: subbable.com/crashcourse

--

PHOTOS
en.wikipedia.org/wiki/Moon#mediaviewer/File:FullMoon2010.jpg
solarsystem.nasa.gov/multimedia/display.cfm?IM_ID=1879
svs.gsfc.nasa.gov/vis/a000000/a004200/a004236/frames/730x730_1x1_30p/moon.0505.jpg
svs.gsfc.nasa.gov/vis/a000000/a004200/a004236/frames/730x730_1x1_30p/moon.0553.jpg
svs.gsfc.nasa.gov/vis/a000000/a004200/a004236/frames/730x730_1x1_30p/moon.0634.jpg
svs.gsfc.nasa.gov/vis/a000000/a004200/a004236/frames/730x730_1x1_30p/moon.0706.jpg
svs.gsfc.nasa.gov/vis/a000000/a004200/a004236/frames/730x730_1x1_30p/moon.0809.jpg
svs.gsfc.nasa.gov/vis/a000000/a004200/a004236/frames/730x730_1x1_30p/moon.0905.jpg
svs.gsfc.nasa.gov/vis/a000000/a004200/a004236/frames/730x730_1x1_30p/moon.1011.jpg
svs.gsfc.nasa.gov/vis/a000000/a004200/a004236/frames/730x730_1x1_30p/moon.1145.jpg
en.wikipedia.org/wiki/Moon#mediaviewer/File:NASA-Apollo8-Dec24-Earthrise.jpg
global.jaxa.jp/press/2008/04/img/20080411_kaguya_01l.jpg
global.jaxa.jp/press/2008/04/20080411_kaguya_e.html
www.esa.int/Our_Activities/Operations/First_view_of_Earth_as_Rosetta_approaches_home
commons.wikimedia.org/wiki/File:Sachin_Nigam_-_starry_moon_%28by-sa%29.jpg
www.flickr.com/photos/badastronomy/14397419837/

1. Introduction to Astronomy
2. Naked Eye Observations
3. Cycles in the Sky
4. Moon Phases
5. Eclipses
6. Telescopes
7. The Gravity of the Situation
8. Tides
9. Introduction to the Solar System
10. The Sun
11. The Earth
12. The Moon
13. Mercury
14. Venus
15. Mars
16. Jupiter
17. Jupiter's Moons
18. Saturn
19. Uranus & Neptune
20. Asteroids
21. Comets
22. The Oort Cloud
23. Meteors
24. Light
25. Distances
26. Stars
27. Exoplanets
28. Brown Dwarfs
29. Low Mass Stars
30. White Dwarfs & Planetary Nebulae
31. High Mass Stars
32. Neutron Stars
33. Black Holes
34. Binary and Multiple Stars
35. Star Clusters
36. Nebulae
37. The Milky Way
38. Galaxies, part 1
39. Galaxies, part 2
40. Gamma-Ray Bursts
41. Dark Matter
42. The Big Bang, Cosmology part 1
43. Dark Energy, Cosmology part 2
44. A Brief History of the Universe
45. Deep Time
46. Everything, The Universe...And Life
47. Explore The Solar System:

In this Crash Course series, marvel at the wonders of astronomy with your host for this intergalactic adventure, the Bad Astronomer himself -- Phil Plait. In just 40 short lessons, you will learn the basics of the oldest science known to humanity.

Be sure to check out links to relevant Photos in the description for each video.