Join Phil for a tour of our capital-M Moon, from surface features, inside to the core, and back in time to theories about its formation.

This episode is brought to you by Squarespace: www.squarespace.com/crashcourse

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Table of Contents
Many Millions of Moons 0:27
Big Impact on Little Earth 3:42
Craters and Maria 2:15
Water on the Moon? H2O Yeah! 8:06

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PHOTOS/VIDEOS
Moon Phase 47.7% svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=3894 [credit: NASA/Goddard Space Flight Center Scientific Visualization Studio]
The Blue Marble visibleearth.nasa.gov/view.php?id=57723 [credit: Credit: NASA Goddard Space Flight Center Image by Reto Stöckli]
Dramatic Moonset www.eso.org/public/images/potw1023a/ [credit: G.Gillet/European Southern Observatory]
Structure of the Moon: en.wikipedia.org/wiki/Moon#mediaviewer/File:Moon_diagram.svg [credit: Kelvin Song via WikiMedia Commons]
Crater Science Investigations: svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10792 [credit: NASA/Goddard Space Flight Center]
Lunar crater Daealus commons.wikimedia.org/wiki/File:Lunar_crater_Daedalus.jpg [credit: NASA]
Mare Humorum commons.wikimedia.org/wiki/File:Mare_Humorum_-_LROC_-_WAC.JPG [credit: NASA]
Luna 3: nssdc.gsfc.nasa.gov/imgcat/html/object_page/lu3_1.html [credit: NASA]
Farside!: lroc.sese.asu.edu/posts/298 [credit: NASA/GSFC/Arizona State University]
Theia Earth Collision: io9.com/the-incredibly-violent-history-of-earths-moon-1098565110 [credit: Ron Miller, used with permission]
Earth Seen From Early Moon: io9.com/the-incredibly-violent-history-of-earths-moon-1098565110 [credit: Ron Miller, used with permission]
Moon Struck: svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10931 [credit: NASA's Goddard Space Flight Center]
Tycho: www.nasa.gov/images/content/417417main_tychofull-20100115-full.jpg [credit: NASA/Goddard/Arizona State University]
Double crater on the moon: www.esa.int/spaceinimages/Images/2006/09/Double_crater_on_the_Moon [credit: ESA/SPACE-X (Space Exploration Institute)]
Stream of Craters: www.nasa.gov/mission_pages/LRO/multimedia/lroimages/lroc_20090810_craterstream.html [credit: NASA/Goddard Space Flight Center/Arizona State University]
Full Moon: en.wikipedia.org/wiki/Moon#mediaviewer/File:FullMoon2010.jpg [credit: Gregory H. Revera]
Rille on the valley floor, photographic mosaic from Apollo 15: en.wikipedia.org/wiki/Schroter%27s_Valley#mediaviewer/File:Vallis_Schroteri.jpg [credit: NASA]
New Views of Lunar Pits: lroc.sese.asu.edu/posts/230 [credit: NASA/GSFC/Arizona State University]
Crater Erlanger: www.nasa.gov/mission_pages/Mini-RF/multimedia/erlanger_crater.html [credit: NASA/GSFC/Arizona State University]

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.