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: http://www.squarespace.com/crashcourse Check out the Crash Course Astronomy solar system poster here: null -- Chapters: Introduction: The Moon 00:00 How Big is the Moon? 0:54 Internal Structure of the Moon 1:56 The Moon's Surface: Highlands and Maria 2:15 How the Moon Formed: The Giant Impact Hypothesis 3:42 The Moon's Craters 6:32 Water on the Moon? H2O Yeah! 8:06 Review 9:06 -- PBS Digital Studios: null Follow Phil on Twitter: https://twitter.com/badastronomer Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: null -- PHOTOS/VIDEOS Moon Phase 47.7% http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=3894 [credit: NASA/Goddard Space Flight Center Scientific Visualization Studio] The Blue Marble http://visibleearth.nasa.gov/view.php?id=57723 [credit: Credit: NASA Goddard Space Flight Center Image by Reto Stöckli] Dramatic Moonset http://www.eso.org/public/images/potw1023a/ [credit: G.Gillet/European Southern Observatory] Structure of the Moon: http://en.wikipedia.org/wiki/Moon#mediaviewer/File:Moon_diagram.svg [credit: Kelvin Song via WikiMedia Commons] Crater Science Investigations: http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10792 [credit: NASA/Goddard Space Flight Center] Lunar crater Daealus http://commons.wikimedia.org/wiki/File:Lunar_crater_Daedalus.jpg [credit: NASA] Mare Humorum http://commons.wikimedia.org/wiki/File:Mare_Humorum_-_LROC_-_WAC.JPG [credit: NASA] Luna 3: http://nssdc.gsfc.nasa.gov/imgcat/html/object_page/lu3_1.html [credit: NASA] Farside!: http://lroc.sese.asu.edu/posts/298 [credit: NASA/GSFC/Arizona State University] Theia Earth Collision: http://io9.com/the-incredibly-violent-history-of-earths-moon-1098565110 [credit: Ron Miller, used with permission] Earth Seen From Early Moon: http://io9.com/the-incredibly-violent-history-of-earths-moon-1098565110 [credit: Ron Miller, used with permission] Moon Struck: http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10931 [credit: NASA's Goddard Space Flight Center] Tycho: http://www.nasa.gov/images/content/417417main_tychofull-20100115-full.jpg [credit: NASA/Goddard/Arizona State University] Double crater on the moon: http://www.esa.int/spaceinimages/Images/2006/09/Double_crater_on_the_Moon [credit: ESA/SPACE-X (Space Exploration Institute)] Stream of Craters: http://www.nasa.gov/mission_pages/LRO/multimedia/lroimages/lroc_20090810_craterstream.html [credit: NASA/Goddard Space Flight Center/Arizona State University] Full Moon: http://en.wikipedia.org/wiki/Moon#mediaviewer/File:FullMoon2010.jpg [credit: Gregory H. Revera] Rille on the valley floor, photographic mosaic from Apollo 15: http://en.wikipedia.org/wiki/Schroter%27s_Valley#mediaviewer/File:Vallis_Schroteri.jpg [credit: NASA] New Views of Lunar Pits: http://lroc.sese.asu.edu/posts/230 [credit: NASA/GSFC/Arizona State University] Crater Erlanger: http://www.nasa.gov/mission_pages/Mini-RF/multimedia/erlanger_crater.html [credit: NASA/GSFC/Arizona State University]