Moon Phases: Crash Course Astronomy #4. Episode 4 | 9m 45s. Phil takes you through the cause and name of the Moon's phases. Aired 02/05/2015 | Rating NR ...

I also wanted to talk about the phases of the Moon used in history (religious calendars being a big one), the differences between sidereal and synodic motions of the Moon, how some years have 13 ...