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4.2. Phases of the Moon

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To explain the regular phenomenon of the phases of the moon, two perspectives - one from the earth and one from outside the earth and moon, have to be kept active in thought. This seems to be a mental challenge for many students. The video supports this mental task. In a virtual trip, starting from the earth, circulating around earth and moon and ending again on the earth, these two perspectives are brought rather closely together.

phases_of_the_moon.mpg (11 MB)

phases_of_the_moon.wmv (1,1 MB) (lower resolution)