Investigating celestial motion models is the focus of this Earth-Moon-Sun (EMS) astronomy unit. The model involves relevant motions of these objects that can be used to explain Earth-based astronomical phenomena—day and night, sunrise and sunset, moonrise and moonset, Moon face, Moon phases, eclipses, and seasons.
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Type Journal ArticlePub Date 9/1/2001Stock # tst01_068_06_34Volume 068Issue 06