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PHYS 162 Elementary Astronomy - page 13 / 29

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PHYS 162 Class 1

PHYS 162 Class 1

Easy/Early Observations

Regular predictable motion

   sun,moon,stars          Daily

   moon                         Monthly

   stars                           Yearly

   seasons                      Yearly

which are readily explained by having the Earth spin (daily) and orbit the Sun (yearly)

unpredictable motion (comets,novas) considered disturbing/evil

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