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PHYS 162 Elementary Astronomy - page 23 / 29

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PHYS 162 Class 1

PHYS 162 Class 1

The Year

Two Indicators

Due to the Earth’s tilt the

     Length of the Day  and Sun’s path through the sky vary. One year = returns to the same spot

More dramatic further north (Stonehenge)

Which stars are overhead changes with seasons. Gives passage of year

 Passage of time at night also given by stars’ apparent motion

   Stars = Calendar and Clock

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