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- What is Diurnal Motion?
- How did the ancient Egyptians use coffin-lid decans as star clocks?
- Polaris: Star of
the Pole
- What is Circumpolar Motion?
- A star chart for any time of night: How to use a Planisphere
- Make a Star Clock
and tell time by the Big Dipper!
- What is Local Time?
- What is the International Date Line?
- Around the World in 80 days.
- Around the World in 8, 9, or 10 days.
- The Island of the Day Before.
- What is Universal Time (UT)?
- A late night at the office: Marking Time with Matins in a medieval
monastery.
- Diurnal Skywatch
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Diurnal
Motion