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At a particular place, the position of the sun in the sky is linked to time and it is thus possible to use this daytime star to determine the time; but it is not quite as simple as that...
To choose : or ?
- The gnomon's shadow

- A horizontal sundial

- A vertical sundial (local meridian)

- An analemmatic sundial

- The reduction at the equator

- The Figure of Eight of Mean Time

- The Equation of time

- From sundial to watch
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