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Equatorial Sundial

auteur: S.Beaucourt/Novapix

référence: a-cad01-00160

Image Size 300 DPI: 32 * 21 cm

In an equatorial sundial, the planar surface that receives the shadow, is exactly perpendicular to the gnomon's style. This plane is called equatorial, because it is parallel to the equator of the Earth.

Keywords for this photo:

ASTRONOMY - MEASURE - SCIENTIFIC INSTRUMENT - SHADOW - SUN - SUNDIAL - TIME -