Equatorial sundial. On equatorial sundials,the planar surface that receives the shadow is exactly perpendicular to the gnomon's style (central bar). This plane is called equatorial,because it is parallel to the equator of the Earth and of the celestial sphere | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Beaucourt, Sebastien / Look At Sciences |
Bildgröße: | 3658 px × 2439 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: |
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