View of an armillary type of equinoctial sundial
Numéro d’image : 11879807
| Sundial. View of an armillary type of equinoctial sundial. The celestial sphere is represented by three metal bands,the thickest of which,the equinoctial hour-ring,lies along the celestial equator. The sundial measures time using the shadow cast by the central metal sphere which represents the Earth. This sphere is on a spike known as a gnomon,here aligned with the polar axis. As the Sun moves across the sky the shadow moves around the equinoctial ring,falling on the appropriate hour. This is the most accurate non- adjustable form of sundial. This sundial is in Holland Park,London,England | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Bond, Martin |
| Taille de l’image : | 2867 px × 3573 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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