One of several historical Chinese astronomical instruments on the roof of the Beijing Ancient Observatory in Beijing, China, an astronomical observatory that dates from the 1400s. The equatorial armilla (1673), or armillary sphere, was designed to measure true solar time and right ascension and declination of celestial objects. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Williamson, Mark |
Taille de l’image : | 3408 px × 5128 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |