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. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Williamson, Mark |
Bildgröße: | 3408 px × 5128 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |