pješačenje logičan pokraj astronomical instrument from hellenistic world metan argument ispravan
Alexandria observatory, 2nd century BC - 2nd century AD. Astronomer using a pre-telescopic sighting instrument, possibly a cross-staff. In Ptolemaic Egypt, the Egyptian tr - Album alb3800717
Armillary sphere - Wikipedia
Astrolabe - Wikipedia
File:Ancient Astronomical Instruments on the Wall of Peking.jpg - Wikimedia Commons