astronomical instruments 2 [vynechat] astronomické prístroje 2 [vynechat] astronomers 1 [vynechat] astronomical observations 1 [vynechat] astronomické pozorovania 1 [vynechat] astronómovia 1 [vynechat] dejiny astronómie 1 [vynechat] dejiny geodezie 1 [vynechat] geodetical instruments 1 [vynechat] geodetické prístroje 1 [vynechat] history of astronomy 1 [vynechat] history of geodesy 1 [vynechat] hvezdárne 1 [vynechat] observatories 1 [vynechat]