Navigating by the stars. 16th-century artwork of a cross-staff being used to determine the altitude of the northern pole star (Polaris,labelled 'norte' at upper right) above the horizon (labelled 'orizonte' at bottom right). This was a standard measurement obtained by mariners and travellers to aid navigation. Artwork from 'Regimiento de navegacion' (Seville,1563) by Spanish astronomer and geographer Pedro de Medina (1493-1567) | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / British Library |
Taille de l’image : | 4045 px × 4374 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |