History (2) Portuguese (2) recherche (1) astronomie (1) histoire (1) Portugal (1) Context (1) Rich people (1) Waves (1) Twentieth century (1) Trust (1) Travel (1) Sun (1) Self-disclosure (1) Sailors (1) Science (1) Scholars (1) Research (1) Polestar (1) Ocean (1) Navigation (1) Nautical astronomy (1) Moon (1) Longitude (1) Licenses (1) Latitude (1) History (1) Historiography (1) Historians of science (1) Face (1)