Knowra Circumnavigation Circumnavigation Circumnavigation is travel that completes a continuous circuit around a planet or other body, returning to the starting region or crossing a chosen boundary.
Magellan expedition : A Spanish-led expedition that completed the first documented circumnavigation of Earth between 1519 and 1522. Its surviving ship completed the first recorded voyage around Earth.
Great circle : A circle on a sphere whose plane passes through the sphere's center, giving the shortest surface route between two points. Great-circle paths explain why efficient global routes appear curved on flat maps.
Age of Discovery : The period of overseas exploration by European powers from the fifteenth through seventeenth centuries. The first circumnavigations arose amid this expansion of oceanic exploration.
Globalization : The growth of connections and interdependence among societies through trade, migration, communication, and cultural exchange. Circumnavigation helped establish durable sea links between distant regions.
Transatlantic crossing : A journey across the Atlantic Ocean between the Americas, Europe, or Africa. Crossing one ocean is a major voyage but does not by itself encircle Earth.
Francis Drake's circumnavigation : The 1577–1580 voyage led by Francis Drake, the second successful circumnavigation of Earth. Drake's voyage demonstrated that the route was repeatable and brought England major geopolitical gains.
Antimeridian : The meridian at 180 degrees longitude, opposite the prime meridian, where the calendar date changes. Crossing it exposes the datekeeping problem created by traveling around Earth.
Treaty of Tordesillas : A 1494 agreement between Spain and Portugal dividing claims to newly encountered lands outside Europe. Its division sharpened Iberian competition for routes that could reach Asia by sea.
Pacific Ocean : The largest ocean on Earth, extending between Asia and Australia, the Americas, and Antarctica. The first expedition's crossing of the Pacific revealed its immense scale to European navigators.
Transpolar route : A proposed or traversed route across or near a geographic pole, linking regions on opposite sides of the Arctic or Antarctic. A polar crossing can span longitudes without necessarily completing a circuit.
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