Etymology:
Meaning:
Origin:
The practice of celestial navigation has its origins in ancient times. Sailors have always needed to know their location at sea to chart a course and avoid hazards. Early methods of celestial navigation used simple observations of the sun and stars to estimate latitude (distance north or south of the equator).
Over time, celestial navigation became more sophisticated. The invention of the astrolabe in the 9th century AD allowed sailors to measure the angles between celestial objects more accurately. In the 15th century, Portuguese explorers like Vasco da Gama developed the use of celestial navigation to sail along unknown coastlines.
The invention of the sextant in the 18th century revolutionized celestial navigation. The sextant allowed sailors to measure angles between celestial objects and the horizon with much greater precision. Celestial navigation using the sextant remained the primary method of navigation at sea until the late 20th century, when satellite-based navigation systems became available.
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