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19 jul 201 año aC - Astrolabe

Descripción:

An instrument for observing the positions of heavenly bodies (stars) that was used before the sextant was invented.
Invented in 200 BC
Invented by Greek astronomer, Hipparchus

Añadido al timeline:

Social Studies: Chapter 3: Exploration and Technology

ByTaylor Petersen
11 oct 2018
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fecha:

19 jul 201 año aC
Ahora mismo
~ 2228 years ago

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