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jul 19, 201 BC - Astrolabe

Description:

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

Added to timeline:

Social Studies: Chapter 3: Exploration and Technology

ByTaylor Petersen
11 Oct 2018
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Date:

jul 19, 201 BC
Now
~ 2228 years ago

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