Astrolabe (jan 1, 1050 – jan 1, 2020)
Description:
1. Elaborate inclinometer2. Used to make astronomical measurements
3. Calculates latitude
4. Has a disk with the edge marked in degrees and a pivotal pointer
5. Measures the altitude of celestial bodies
Added to timeline:
Date:
jan 1, 1050
jan 1, 2020
~ 970 years