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What is parallax? History of astronomy

By |2018-04-23T14:09:48+00:00July 18th, 2017|Greeks, Science|

Parallax and your finger Parallax comes from the Greek word "para", meaning "alternate" and "alla", meaning "change". Greek people used the word parallax to describe how an object seems to move when you look at it from two different places. The easiest way to see parallax in action is to hold out your left arm [...]

Ancient Greek astronomy

By |2018-04-23T14:17:22+00:00July 18th, 2017|Greeks, Science|

Eclipse of the sun The art of astrology, the study of the stars in order to predict future events, and to interpret people's characters, was already very advanced before the Greeks began to interest themselves in the stars. The Egyptians and especially the Mesopotamians had done a lot of scientific observations and had named the constellations of stars, and [...]