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Ptolemy: was an astronamor from 85-165 A.D, he formed the geocentric theory. this states that the earth was at the center of the universe and all the other planets cricled it.

Copernicus: was an astronamor lived from 1473-1543 he also belived in the geocentric theory, then he changed to the heliocentric theory which stated the distans of the planets from the sun bore on the size

NASA: sends people/astronots into space for missons to discover the wonders of space

Galileo: lived from 1564-1642 he inventid the telescope and supported the geocentric theory

aristole: lived from 322-384 BC

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