In attempting to make sense of the earth's motion, particularly its position in the space (regardless the significance of the term at the time), people have spent uncalculated amount of efforts to make observations throughout the history. The major ancient Greek philosophers Plato and Aristotle, populated their worldview based on subjective insights, but falling short of progressive scientific demands. The gradual emerging from Ptolemy's geocentric theory (100-170), to Tycho's circular geocentric orbits (1546-1601) to Copernicus heliocentric model (1473-1543) signified such changes. All three ...

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• Grade Level: Undergraduate