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21st Century

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Written by:

David S


Date added:

April 3, 2015








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2 / 344


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Aristotle thought that the Earth was stationary and that the sun, the moon, the planets and the stars moved in circular orbits around the earth. Then in the 2nd century ad , Ptolemy made a model which elaborated the theory made by Aristotle. In his model "The earth stood at the center, surrounded by eight spheres that carried the moon, the sun, the stars and the 5 planets known at the time...
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Years and years after all these first theories of how the universe was setup scientist found that all the planets revolve around the sun. This is an example of how was seems so simple now like how the planets work was so complicated to our predecessors, and as for what I think, what we find so complicated right now will be so simple in later decades...
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