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340 BCE
Aristole.earth is in the middle of the solar system
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200 BCE
aristarchus. idea of the sun being in the middle of the solar system
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150 BCE
Ptolemy.suggests the idea of epicycles on how the planets move.
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1543
copernicus. suggests the sun is in the centre of the solar system
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Galileo. made advencements in the telescope
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Kepler.He suggests three laws of planetary motion and that orbits are ellipses and not circles.
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Isaac neewton.Suggested the idea of planetary gravity.
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William Herschel .Discovered Uranus
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Edwin Hubble. the universe is expanding