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Famous Astronomers
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!Astronomer
!Contribution
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|Hipparchus and Ptolemy
|Determined the positions of about 1,000 bright stars, tried to explain the puzzles of astronomy without refuting the commonly believed geocentric model of universe and classified stars by magnitude.
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|Aristarchus
|First known person to propound the heliocentric model of universe
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|Nicolaus Copernicus
|Reitererated the heliocentric model of universe
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|Galileo Galilei
|was the first to use the telescope to observe the sky
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|Johannes Kepler
|suggested the elliptical orbits
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See also: List of astronomers