Who is credited for starting the discussions on the shape of planetary orbits?
A
Claudius Ptolemy
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B
Johannes Kepler
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C
Edwin Hubble
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D
Galileo Galilei
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Solution
The correct option is B Johannes Kepler Johannes Kepler, a German astronomer, was the first person who began discussing the shape of planetary orbits. Kepler's laws are used to study the motion of heavenly bodies in universe.