a. Described the motion of planets around the sun as elliptical; Johannes Kepler, Robert Hooke, or Isaac Newton?
b. First proposed the idea that a force of attraction applied to all objects in space; Johannes Kepler, Robert Hooke, or Isaac Newton?
c. Used mathematics to prove that gravity increases with decreasing distance between objects; Johannes Kepler, Robert Hooke, or Isaac Newton?
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a. Described the motion of planets around the sun as elliptical: Johannes Kepler
b. First proposed the idea that a force of attraction applied to all objects in space: Robert Hooke (though this idea was later refined and expanded upon by Isaac Newton)
c. Used mathematics to prove that gravity increases with decreasing distance between objects: Isaac Newton
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