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Period: 322 to
Aristotle
Nature of heavy objects to fall and lighter objects to rise. -
Period: to
Al-Biruni
"The attraction of all things towards the center of the earth." -
Period: to
Muhammad Ibn Musa
There was a force of attraction between heavenly bodies. -
Period: to
Al-Khazim
Differented between mass, force, and weight, gravity varies with the distance from the center of the earth. -
Period: to
Copernicus
Geocentric model of the solar system. -
Period: to
Galileo
Found that objects accelerate at the same rate no matter the size. -
Period: to
Issac Newton
Did not discover gravity itself, but discovered that it was universal.