The Earth is not the center of the universe

Considered to be the 1st scientist

Developed what is now known as Physics

Depended on actual observations and rational thinking to form an explanation of the universe

Divided the universe into 2 domains: the heavenly domain and the earthly realm

Heavenly domain: complicated system of 56 interconnecting spherical shells, each of which derived its movement from the other shells linked to it

Earthly realm: composed of earth, air, fire and water, which interacted together to form all of the natural world

Used mathematical relationships to connect the observations of their study together to draw conclusions

Tried to determine accurate positions of planets(Astronomy)

Tried to form a true image of the cosmos(Cosmology)

Wrote a book known as ''Almagest'' which is a treatise on his mathematical astronomy

Developed the planetary theory

Developed what would become known as the scientific method

Because observation was being supported by a mathematical system and the two methods helped to verify one another

Musical theory and ancient astrological ideas still played an important role in describing a complete cosmology

Believed that the whole universe is made of 8 shells with no room or space in between

First to mention that the universe was heliocentric

Published his book in the year of his death(1543)