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Period: 276 BCE to 194 BCE
Eratosthenes
Discovered the earth was round on june 19, 240 B.C -
Period: 100 to 170
Cladious
He believed that the earth was at the center if the universe. he made this discovery in the 2nd century. -
Period: Feb 19, 1473 to May 24, 1543
Nicolaus
he discovered his own celestial model of a heliocentric planetary system Around 1514. -
Period: Jun 20, 1546 to
Tycho
It hard to say when tycho discovered his theory of " The Tychonic system" but it could have been around the time before his passing. -
Period: Dec 27, 1571 to
kepler
By using the data that tycho had kepler discovered planets move on an ellipse. discovery was made in 1609 -
Period: to
Newton
He discovered his theory of gravity in 1687 -
Period: to
einstein
he discovered his theory of general relativity in 1915