-
200
Ptolemy
Ptolemy thought that the earth was the in the center of the solar system and all the other planets revolved around it. -
Jan 18, 1473
Nicholas Copernicus
Nicholas Copernicus thought that the sun was at rest and he assumed the earth had to be in motion. Also that the remaining planets fell into the ssame ordely orbit -
Jan 18, 1550
Johannes Kepler
Johannes Kepler discovered that the orbits of the planets are ellipse and the sun is in the center of it. -
Jan 13, 1564
Galileo Galilei
Galileo Galilei explained that to see the sky through the telescope you had to look up. He also thought the Earth was a sphere and he improved the telescope. -
Sir Isaac Newton
Sir Isaac Newton explained that the center of mass of a body either reamins in rest or movesin the same speed in a straight line.
