-
Use Cases
-
Resources
-
Pricing
270 BC
% complete
Aristarchus of Samos determined the Sun was about six to seven times larger than the Earth which led him to the idea of that the Earth actually revolves around the Sun.
150 AD
% complete
Claudius Ptolemy believed the Earth was the center of the universe.
1543 AD
% complete
Copernicus published 'On the Revolutions', just before his death. In it, he proposed that the center of the universe was not the Earth, but the sun. He suggested that the Earth's rotation accounted for the rise and setting of the sun.
1608 AD
% complete
Galileo's observations of the phases of Venus proved Copernicus's heliocentric theory. The telescope he made could magnify objects up to twenty times.
1612 AD
% complete
Johannes Kepler created the first three laws of planetary motion.
1838
% complete
Bessel was the first astronomer to publish the distance between stars and planets.