Gravitation and General Relativity
What is gravity, the term we're all used to? what do we know about it, and what remains unknown? How did Einstein make huge contributions to this field? What does Relativity talk about? Find out the answers to all these questions here, in this article. History of gravity This is where Kepler presented his first two laws. credits: http://www.sothebys.com/ So there was this Danish nobleman and astronomer, named Tycho Brahe. He made a lot of pretty accurate observations (considering the epoch and the limited technology available during that time) regarding the positions of planets and their orbits. He had this student named Johannes Kepler, who would later become very famous by the laws named "Kepler's planetary laws". He presented three laws, concerning the speed and positions of planets in the solar system, based on Tycho Brahe's observations. Then came our lovely old friend - Sir Isaac Newton. Using Kepler's laws, observations, and of course his int