Changes

Einstein then wrote a series of papers applying relativity to gravity using the mathematics of [[Riemannian Geometry]], resulting in [[General Relativity]]. Much of the actual mathematics of general relativity was worked out by Marcel Grossman, David Hilbert, and others. Einstein's main contribution was to give an alternate derivation of the field equations, and to apply them to explain an anomaly in the advance of the perihelion in Mercury's orbit.

Einstein then wrote a series of papers applying relativity to gravity using the mathematics of [[Riemannian Geometry]], resulting in [[General Relativity]]. Much of the actual mathematics of general relativity was worked out by Marcel Grossman, David Hilbert, and others. Einstein's main contribution was to give an alternate derivation of the field equations, and to apply them to explain an anomaly in the advance of the perihelion in Mercury's orbit.

[[Arthur Eddington]] popularized General Relativity by publishing an explanation of it and by attempting to prove the theory experimentally in a dramatic test.  Eddington embarked on a highly publicized trip into the Atlantic Ocean off Africa in order to observe the bending of [[star]]light passing nearby the [[Sun]] during the total [[solar eclipse]] of May 29, 1919.  Eddington returned with a declaration that he had proven Einstein's theory of [[General Relativity]], making Einstein extremely famous, when in fact he had selectively used data to attain this result.  Eddington was passed over for the Nobel Prize.

[[Arthur Eddington]] popularized General Relativity by publishing an explanation of it and by attempting to prove the theory experimentally in a dramatic test.  Eddington embarked on a highly publicized trip into the Atlantic Ocean off Africa in order to observe the bending of [[star]]light passing nearby the [[Sun]] during the total [[solar eclipse]] of May 29, 1919.  Eddington returned with a declaration that he had proven Einstein's theory of [[General Relativity]], making Einstein extremely famous, when in fact he had selectively used data to attain this result.  No Nobel Prize was given for relativity.

==Cosmological Constant==

==Cosmological Constant==

Einstein revised his work on [[General Relativity]] to include a '[[fudge-factor]]' which he termed the [[Cosmological Constant]]. He was trying to account for the apparent steady-state nature of the universe.

Einstein revised his work on [[General Relativity]] to include a '[[fudge-factor]]' which he termed the [[Cosmological Constant]]. He was trying to account for the apparent steady-state nature of the universe.