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Einstein's initial [[philosophy]] of [[Cosmology]] led him to revise his work on [[General Relativity]] to include a '[[fudge-factor]]' which he termed the [[Cosmological Constant]], and which allowed the [[Steady-State Universe]] model--which Einstein originally accepted--to be accounted for.

Einstein's initial [[philosophy]] of [[Cosmology]] led him to revise his work on [[General Relativity]] to include a '[[fudge-factor]]' which he termed the [[Cosmological Constant]], and which allowed the [[Steady-State Universe]] model--which Einstein originally accepted--to be accounted for.

[[Edwin Hubble]], of whom [[NASA]]'s famous [[Hubble Space Telescope]] is named in honor, later convinced him otherwise.  At one point he had Einstein actually making direct observations alongside him, and Hubble's findings showed conclusively that Einstein's original formulas were correct--namely that the [[universe]] was indeed [[expand]]ing just as [[General Relativity]] predicts.  Einstein recanted his original [[philosophy]], and accepted as true the notion of a changing [[universe]] having a definite [[begin]]ning.

[[Edwin Hubble]], of whom [[NASA]]'s famous [[Hubble Space Telescope]] is named in honor, later convinced him otherwise.  At one point he had Einstein actually making direct [[observation]]s alongside him, and Hubble's findings showed conclusively that Einstein's original formulas were correct--namely that the [[universe]] was indeed [[expand]]ing just as [[General Relativity]] predicts.  Einstein recanted his original [[philosophy]], and accepted as true the notion of a changing [[universe]] having a definite [[begin]]ning.

He later said of his original space-time [[theorem]]'s ill-conceived [[kludge]], <nowiki>"It was the biggest blunder of my life.”</nowiki>

He later said of his original space-time [[theorem]]'s ill-conceived [[kludge]], <nowiki>"It was the biggest blunder of my life.”</nowiki>