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[[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 [[finding]]s showed conclusively that the [[universe]] was indeed [[expand]]ing, as predicted by certain solutions of GR's field equations in the absence of a cosmological constant.  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 [[finding]]s showed conclusively that the [[universe]] was indeed [[expand]]ing, as predicted by certain solutions of GR's field equations in the absence of a cosmological constant.  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 Cosmological Constant, <nowiki>"It was the biggest blunder of my life."</nowiki>

He later said of his Cosmological Constant, "It was the biggest blunder of my life."

An interesting end-note on this term: Principle investigators from Princeton first published findings in 1998 apparently revealing an [[accelerating]] expansion for the universe<ref>http://map.gsfc.nasa.gov/m_mm.html</ref>. Because this initially seemed like it might be a sort of "anti-gravity" factor (similar in concept to Einstein's original notion), it briefly became quite popular for scientists to dub it the 'Cosmological Constant' as well.

An interesting end-note on this term: Principle investigators from Princeton first published findings in 1998 apparently revealing an [[accelerating]] expansion for the universe<ref>http://map.gsfc.nasa.gov/m_mm.html</ref>. Because this initially seemed like it might be a sort of 'anti-gravity' factor (similar in concept to Einstein's original notion), it briefly became quite popular for scientists to dub it the 'Cosmological Constant' as well.

Subsequent observations and further analysis have revealed that not only were the initial [[WMAP]] findings correct, but that the effect arises rather from a much deeper and more fundamental characteristic of the fabric of space-time itself.  For more information, see: [[Dark Energy]].

Subsequent observations and further analysis have revealed that not only were the initial [[WMAP]] findings correct, but that the effect arises rather from a much deeper and more fundamental characteristic of the fabric of space-time itself.  For more information, see: [[Dark Energy]].