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<blockquote data-quote="SicAudio" data-source="post: 6604799" data-attributes="member: 609136"><p>His general relativity equations predicted a dynamic universe originally expanding &amp;amp; afterwards contracting (collapsing) due to gravity. In order to prevent that &amp;amp; describe the model of a stationary universe Einstein added the cosmological constant in his field equations. After Hubble proved through &quot;redshift&quot; that the distance between galaxies is proportional to the speed with which they are moving away from each other, the universe&#039;s expansion could not doubted, causing Einstein himself to refer to the cosmological constant as the biggest blunder of his career. Despite that, recent studies indicate that a cosmological constant taking certain values does not lead to a static but to a dynamic model of the universe, since the dark energy that the constant represents causes a negative pressure which does more than counterbalance gravity (as Einstein thought), but is responsible for the universe&#039;s accelerated expansion, which is already proven to happen (though until it was, many suggested a cosmological constant equal to zero that suggested a decelerated expansion). So in a way he was both right &amp;amp; wrong.</p></blockquote><p></p>

[QUOTE="SicAudio, post: 6604799, member: 609136"] His general relativity equations predicted a dynamic universe originally expanding & afterwards contracting (collapsing) due to gravity. In order to prevent that & describe the model of a stationary universe Einstein added the cosmological constant in his field equations. After Hubble proved through "redshift" that the distance between galaxies is proportional to the speed with which they are moving away from each other, the universe's expansion could not doubted, causing Einstein himself to refer to the cosmological constant as the biggest blunder of his career. Despite that, recent studies indicate that a cosmological constant taking certain values does not lead to a static but to a dynamic model of the universe, since the dark energy that the constant represents causes a negative pressure which does more than counterbalance gravity (as Einstein thought), but is responsible for the universe's accelerated expansion, which is already proven to happen (though until it was, many suggested a cosmological constant equal to zero that suggested a decelerated expansion). So in a way he was both right & wrong. [/QUOTE]

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