COSMOLOGICALCONSTANT

Cosmological constant

In cosmology, the cosmological constant is the value of the energy density of the vacuum of space. It was introduced by Albert Einstein as an addition to his theory of general relativity to "hold back gravity" and achieve a static universe, which was the accepted view at the time. Einstein abandoned the concept as his "greatest blunder" after Hubble's 1928 discovery that the distant galaxies are expanding away from each other, implying an overall expanding Universe . Surprisingly, the discovery of cosmic acceleration in 1998 has revived the need for a non-zero cosmological constant, this time to add a small acceleration to the ongoing ...

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cosmological constant

Noun

  1. A term added by to his equations of general relativity in order to account for a supposed static universe.


The above text is a snippet from Wiktionary: cosmological constant
and as such is available under the Creative Commons Attribution/Share-Alike License.

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