cosmological constant

cosmological constant

 
noun Astronomy.
a term introduced by Einstein into his field equations of general relativity to permit a stationary, nonexpanding universe: it has since been abandoned in most models of the universe.

Origin:
1925–30
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Cosmological constant is always a great word to know.
So is Libra. Does it mean:
a zodiacal constellation between Virgo and Serpens also called the Balance
the polestar or North Star, a star of the second magnitude close to the north pole of the heavens, in the constellation Ursa Minor
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WordNet
cosmological constant

noun
an arbitrary constant in the equations of general relativity theory 
WordNet® 3.0, © 2006 by Princeton University.
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