Cosmological values

Does the cosmological constant have a value?
The numerical value of the cosmological constant is calculated using a recently suggested cosmological model and found to be Λ=2.036\xd710−35 s−2.
This value of Λ is in excellent agreement with the measurements recently obtained by the High-Z Supernova Team and the Supernova Cosmology Project..
A positive vacuum energy density resulting from a cosmological constant implies a negative pressure, and vice versa.
If the energy density is positive, the associated negative pressure will drive an accelerated expansion of the universe, as observed. (See Dark energy and Cosmic inflation for details.)

In cosmology, the cosmological constant alternatively called Einstein's cosmological constant, is the constant coefficient of a term that Albert Einstein EquationPositive valuePredictionsReferences

That changed with the discovery in 1998 that the expansion of the universe is accelerating, implying that the cosmological constant may have a positive value.EquationPositive valuePredictionsReferences

Cosmological values

Does the cosmological constant have a value?