The value of the cosmological constant

We make the cosmological constant, Lambda, into a field and restrict the variations of the action with respect to it by causality. This creates an additional Einstein constraint equation. It restricts the solutions of the standard Einstein equations and is the requirement that the cosmological wave function possess a classical limit. When applied to the Friedmann metric it requires that the cosmological constant measured today, t(U), be Lambda similar to t(U)(-2) similar to 10(-122), as observed. This is the classical value of Lambda that dominates the wave function of the universe. Our new field equation determines Lambda in terms of other astronomically measurable quantities. Specifically, it predicts that the spatial curvature parameter of the universe is Omega(k0) equivalent to -k/a(0)(2)H(2) = -0.0055, which will be tested by Planck Satellite data. Our theory also creates a new picture of self-consistent quantum cosmological history.