Clear explanations of natural written and spoken English The Einstein gravitational eld equations with the added cosmological term are [22]: R − 1 2 g R+ g = T ; (1) where is the cosmological constant, the value of which is supposed to be determined by experiment.

This "dark energy," which is the unknown force accelerating the universe, also appears to be just what is needed to fill the 70% "missing mass" of the universe, namely the mass needed to explain the observed fact that space is very nearly flat (i.e., locally it appears to be almost perfectly rectilinear) [ Click on the arrows to change the translation direction.







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The team who uncovered the accelerating expansion studied Type Ia supernova and gathered values of high redshift (far away) versus low redshift (close by) in order to get a good value for the cosmological constant, or Λ.





The 1998 Report. The word in the example sentence does not match the entry word. One "solution" has been proposed by physicists working in string theory, From the

Clear explanations of natural written and spoken English





Examples of how to use “cosmological constant” in a sentence from the Cambridge Dictionary Labs







English

It was originally introduced by Albert Einstein in 1917 as an addition to his theory of general relativity to achieve a static universe.The cosmological constant is the simplest possible form of dark energy, since it is constant in both space and time.



{{#verifyErrors}} Unfortunately, if one calculates the vacuum energy density from quantum zero-point fluctuations (i.e., when particles pop in and out of existence), the result is a factor of 10 120 higher than the value deduced from astronomical observations.




The cosmological constant problem is used by theists as the prime example of the fine-tuning of the universe that they claim as evidence for God.

who for 30 years have been earnestly seeking a complete and unique "theory of everything" that encompasses all known physical laws. Click on the arrows to change the translation direction. This is called a cosmological constant because the simplest way to see this effect in theory is by a summand to the Einstein-Hilbert action which is proportional to the volume of spacetime, with proportionality factor some “constant” λ \lambda, as in … Idea.



{{#verifyErrors}} These hopes were shattered with the 1998 discovery that the expansion of the universe is accelerating, which implies that the cosmological constant (and the zero-point mass density) must be slightly nonzero. But Einstein’s cosmological constant is back and now in play again (Sawyer 33, Reiss 18). 121-126].

Please choose a part of speech and type your suggestion in the Definition field.not new; having been used in the past by someone elseThank you for suggesting a definition! Cosmological constant definition is - a constant term used in the relativistic equations for gravity to represent a repulsive force which may account in part for the rate of expansion of the universe.





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Dictionary The cosmological constant (, or also indicated by λ) is the value of the energy density of the vacuum of space. Needless to say, such "anthropic" reasoning constitutes a dramatic departure in philosophy from the traditional program of physics (and science in general), and it has sharply divided the physics and astronomy communities (for further discussion on the anthropic principle, see



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The current standard model of particle physics has 25 freely adjustable parameters with an additional parameter, the In physical cosmology, the energy of the cosmological vacuum appears as the Scalar fields that do change in space can be difficult to distinguish from a The evidence is also strong that the mechanism for the acceleration is due to a positive On the other hand, a universe with a large positive General relativity and the discovery of dark energy (repulsive gravity) are taken into account, as well as the In cosmology, the vacuum energy is one possible explanation for the If the background universe also contains a non-vanishing However, the largest part comes from so-called dark energy, which accounts for the







However, cosmologist Don Page, an evangelical Christian, has pointed out that the apparent positive value of the cosmological constant is somewhat inimical to life because its repulsion acts against the gravitational attraction needed to form galaxies.


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