Dear Graybeard and friends,
Now let us compare betweenthe conventional (non-ether based) general relativity and the vacuum medium - based general relativity which was the improved one (and I have called it as “Completed Einstein general relativity”, CGTR). Actually, both of them are nearly equivalent, except that the vacuum medium - based theory included the cosmological constant!
While the non-ether based theory has zero value ofcosmological constant because it was based on empty space, but the vacuum medium - based one has a definite value of mass density having the same order as the critical mass density. (Please see detail calculation in CGTR). In one view we can treat the cosmological constant as ambient mass filled empty vacuum space, and actually this ambient mass is the mass density of our vacuum medium! But why?
Two reasons which support that our vacuum medium IS the ambient mass of the cosmological constant term. First, both of them have approximately the same mass density; the second reason is thatvacuum medium has a negative pressure which was required to be the solution of the full field equation of conventional general relativity (used for calculating the critical mass density)!
Up to now we could see that actuallyour vacuum medium, cosmological constant has the same property as the requirement of the dark energy. It is very interest that this correspond to the idea of Frank Wilczekwhich has said in his recent book - “The Lightness of Being (Mass, Ether, and the Unification of forces)”!
In the next post we will make a conclusion that vacuum medium, cosmological constant is the same thing as the dark energy.
Sincerely,
Nimit
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www.vacuum-mechanics.com


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