Occum's Ghost:
The parameter used to "discover" dark energy is simply a term placed in parallel with the term for spacetime in the FRW solution for Hubble's Universe. Using fairly recent supernova type Ia data, Hartnett and coworkers have found solutions of a more specialized nature to the FRW fit the data best without dark energy or matter. You may read the abstracts for free at the "Foundations of Physics Letters" and at "Foundations of Physics" journals. Using the most recent and best data set yet of 192 SNe Ia Smith and Oztas have fit the data with the FRW model and find serious discontinuities. Serious because this means either the FRW model including dark energy is useless or that the Universe will simply cease to exist in the future. This may be found for free at
http://www.m-hikari.com/astp/forth/s...TP1-4-2008.pdf
notice Fig. 1. One suspects th Universe shall continue and the FRW model which includes dark energy should simply be tossed.
Cheers,
Mike