A new Zealand Team have just published a paper that states there models do not require dark energy?
Dark energy is usually assumed to form roughly 70% of the present material content of the Universe. However, this mysterious quantity is essentially a place-holder for unknown physics.
The Dark Side of Astrophysics
The accelerating expansion of the Universe may not be real, but could just be an apparent effect, according to new research published in the journal Monthly Notices of the Royal Astronomical Society. The new study—by a group at the University of Canterbury in Christchurch, New Zealand—finds the fit of Type Ia supernovae to a model universe with no dark energy to be very slightly better than the fit to the standard dark energy model.
http://www.ras.org.uk/news-and-press/3046-new-supernova-analysis-reframes-dark-energy-debate
