In a paper, led by a Danish team and released this week, the many new theories that have been proposed to explain the acceleration of the universe are critically assessed in the face of new data. Dr. Jesper Sollerman and Dr. Tamara Davis lead the team who show that despite the increased sophistication in cosmological models over the last century the best model to explain the acceleration remains one that was proposed by Einstein back in 1917.
Although Einstein's reasoning at the time was flawed - he proposed the modification to his theory of general relativity so it could support a static universe, because in those days everyone 'knew' the universe was not expanding. It may be that he was right all along.
Read the full Spaceflight Now story here.