In the late 1990s, physicists, to his horror, found that the expansion of the universe is not slowing down and speeding up. Nothing in the standard model of cosmology, could not explain it, and so invented a new term to describe what drives the acceleration: dark energy. We have no idea what the dark energy, but if it exists, should be around 70% of the energy of the entire universe.
It would be unheard of to request to add an additional component of such a plan in the standard cosmological model. Therefore, another explanation is that we are using the wrong equation – the wrong theory of gravity – to explain the expansion rate of the universe. Perhaps if we describe them with other equations, we would not have to cram a huge amount of extra energy. Alternative gravity could solve the problem of dark energy. Read the rest of this entry »