Our Universe is a mysterious place and quite often scientists get confused about what is actually happening in it. Dealing with data that has travelled billions of light years is no easy task and each method of data processing leads to a different conclusion. This is what has happened with a group of Astronomers at the University of Arizona.
The scientists used supernovae, remnants of exploded stars, as a reference to measure the expansion of the universe. Their results are very different from what was expected, the rate of the expansion of the universe is much slower than previously believed.