Cosmologists’ standard model of the universe assumes that the universe expands identically in all directions. A team of researchers at the University College London and Imperial College London proved this theory to be correct by studying the cosmic microwave background (CMB), which is the Big Bang’s remnant radiation. Using the measurements of the CMB taken by the European Space Agency's Planck satellite between 2009 and 2013, which provides information about the polarization of the CMB, they were able to understand in depth about the early universe. With the help of this, they created several spinning and stretching models, and checked for any signs of stretching and cold and hot spots in the CMB, which would indicate how the space is expanding. They compared this data with the real map of the space from the Planck satellite and came to the conclusion that the universe expands in all directions uniformly. "We're very glad that our work vindicates what most cosmologists assume. For now, cosmology is safe," says Daniela Saadeh, the lead author of the study.
Read more in Science Daily.