An international team of astronomers led by Dr Sebastien Muller of the Chalmers University of Technology has made the most precise measurement ever of how the Universe has cooled down during its 13.77-billion-year history. Thanks to cold gas clouds in a distant galaxy and radio waves from a quasar known as PKS 1830-211 behind it – the red point in the middle of the picture, astronomers have measured the temperature of the Universe 7.2 billion...
