This graphic illustrates the evolution of satellites designed to measure ancient light leftover from the big bang that created our universe 13.8 billion years ago; NASA COBE Explorer left and WMAP middle, and ESA Planck right.
This graphic illustrates the evolution of satellites designed to measure ancient light leftover from the big bang that created our universe 13.8 billion years ago; NASA COBE Explorer left and WMAP middle, and ESA Planck right.