„Tests of Big Bang: The CMB”. Goddard Space Flight Center. jul 2009. Приступљено 24. 9. 2009. „Only with very sensitive instruments, such as COBE and WMAP, can cosmologists detect fluctuations in the cosmic microwave background temperature. By studying these fluctuations, cosmologists can learn about the origin of galaxies and large-scale structures of galaxies, and they can measure the basic parameters of the Big Bang theory.”
„Wilkinson Microwave Anisotropy Probe: Overview”. Goddard Space Flight Center. 4. 8. 2009. Приступљено 24. 9. 2009. „The WMAP (Wilkinson Microwave Anisotropy Probe) mission is designed to determine the geometry, content, and evolution of the universe via a 13 arcminute FWHM resolution full sky map of the temperature anisotropy of the cosmic microwave background radiation.”