Example image of eyePlorer eyePlorer map for 'Cosmic microwave background radiation': Electromagnetic radiation Physical cosmology Universe Optical telescope Radio telescope Microwave Arno Allan Penzias Nobel Prize in Physics Robert Woodrow Wilson Plasma (physics) Thermal radiation Black body Anisotropy Spectral density Planck (spacecraft) Cosmic Background Explorer Isotropy NASA Root mean square Spectrophotometry Exponential growth Inflation (cosmology) Elementary particle Fundamental interaction Symmetry breaking Baryon Electron Photon Thomson scattering Hydrogen Metric expansion of space Proton Decoupling Free streaming Color temperature Comoving distance Observable universe Wilkinson Microwave Anisotropy Probe Lambda-CDM model Hubble's law Shape of the Universe Recessional velocity Redshift George Gamow Ralph Asher Alpher Robert Herman Milky Way Robert H. Dicke Yakov Borisovich Zel'dovich A. G. Doroshkevich