Theoretical estimates of the temperature of this phenomenon were undertaken by Robert Herman and Robert Dicke, but Andrew McKellar was its first observer, having noted a typical bolometric temperature of the interstellar medium in his search for interstellar absorption lines.
Theoretical estimates of the temperature of this phenomenon were undertaken by Robert Herman and Robert Dicke, but Andrew McKellar was its first observer, having noted a typical bolometric temperature of the interstellar medium in his search for interstellar absorption lines. This phenomenon and galactic emission lines were observed by a polarizing Michelson interferometer called FIRAS. The "yin-yang" pattern in this phenomenon results from the sun's orbital motion. A primary source of its large-scale anisotropy is due to time-dependent density perturbations, which cause gravitational redshift, specifically the Integrated Sachs-Wolfe Effect, the angular scale of which suggests a flat universe. Its perceived source is called the surface of last scattering.  Inverse Compton Scattering of this phenomenon is also called the Sunyaev-Zel'dovich Effect. It was discovered by Penzias and Wilson and studied by COBE [CO-bee] and WMAP.  For 10 points, name this nearly uniform, 2.8-Kelvin radiation source.
Theoretical estimates of the temperature of this phenomenon were undertaken by Robert Herman and Robert Dicke, but Andrew McKellar was its first observer, having noted a typical bolometric temperature of the interstellar medium in his search for interstellar absorption lines.
Cosmic Microwave Background Radiation [or relic radiation]