COBE:
NASA's COBE (Cosmic Bakground Explorer) satellite was developed to measure the diffuxe infrared and cosmic microwave background radiation from the early Universe to the limits set by our astrophysical environment. COBE was launched on November 18, 1989 and carried three instruments: DIRBE (the Diffuse InfraRed Experiment) to search for and measure the cosmic infrared background radiation, DMR (Differential Microwave Radiometers) to map the cosmic microwave background radiation precisely, and FIRAS (Far-InfaRed Absolute Spectrophotometer) to compare the spectrum of the cosmic microwave background radiation with that from a precise blackbody.
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