After being awarded his Ph.D. Professor Mather went to work at the Goddard Institute for Space Studies at Columbia University. He started the work on COBE there (1974-1976). More than 1,000 researchers, engineers and other workers made the COBE satellite. John Mather was in control of them all and created the technology for measuring the cosmic radiation. George Smoot had the job of measuring small changes in the temperature of the radiation.