An astronomer researching the cosmic microwave background.[ref]
John C. Mather (NASA Goddard professional profile). Independent professional identity
Portrait of John C. Mather
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John C. Mather is an American astrophysicist known for his work in the field of cosmology and his significant contributions to our understanding of the universe. He was awarded the Nobel Prize in Physics in 2006, along with George F. Smoot, for their work on the Cosmic Background Explorer Satellite (COBE), which provided critical measurements of the cosmic microwave background radiation.