James E. Gunn (astronomer)

James E. Gunn is an American astronomer renowned for his contributions to understanding the universe, particularly in cosmology and the study of galaxies. He played a key role in developing the Sloan Digital Sky Survey, which maps large portions of the sky to gather data on stars, galaxies, and celestial objects. Gunn's work has significantly enhanced our knowledge of the universe's structure and evolution, including insights into dark matter and the formation of galaxies. His research has had a profound impact on modern astrophysics and continues to influence the field today.