(born June 24, 1915, Bingley, Yorkshire, Eng.—died Aug. 20, 2001, Bournemouth, Dorset) British mathematician and astronomer. He was educated at the University of Cambridge, where he became a lecturer in 1945. Within the framework of Albert Einstein's theory of relativity, Hoyle formulated a mathematical basis for the steady-state theory of the universe, making the expansion of the universe and the creation of matter interdependent. Controversy about the theory grew in the late 1950s and early '60s. New observations of distant galaxies and other phenomena supported the big-bang model and weakened the steady-state theory, which has since generally fallen out of favour. Though forced to alter some of his conclusions, Hoyle persistently tried to make his theory consistent with new evidence. He is known also for his popular science works and fiction.

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