In 1975 , he was awarded both the Eddington Medal and the Pius XI Gold Medal , and in 1976 the Dannie Heineman Prize , the Maxwell Prize and the Hughes Medal .
[ 82 ] In 1975 , he was awarded both the Eddington Medal and the Pius XI Gold Medal , and in 1976 the Dannie Heineman Prize , theMaxwell Prize and the Hughes Medal .