Robert S. (Robert Stawell) Ball

Born in Dublin on July 1, 1840, Sir Robert Stawell Ball became one of the best-known scientific writers of his time. He studied at Trinity College Dublin, worked for Lord Rosse at Birr Castle, and later held major academic posts in Dublin and Cambridge.

Ball served as Royal Astronomer of Ireland and director of Dunsink Observatory before moving to Cambridge as Lowndean Professor of Astronomy and Geometry. Alongside his research, he became especially famous for explaining astronomy in a way general readers could enjoy, with books such as The Story of the Heavens helping to introduce many people to the subject.

He is also remembered for his mathematical work, especially the development of screw theory in rigid body motion. Ball died on November 25, 1913, but his combination of deep learning and clear, enthusiastic writing kept his name alive long after his lifetime.