Which of Darwin's sons became a notable astronomer?

George Darwin was the son of Charles Darwin who became a notable astronomer and mathematician. Born in 1845, he developed an influential scientific career separate from his father’s work on evolution.

George Darwin studied mathematics at the University of Cambridge and became a Fellow of Trinity College. His research focused especially on astronomy, celestial mechanics, and the effects of tides. He investigated how the gravitational interaction between Earth and the Moon might have influenced the Moon’s origin and the changing length of Earth’s day.

His tidal-evolution theory proposed that the Moon may have separated from a rapidly spinning early Earth, an idea later associated with the Pacific Ocean basin. Although modern evidence does not support that explanation as the Moon’s actual origin, George’s mathematical treatment of tides was important in the development of theoretical astronomy.

George Darwin was elected a Fellow of the Royal Society in 1879 and received the society’s Copley Medal in 1911. He should not be confused with his brothers Francis Darwin, a botanist, or Horace Darwin, an engineer and civic figure.