==Awards and honors==* Awarded the Bruce Medal (1963)* The Asteroid 1831 Nicholson, the crater Nicholson on the Moon, the crater Nicholson on Mars, and Nicholson Regio on Ganymede were named after him.
Od leta 1943 do 1955 je bil urednik revije "Publications of the Astronomical Society of the Pacific" in dvakrat tudi predsednik Tihomorskega astronomskega društva (ASP).