After leaving the Royal Society he took up writing, and during a long career, he was an author produced over forty books, mainly on astronomy, and the history and philosophy of science.
[4] He went on to be Historical Section Director from 1953 to 1965, Journal Editor from 1965 to 1985, and President from 1989 to 1991, during which time the association celebrated its centenary.
Notable and hilarious, the interplay between Ronan's sober and intellectual analysis along with Moore's more extravagant character led frequent disagreements that were usually solved over several bottles of red wine.
The weekends were an enormous success and made a valuable and irreplaceable contribution to the amateur astronomical scene.
Among his many books on the history of science were studies of scientists such as Galileo, William Herschel and Edmond Halley.