Ewell Astronomical Society produces a monthly newsletter entitled Janus (A Roman god and a moon of Saturn discovered in 1966).

Janus has been the society’s newsletter since 1966, but in recent years reverted to being an online publication due to lack of uptake. In 2017 however, Janus was brought back into print and was restored to its former glory as a cornerstone of the society, and as a primary means of communicating with our members.