Doyen of professional and amateur astronomy in Ticino, former director of the Specola Solare Ticinese, with 64 years of activity in the Sunspot observations, among the founders and then long-time president of the Società Astronomica Ticinese, Sergio Cortesi is no longer with us. We will miss him very much.
RSI La 2 broadcasted on 22th Feb. 2020 a documentary about the activity of Sergio Cortesi at the Specola.
Sergio Cortesi left us