On Thursday, October 3, 2019, at 4 pm, the “Conversi” Lecture Hall at the Sapienza Department of Physics will host the fifteenth and final lesson of the “Enrico Fermi” Chair 2018-19 by Giovanna Tinetti, Professor of Astrophysics at the University College of London. Prof. Tinetti will address the recent discovery of water on K2-18b, a potentially inhabitable planet that is eight times heavier than Earth