On Friday 16 December, Prof. Francesco Berrilli of the Physics Department of the University of Rome "Tor Vergata", as an expert in solar physics, held a conference at the Accademia Nazionale dei Lincei "Sun, Galileo and the solar (in)constant".

Among the key topics of the conference was the magnetically active Sun and how Galileo's observations started the study of our star as a variable object on time scales much shorter than the evolutionary ones linked to the fusion reactions that take place in its nucleus.

An interesting journey that has brought the audience from the past to the present day, trying to keep the curiosity about the functioning mechanisms of our main star, the Sun, alive and accessible even to non-experts.