c Chapter Di Giacomo, Federico | Zaggia, Simone | Zanini, Valeria From Santini to Gaia : the improvement of the modern astrometric data with the use of XIX century stellar catalogue PDF 2023 - Pisa University Press Is part of Società italiana degli storici della fisica e dell'astronomia : proceedings of the SISFA 42nd Annual Conference : Perugia, 26-29 September 2022, Department of Physics and Geology, University of Perugia