Seminars Cycles of weekly seminars organized by the Physics Departments of the University of Rome "Tor Vergata" and Sapienza University of Rome, both in the field of astrophysics and in the field of space sciences. Cycles of weekly seminars on astronomy and astrophysics organized by the structures of the National Institute of Astrophysics-INAF most directly involved in the PhD in Astronomy, Astrophysics and Space Science: - Astronomical Observatory of Rome-OAR - Institute of Astrophysics and Space Planetology-IAPS - Astronomical Observatory of Abruzzo-OAAb