Stellar Systems Group

The Stellar Systems Group (SSG) was created in 1988. Its members are mainly dedicated to the study of large stellar structures, stellar clusters and star formation via observations of resolved stellar populations in the Local Group. As concerns methodology, we focus on developing data bases - for example on Galactic O star and the Galactic Centre, exploiting massive data - such as the Gaia and J-PAS surveys, image analysis techniques for high angular resolution, and machine learning. Our group’s success is highlighted by its high scientific productivity, the large number of PhD thesis developed, and the fact that since the beginning of the Ramón y Cajal programme five (six in September 2025) Ramón y Cajal researchers have incorporated themselves into our group.