Research activity is divided into research projects that currently follow six thematic lines of investigation, and that cover most fields (theoretical, observational, and instrumental) of astrophysics. The present lines of research at the IAC include: The Structure of the Universe and Cosmology, The Local Universe, Stellar Physics, Planetary Systems and the Interstellar Medium, The Sun and the Solar System, and Instrumentation and Space. Each project is directed and managed by a Principal Investigator (PI), and formally unites the work of pre- and postdoctoral researchers.