Exploring the variety of small planets with HARPS-N

To understand exoplanetary systems, we can study their mass-radius relationship or lack thereof. Kepler, K2, and TESS discover thousands of exoplanet candidates providing precise transit photometry which are then followed up by ground-based spectroscopy to characterise their masses and internal composition. The expertise gained from this process will be invaluable for the PLATO mission when pushing to longer-period small planets. In this poster, I give an overview of the HARPS-N Collaboration's leading efforts to fill and interpret the mass-radius diagram of small planets.