Mass radius diagram and isocomposition curves calculated with BICEPS (solid lines) or taken from Zeng et al. (2019; dashed lines). The boundary conditions are set as in Zeng et al. (2019) to 300 K and 1 mbar. The Earth like composition corresponds to a two layer structure of 32.5 wt% of Fe and 67.5 wt% of MgSiO₃. The data for the background exoplanets were taken from the NASA Exoplanet Archive (downloaded the 17.02.2022). Bottom panel: Relative difference between the shown isocomposition curves in the top panel.