Mass–radius diagram for planets with masses Mp < 20 M⊕ and radii Rp < 3.5 R⊕ queried from the NASA Exoplanet Archive. The gray level scales linearly with the relative uncertainties (with equal weight for both mass and radius). GJ1132b is shown in red, and blue circles show Earth and Venus. Curves are for the mass–radiusrelations predicted with theoretical models (Zeng & Sasselov 2013).
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