Hydrodynamic Escape of Hot Protoatmospheres During a Star's X-ray and Extreme Ultraviolet Saturation May Limit Rocky Exoplanets to ~1.8 Earth Radii
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Recent observations and analysis of low mass (<10 M ⊕ ), exoplanets have found that rocky planets only have radii up to 1.5-2 R ⊕ . Two general hypotheses exist for the cause of the dichotomy between rocky and gas-enveloped planets (or possible water worlds)... ...
