(a) H₂O cloud (left column) and CO₂ cloud (right column) coverage for OHZ “edge cases” around the Sun where pCO₂ = 7.5 bar. The top row indicates the minimum insolation that converges to a potentially habitable planet in these conditions. The bottom row shows the slightly lower insolation where the planet continues to cool over time ultimately becoming frozen. (b) H₂O cloud (left column) and CO₂ cloud (right column) coverage for OHZ edge cases around TRAPPIST-1 where pCO₂ = 10 bar. The top row indicates the minimum insolation value that results in a potentially habitable planet whose liquid H₂O fraction = 100%. The bottom row shows a lower insolation value where the planet is frozen.