Exoplanet Research Uncovers Extreme Heat Trapping and Possible Life‑Supporting Mechanisms

Scientists using the James Webb Space Telescope and advanced computer models have shown that clouds composed of vaporized rocks and salts on sub‑Neptune planets can trap heat so efficiently that temperatures near the atmosphere‑interior boundary rise by more than 1,000 °C, potentially melting the rocky surface into vast magma oceans. The study of planets such as GJ 1214 b and TOI‑1231 b suggests that these molten layers could release gases like oxygen and silicon compounds, altering the observable atmospheric composition.

Separate laboratory experiments simulating the interior of the tidally locked exoplanet LHS 3844 b indicate that a steady mantle circulation can transport heat from the permanently illuminated side to the dark side, creating a stable thermal engine. This process may moderate extreme surface temperatures and could allow life to persist in localized regions despite day‑side temperatures of 1,000‑2,000 K and night‑side conditions approaching absolute zero. The findings challenge assumptions that such planets are wholly inhospitable and highlight the diversity of thermal dynamics on worlds beyond the Solar System.