Part 6/8:
Initial models suggest that TRAPPIST-1e could transition to a carbon dioxide-dominated atmosphere post-solidification, with some potential for supporting life if subsequent conditions are right. They speculate that TRAPPIST-1e could also maintain significant secondary atmospheres even after potential initial hydrogen atmospheres have been stripped away.
On the contrary, TRAPPIST-1b, which orbits closer to the star, appears less likely to retain a habitable atmosphere due to severe atmospheric stripping that leaves only a thin oxygen presence—far from ideal for supporting life.