Memory Game Exoplanet AdventureOnline version Explore the universe with these exoplanet-themed memory cards. Match the planets and their features to win! by Andrea Guevara Proxima Centauri b Habitable Zone Super-Earth Proxima Centauri b Gaseous Atmosphere Hot Jupiter Transit Method Trappist-1 Hot Jupiter Kepler-186f Super-Earth Gaseous Atmosphere Transit Method Trappist-1 Kepler-186f Habitable Zone Kepler-186f Super-Earth Gas Giant Transit Method Habitable Zone Habitable Zone Proxima Centauri b Hot Jupiter Hot Jupiter Super-Earth Kepler-186f TRAPPIST-1 Proxima Centauri b Gas Giant TRAPPIST-1 Transit Method