I added a NASA exoplanet library to ExoSim. I built a new library using real data for Kepler-10 b, Kepler-186 f, and Kepler-20 e. Each card shows the planet radius, star radius, orbital period, discovery year, and a link to its NASA Exoplanet Archive source. I also connected the presets to the actual simulator. Loading a planet now updates the 3D star and planet sizes, transit depth, light curve, target name, and live science calculations together. Comparing the systems is interesting—Kepler-186 f creates a much deeper dip because its host star is considerably smaller.