Ensemble ML system (LightGBM, RandomForest, ExtraTrees, AdaBoost, XGBoost and stacking) identifying exoplanet candidates in NASA Kepler, K2 and TESS mission data, with SHAP explainability, probability calibration, adjustable decision thresholds and independent TOI/K2 validation. NASA Space Apps Challenge — winner of the Astana round and Global Nominee. Challenge: "A World Away: Hunting for Exoplanets with AI".