Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 12 1 2025 06 01 Machine Learning for Exoplanet Detection: A Comparative Analysis using Kepler Data 85 98 1891 10.22128/ijaa.2025.2996.1219 EN Reihaneh Karimi School of Astronomy, Institute for Research in Fundamental Sciences (IPM), P. O. Box 19395-5531, Tehran, Iran 0000-0003-2295-0499 Mahdiyar Mousavi-Sadr School of Astronomy, Institute for Research in Fundamental Sciences (IPM), P. O. Box 19395-5531, Tehran, Iran; Iranian National Observatory (INO), Institute for Research in Fundamental Sciences (IPM), P. O. Box 19568-36613, Tehran, Iran 0000-0002-5170-2534 Mohammad H. Zhoolideh Haghighi Department of Physics, K. N. Toosi University of Technology, P. O. Box 15875-4416, Tehran, Iran; School of Astronomy, Institute for Research in Fundamental Sciences (IPM), P. O. Box 19395-5531 0000-0001-5759-0302 Fatemeh S. Tabatabaei School of Astronomy, Institute for Research in Fundamental Sciences (IPM), P. O. Box 19395-5531, Tehran, Iran 0000-0002-0377-0970 Journal Article 2025 07 20 The discovery of exoplanets has expanded our understanding of planetary systems and opened new avenues for astronomical research. In this study, we present a machine learning (ML) framework for exoplanet identification using a time-series photometric dataset from the Kepler Space Telescope, comprising 3,198 flux measurements across 5,074 stars. We investigate the performance of four supervised classification algorithms, namely Random Forest, k-Nearest Neighbors (KNN), Decision Tree, and Logistic Regression, using a comprehensive set of evaluation metrics such as accuracy, precision, recall, F1-score, Area Under the Receiver Operating Characteristic Curve (AUC-ROC), confusion matrices, and learning curves. Among the models, Random Forest achieves the highest accuracy (99.8\%) and near-perfect F1-scores, demonstrating superior generalization and robustness. KNN also performs strongly, achieving 99.3\% accuracy, while Decision Tree demonstrates moderate performance with 97.1\% accuracy, and Logistic Regression trails behind with the lowest accuracy and generalization at 95.8\%. Notably, the application of the Synthetic Minority Over-sampling Technique (SMOTE) significantly improves performance across all models by addressing class imbalance. These findings underscore the effectiveness of ensemble-based machine learning techniques, particularly Random Forest, in handling large volumes of photometric data for automated exoplanet detection. This approach holds significant potential for implementation at ground-based facilities, such as the Iranian National Observatory (INO), where such extensive and precise datasets can further advance exoplanet discovery and characterization efforts. https://ijaa.du.ac.ir/article_1891_9c9d1180aa16d1b2b801949cffdbbb6b.pdf