Astronomers have long scanned the stars for signs of worlds beyond our own, and the discovery of HD 137010 b is a landmark achievement in that quest. This book provides details on the discovery and scientific significance of HD 137010 b, an Earth-sized exoplanet located 146 light-years away, identified through data from NASA’s Kepler space telescope. It traces the history of exoplanet detection methods, looking into the specifics of the Kepler mission’s extended operations, and explores the identification process involving citizen scientists and international research teams. Subsequent chapters analyze the host star’s properties, the planet’s orbital and physical characteristics, habitability assessments, environmental conditions, and prospects for future observations with advanced telescopes. Drawing on peer-reviewed research and expert insights, the book uses astronomical data to evaluate the planet’s potential for liquid water and life, despite its estimated surface temperatures comparable to those on Mars.