Proxima Centauri b is an exoplanet located about 4.24 light-years away from Earth, orbiting the star Proxima Centauri, which is the closest known star to our solar system. Discovered in 2016, this planet is roughly the same size as Earth and lies within the star's habitable zone, where conditions might be right for liquid water to exist. Scientists are particularly interested in Proxima Centauri b because it could potentially support life. Its surface temperature and atmosphere are still unknown, but ongoing research aims to learn more about this intriguing world and its possibilities for hosting life beyond our planet.