there is no confirmed habitable exoplanet discovered within a close proximity to Earth. The search for potentially habitable exoplanets is an active field of research, and scientists have discovered numerous exoplanets in the habitable zone of their respective star systems. However, determining the habitability of these planets requires further study and characterization.
One of the closest known exoplanet systems to Earth is the Proxima Centauri system, located approximately 4.24 light-years away from us. Proxima Centauri b is an exoplanet orbiting the red dwarf star Proxima Centauri, and it is within the star's habitable zone. However, the habitability of Proxima Centauri b is still a subject of ongoing investigation.
It's important to note that as technology advances and new discoveries are made, our understanding of nearby exoplanets and their potential habitability will continue to evolve. Future missions and observations may provide more insights and potentially uncover habitable exoplanets that are closer to Earth. Therefore, it's always valuable to stay updated with the latest scientific developments in this field.