Proxima b, a planet located near the star Proxima Centauri, has been found to be within its habitable zone, potentially allowing for liquid water if it has an atmosphere. The planet's proximity to its star, however, also exposes it to extreme radiation, which could impact its ability to support life. The discovery of Proxima b is part of a larger effort to identify exoplanets that could potentially harbor life, with thousands of exoplanets already found and many more targets being identified.