Exoplanet detection refers to the methods used to discover planets outside our solar system, known as exoplanets. Scientists employ various techniques, including the transit method, where they observe the dimming of a star's light as a planet passes in front of it, and the radial velocity method, which measures the star's wobble caused by the gravitational pull of an orbiting planet. These methods have led to the discovery of thousands of exoplanets, expanding our understanding of the universe. Some exoplanets are located in the habitable zone, where conditions may be suitable for liquid water, raising the possibility of extraterrestrial life.