Exoplanets, or extrasolar planets, are planets that exist outside our solar system, orbiting stars other than the Sun. They come in various sizes and compositions, ranging from gas giants like Jupiter to rocky planets similar to Earth. The discovery of exoplanets has expanded our understanding of the universe and the potential for life beyond our planet. The study of exoplanets involves various methods, including the transit method, where astronomers observe the dimming of a star's light as a planet passes in front of it. This research not only helps identify new worlds but also provides insights into their atmospheres and potential habitability.