The discovery of new planets in our galaxy continues to be a topic of interest to scientists and astronomers around the world. Using the latest technology, researchers have managed to discover an exoplanet outside our solar system, adding to the list of planets that could possibly support life. One of the most commonly used methods for detecting new planets is the transit technique. This technique involves observing the decrease in a star’s light when a planet passes in front of the star. This method has successfully revealed thousands of exoplanets, including some in the habitable zone, places where conditions might support life. An interesting example of a new planet discovery is the TRAPPIST-1 system located about 40 light years from Earth. This system has seven planets, of which three are in the habitable zone. Scientists believe that these planets could have liquid water, which is an essential component for life. In addition to the transit technique, astronomers also use the radial velocity method, which measures the motion of stars due to the gravity of the planets orbiting them. This method provides insight into understanding the mass and size of exoplanets, as well as their distance from their parent stars. With the combination of these various techniques, the discovery of exoplanets is becoming more accurate. The existence of this new planet increases our understanding of the formation of planetary systems and the evolution of life beyond Earth. By studying the atmospheres of these planets, scientists can look for signs of gas that could indicate the potential for life. For example, the presence of oxygen, methane and carbon dioxide in the atmosphere can be an indicator of the presence of microbial life or other living creatures. In recent years, space telescopes such as Kepler and TESS (Transiting Exoplanet Survey Satellite) have led to extraordinary discoveries in the study of new planets. Kepler, for example, managed to discover thousands of exoplanets during its lifetime, while TESS is on a mission to explore more nearby star systems. A growing issue is the possibility of a new planet in our galaxy that has conditions similar to Earth. Planets such as TOI-700 d and LHS 1140 b demonstrate this potential, especially at scales closer to Earth than other objects. This opens up opportunities for further research to look for signs of life. These planets can also provide deeper information about the factors that influence habitability. The discovery of ice layers on moons of Jupiter and Saturn such as Europa and Enceladus suggests that beyond these planets, there may be more places that could support life. Astronomers realize that the discovery of new planets is not only important for science but also challenges our understanding of our position in the universe. Through further research and space exploration, the possibility of discovering more mysterious and exciting new worlds in our galaxy is increasingly opening up. These discoveries will certainly encourage international collaboration and funding for future space investigation projects.