The discovery of a new planet in the solar system is attracting the attention of scientists and astronomy enthusiasts around the world. With advances in telescope technology and space missions, the potential for discovering new planets is increasing. One of the main focuses is the search for an object that may be the ninth planet, often referred to as “Planet X.” Many studies show that on the outskirts of our solar system, there are large objects that could become new planets. Research by astronomers such as Mike Brown and Konstantin Batygin at Caltech has indicated the existence of large objects that may influence the orbits of some trans-Neptunian objects. Their research strengthens the hypothesis that there are large planets waiting to be discovered in the Kuiper Belt. Technically, the discovery of new planets requires careful observations and complex mathematical calculations. Astronomers use techniques such as astrometry to track the movement of small objects beyond Neptune. By studying irregularities in the orbits of these objects, scientists can identify the gravity of the large objects that are pulling them. Various space missions, such as TESS (Transiting Exoplanet Survey Satellite) and the James Webb Space Telescope, increase the possibility of discovery. TESS was designed to search for exoplanets, but its scope and ability to observe objects in the solar system also makes it an important tool for searching for new planets. The discovery of new planets also carries significant scientific implications. If discovered, it could change our understanding of the formation and evolution of the solar system. For example, the discovery of large-scale planets in the Kuiper Belt could provide insight into how our solar system evolved. Research into the characteristics of the new planet, such as atmospheric composition and geological activity, is also of major interest. The general public is very enthusiastic about the discovery of this new planet, because it gives hope for the possibility of life outside Earth. Planets located in the habitable zone increase the likelihood of liquid water, which is an essential condition for life. Discussion among astronomers continues to grow, with many believing that our solar system still has secrets yet to be revealed. Increased computing power for orbit modeling, along with better imaging, is allowing scientists to better understand the space environment. In the future, the possibility of discovering new planets is increasing. The existence of international collaboration in the field of astronomy also accelerates the search. Large observatories in various parts of the world carry out sky surveys to find new objects that have not yet been identified. With each new discovery, our understanding of the universe deepens. Technological research and development activities not only provide answers, but also raise new questions about our place in the universe. The discovery of new planets is a step towards understanding the complexity of the solar system.