The discovery of a new planet in our Solar System is exciting news for astronomers and science fans. The existence of this planet, which is referred to as the “ninth planet”, has attracted the attention of many scientists and researchers. This planet is thought to be located in the outer part of the Solar System, farther than Neptune. Since 2006, astronomers have suspected the existence of this 9th planet after discovering a number of trans-Neptunian objects that had strange and unexplained orbits. Further research showed that these objects appeared to be influenced by the gravity of an unknown planet. This planet is believed to have a similar mass to Mars, but is much larger. To verify the existence of this planet, researchers used a variety of advanced observation tools, including ground-based and space telescopes. Observations are carried out to track the movement of suspicious objects in the outer Solar System. This discovery opens up opportunities to understand more deeply how the Solar System formed and its evolution. This new planet could also become a focal point for future space exploration missions. Many scientists hope to send spacecraft to study the planet directly. Data obtained from such a mission could provide valuable information about the planet’s composition, atmosphere, and habitability potential. One interesting aspect of the discovery of this new planet is the possibility of a moon orbiting around it. If true, the moon could become a place for further study, helping scientists understand the dynamics of planets and moons in the Solar System. This discovery also stimulated discussion about the definition of what a “planet” is. Since Pluto was removed from the list of Solar System planets in 2006, the criteria for determining planets have become stricter. This discussion opens up the opportunity to revisit these criteria, especially if this new planet meets many of the planetary characteristics that have been established. Global public interest in this discovery is very high, as can be seen from the number of publications and articles discussing it. Many people want up-to-date information about this discovery, showing how much human curiosity about our place in the universe. The discovery of new planets not only expands our knowledge of the Solar System but also gives hope for more discoveries in the future. Continued research in this area will reveal more mysteries and increase our understanding of our place in the cosmos. Astrophysics, astronomy and space science will benefit greatly from these developments, which will make space exploration journeys even more interesting. The technological advances that support these discoveries, such as the use of artificial intelligence to analyze data and advanced algorithms, also provide a glimpse into the future of space research. By applying these innovative techniques, scientists hope to discover more new objects and phenomena that may still be hidden behind the dark curtain of outer space.