Trans-Neptunian Objects (TNOs) are celestial bodies located in the region of the solar system beyond the orbit of Neptune. They include a variety of objects such as dwarf planets, comets, and asteroids. TNOs are significant for understanding the formation and evolution of our solar system, as they are remnants from its early days. These objects are often categorized based on their orbits and characteristics. Some well-known TNOs include Pluto, Eris, and Haumea. Studying TNOs helps astronomers learn more about the dynamics of the outer solar system and the potential for discovering new celestial phenomena.