A previously unknown world has been identified far beyond Pluto, expanding our view of the outer solar system. Nicknamed Ammonite and officially designated 2023 KQ14, this icy body was detected using the Subaru Telescope in Hawaii and later confirmed by analyzing archival observations spanning nearly two decades. With an estimated diameter of up to 380 kilometers, it is large enough to qualify as a significant trans-Neptunian object. Ammonite belongs to an extremely rare group known as sednoids—