The discovery at the Solar System’s frozen edge that deepened a long-running astronomical puzzle, casting new doubt on ‘Planet Nine’ — the giant, unseen world some astronomers believe is quietly tugging at the most distant orbits

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A small icy world found far beyond Pluto has made the case for some proposed versions of Planet Nine look weaker, not stronger. On 14 July 2025, Nature Astronomy published the discovery of an object provisionally designated 2023 KQ14 and nicknamed “Ammonite” by the research team. It was first identified using the Subaru Telescope on [...] The post The discovery at the Solar System’s frozen edge that deepened a long-running astronomical puzzle, casting new doubt on ‘Planet Nine’ — the giant, unseen world some astronomers believe is quietly tugging at the most distant orbits appeared first on Space Daily .