SMRTR TechJul 31, 2025Live Science

The hunt for 'Planet Nine': Why there could still be something massive at the edge of the solar system

SMRTR summary

The search for a hypothetical "Planet Nine" at the edge of our solar system continues, driven by observations of unusual orbits of Kuiper Belt objects. While some astronomers believe a massive planet could explain these orbits, recent discoveries challenge this theory. New sednoid objects with stable orbits suggest any Planet Nine would need to be extremely distant, complicating detection efforts. Ground and space-based telescopes remain key to unraveling this cosmic mystery.

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