Astronomers have found strong evidence of a mysterious planet, dubbed Planet Y, in the far outskirts of our solar system. Though not directly seen, its presence is inferred from strange orbits of 50+ Kuiper Belt objects.

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• Planet Y possibly exists beyond Neptune in Kuiper Belt
• Evidence: unusual orbital tilt in 50+ distant icy objects
• Tilt of 15° observed around 80 AU from Earth
• Study published in Monthly Notices of the Royal Astronomical Society: Letters
• Planet Y likely smaller than Earth, larger than Mercury
• Not the same as proposed Planet Nine (much farther, heavier)
• Discovery based on computer simulations, not direct imaging
• Hypothesis sparked by strange tilt unexplained by current models
• May orbit 100–200 times Earth-Sun distance, 10°+ inclination
• Chile’s Rubin Observatory may confirm existence in next 2–3 years