SMRTR Science & EngineeringMay 24, 2025Live Science

Scientists have discovered a new dwarf planet in our solar system, far beyond the orbit of Neptune

SMRTR summary

A new dwarf planet, 2017 OF201, has been discovered beyond Neptune's orbit. About 435 miles in diameter, it follows an extreme 25,000-year orbit around the sun, ranging from 45 AU to 1,600 AU. The object's unusual trajectory suggests complex gravitational interactions and may challenge theories about Planet 9. Its discovery hints at potentially hundreds of similar undiscovered objects in the outer solar system, highlighting how much remains unknown about our cosmic neighborhood.

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