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⏲ Duration: 1:20 👁 View: 65.4M times ✓ Published: 29-Apr-2024
Description: Does our Solar System have 9 planets or only 8? Astronomers have gone back and forth on that a lot, with Pluto now being classified as a dwarf planet. However, out beyond Neptune there could be another elusive object orbiting the Sun and experts say they have the best evidence we’ve ever found for its existence.
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