Yesterday’s discovery of 2012 VP113, very likely the fifth dwarf planet in our solar system, was important in its own right. But it now seems quite possible that there’s something much, much larger out there that has influenced its orbit—a very large object that we can’t see and know nothing about.
2012 VP113′s 4,000-year orbit never brings it anywhere near the Sun—at its closest it’s 12 billion miles away, more than three times the average distance between the Sun and Pluto. It’s way out there, as this animation from Clark Planetarium shows:
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