The far reaches of the Solar System are a dim and distant realm with particulars that elude us.
around 6.3 times the mass of Earth, orbiting at a distance greater than 460 astronomical units.
But they were not the first to provide an explanation. Lykawka and colleague Tadashi Mukai, then at Kobe University, noted TNO clustering and proposed aNow, with a bunch more data on what's out there, Lykawka and Ito have revisited the idea and refined it. They have found the properties of a hypothetical planet that could explain several peculiarities of the Kuiper Belt. Further observations could determine whether they are right.
The pair's findings offer testable signatures of their hypothetical planet. The planet's gravity would push TNOs together into clustered populations beyond 150 astronomical units, which we might be able to find as our techniques and instruments improve.
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