Read More: Why Can’t We Find Planet Nine? https://www.quantamagazine.org/why-ca... “Astronomers suspect that there’s a large planet hiding out in the distant fringes of the solar system. At a recent workshop, they brainstormed ways to coax it into view.”
The Search For Planet X Gets a Boost With the Discovery of a Super Distant Object https://www.theverge.com/2018/10/2/17... “A new discovery is strengthening the idea that a large, mysterious planet — known as Planet 9 or Planet X — may be lurking unseen at the Solar System’s edge. Astronomers say they have found a tiny object orbiting far out from the Sun that fits with the Planet X theory.”
Hypothetical Planet X https://solarsystem.nasa.gov/planets/... “Caltech researchers have found mathematical evidence suggesting there may be a "Planet X" deep in the solar system. This hypothetical Neptune-sized planet orbits our Sun in a highly elongated orbit far beyond Pluto.” ____________________
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