Searching for the mysterious Planet 9

Last year, two astronomers from Caltech shocked the science community when they announced that they had ironclad evidence pointing to a planet orbit at the farthest edge of our Solar System. They dubbed the mysterious lurker Planet 9, or Planet X, claiming the object was roughly 10 to 12 times the mass of Earth and orbiting so far out that it takes up to 20,000 Earth years for the planet to complete one loop around the Sun.
We haven’t exactly seen this planet yet
The only problem with the