Will we ever find Planet 9? The mystery that could lie at the edge of our solar system

Planet nine may be orbiting far from the Sun, at the edge of our solar system. Astronomers, seeing odd irregularities in the orbits of the outer planets suspect another, unknown, planet may orbit beyond the eight we know of today. The number of known planets in our solar system has risen and fallen over time. From the six worlds known to ancient people (including Earth), astronomers have found the planets Uranus and Neptune. Uranus was first seen in 1781, and seventy years later, astronomer Giuseppe Piazzi announced his discovery of an “eighth planet,” orbiting between Mars and Jupiter. This object, Ceres, was…

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