Planetary scientists have presented the theory of ‘Planet 9’ after noticing that something was exerting a gravitational force on objects in the Kuiper Belt – an area of comets, the dwarf planet Pluto and huge icy objects beyond Neptune that encircles the whole solar system.

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In this TEDx talk, professor of physics, Dr. Renu Malhotra talks about the search for the hypothesized 9th planet in our Solar System.