Planet Nine: The solar system's ninth planet could be one step closer to discovery

The video explores the potential existence of Planet 9, a sizable object in the Kuiper Belt that may explain the unusual clustering of dwarf planet orbits. It is hypothesized to have a large orbit, taking 20,000 years to circle the sun, and is estimated to be four times the size of Earth with a mass ten times greater. Planet 9 might be closer than previously thought, possibly coming within 200 astronomical units of Earth. Its gravitational pull could also influence other objects in the Kuiper Belt, forcing them into perpendicular orbits.

What is the estimated size and mass of Planet Nine compared to Earth?

How might Planet Nine's gravity affect other objects in the Kuiper Belt?