Planet Nine, as researchers claim, is a massive planet almost the size of Neptune probably found in the frozen region of the Kuiper Belt in our Solar System. Probably
because the planet has never been seen nor photographed.
But how do scientists know the existence of Planet Nine?
Caltech/R. Hurt (IPAC)
Let's just say it's like how it goes in our human world. It's like being stuck in traffic but as you witnessed an ambulance pass by, you started to understand that there may be an accident ahead.
Scientists have found the evidence of Planet Nine's existence as inferred by smaller planets in the Kuiper Belt. These planets lined up in a way that suggested the gravitational influence of another much more massive object, and that's Planet Nine.
But Planet Nine may not be an exoplanet they initially thought it was.
The massive planet may actually be a former rogue planet that was captured by our Solar System, according to James Vesper, an undergraduate at New Mexico State University (NMSU).
There has been 156 encounters of rogue planets by our Solar System. The scientists performed a simulations of these rogue planets of different sizes and trajectories.
In 60 percent of the simulation, the result showed that these rogue planets get flung out of the Solar System and they take another planet along with them.
Well, when you get in rogue, you leave rogue. That seems to be the case in majority of these rogue planets.
Another findings showed that our solar system has not encountered any planet larger than Neptune.
The report is announced in 229th meeting of the American Astronomical Society in Grapevine, Texas.
See: NASA Space Heist Mission: Steal from Asteroid, Give to Moon