Planet Nine: does it exist?

[Kyng]

So I personally think it's a planet that was thrown into the outer solar system during the gas planet migration.  In fact it's often theorized that there was a 5th gas planet and it's entirely possible a gas planet core that was stripped of it's atmosphere is what's been disrupting the orbits.

Furthermore it could explain a few things like how Venus slowly spins backwards, often thought to be caused by a close pass or grazing impact, or how the asteroid belt could be at least in part, a planet that was either disrupted during formation or ripped apart.

This would all also line up fairly well with the expected orbit of planet nine.  But that's just my own thoughts on the matter.

Yeah, I had heard a while back that the orbital mechanics of the Solar System were easier to explain if there had been a fifth large planet - but, I haven't looked into it in detail.

Makes sense to me - although, considering I want it to be a ninth planet, I can't say I'm looking at the evidence objectively right now !