Description in the comments!

Planet X is a theoretical gas giant, bigger than Neptune and Caelus!
Its appearence is unknown, but the Youtube channel SolarBalls made Planet X appear dark blue.
If it does exist, It's over 30 times further away from The Sun than Neptune, which might be why we don't know a lot about it. NASA spotted a strong source of gravity far from The Sun, and it could possibly be the 9th planet of The Solar System.

Yes, I'm a nerd. What'cha gonna do about it bro?

Voyager 2 will only get there in about 360-ish years, so if we wanna find it, we'll need something much faster.

How could a planet that far from our solar system be in it? Pluto isn't even considered a part of it anymore, this feels unfair

Well Pluto was demoted because of its mass, not the distance from The Sun, and the Solar System is everything inside The Oort Cloud, which is 2000-5000 astronomical units away from The Sun, more than enough to make Planet X part of The Solar System

Good point, but that doesn't make Pluto not part of the solar system

Yeah Pluto is still part of the solar system, just isn't a planet

Wait...I have a post I will do today abt Pluto, just wait

ok

They can only assume it's a planet, right? Don't black holes are a source of gravity, right? Explain more...

well black holes are extremely dense, which means that if there is a black hole it would be tiny. These types of black holes are extremely rare, because collapsing such a tiny object isn't really possible. It's possible, but really improbable.

Yee