Does Planet 9 Exist?

so you think planet 9 exists with 99.8% probability something like that yeah maybe 19 I'll push too high 99% probability this just wishful thinking I mean if you're that sure find it in the farthest reaches of our solar system way past Neptune and Pluto a ninth planet may be lurking it's predicted to have a mass five times that of Earth and to orbit once every 10,000 years on a highly elliptical inclined orbit so why do some scientists suspect that such a strange object exists that's what I've come to Caltech to find out we're going to do your work you know my I usually do it wherever okay wherever I have a couple minutes of free time which isn't really so this is where a lot of it is nothing my name is konstantin batygin I am a professor of planetary science at Caltech and I do all kinds of astrophysics seeing planetary studies including stuff about planet 9 these are variable transformations I'll tell you where the planet 9 boundary lies it's like that so everything to the left of that is all fun at night so I'm here to find out about hidden planets and how to find hidden planets with math okay so how do we do that I mean do you want to start at the beginning of this sort of endeavor or do you want to jump into planet 9 where do you want to start well let's actually let's start at the beginning because the beginning it has a long and beautiful history to it in its origins dates back to 1781 I believe when Uranus was first discovered by Herschel and when Herschel discovered Uranus he immediately realized that the star that was slowly moving across the sky had actually been imaged many many times before and there was a matter of going back to old observations and kind of retracing the orbit that Uranus was falling on on the sky and astronomers and mathematicians of the time immediately noticed that there was a problem with orbit of this newly discovered planet it was deviating from where was supposed to be but I'm a French mathematician by the name of or bomb the very a eventually did this beautiful and very complicated set of calculations that said okay if there is a planet is there right and that part ...