Does Planet 9 Exist?

A planet has been predicted to orbit the sun with a period of 10,000 years, a mass 5x that of Earth on a highly elliptical and inclined orbit. What evidence supports the existence of such a strange object at the edge of our solar system?
Huge thanks to:
Prof. Konstantin Batygin, Caltech
Prof. David Jewitt, UCLA
I had heard about Planet 9 for a long time but I wondered what sort of evidence could support the bold claim: a planet at the very limits of our ability to detect one, so far out that its period is over 60 times that of Neptune. The planet 9 hypothesis helps explain clustering of orbits of distant Kuiper belt objects. It also explains how some of these objects have highly inclined orbits - up to 90 degrees relative to the plane of the solar system. Some are orbiting in reverse. Plus their orbits are removed from the orbit of Neptune, the logical option for a body that could have ejected them out so far. The fact that the perihelion is so far out suggests another source of gravity was essential for their peculiar orbits.
Special Thanks to Patreon Supporters:
Alfred Wallace, Arjun Chakroborty, Bryan Baker, Chris Vargas, Chuck Lauer Vose, DALE HORNE, Donal Botkin, Eric Velazquez, halyoav, James Knight, Jasper Xin, Joar Wandborg, Kevin Beavers, kkm, Leah Howard, Lyvann Ferrusca, Michael Krugman, Mohammed Al Sahaf, Noel Braganza, Pindex, Ron Neal, Sam Lutfi, Stan Presolski, Tige Thorman
Music from "Observations - From Now On" "Magnified XY"


  1. Ai

    Ai10 分 前

    Name it Plunov/Plunove

  2. Jim McClarin

    Jim McClarin2 時間 前

    Millennia before the putative first discovery of the telescope the Sumerians are said to have recognized the asteroid belt and the outer planets invisible to the naked eye, including an outermost planet with an extremely eccentric orbit that today’ s astronomers have only recently postulated and are now seeking. They numbered the planets beginning with that outermost planet and working inward exactly as a space traveler might.

  3. ebiros2

    ebiros210 時間 前

    Planet 9 might be a micro black hole, about 11 inches in diameter. If it is, chances of it getting found by observation is practically nil.

  4. Lets Suck

    Lets Suck11 時間 前

    we should call planet 9 "dolos" which is a greek got of trickery if we find it because for how long it hid

  5. rohan daniel

    rohan daniel14 時間 前

    those who are into ancient civilization astronomy have heard of the planetary disasters that happen every 10,000 years. what if planet 9 plays a role in that?

  6. Martin Edwards

    Martin Edwards16 時間 前

    “That’s a good question” Clean your offices.

  7. Heather Gray

    Heather Gray17 時間 前

    How can the older gentleman deny planet 9 when you can clearly see it's gravitational pull on his cup of coffee.

  8. john abbot

    john abbot日 前

    Can't they calculate the best they can and point the Hubble telescope in the best calculated guess?

  9. Yours Truely

    Yours Truely日 前

    Always interesting to see how many ways there are to explain why you are wrong and not admitting it.

  10. reynoldsmathey

    reynoldsmathey2 日 前

    Yeah, it's called PLUTO. Suck it, Neal de Grasse Tyson!

  11. Steve Deasy

    Steve Deasy2 日 前

    I'm surprised Konstantin didn't suggest a name of Dick Sock for planet nine after noticing his Red Hot Chili Peppers t-shirt.

  12. Bonny Pop

    Bonny Pop2 日 前

    How could you not call it nibiru?

  13. blech71

    blech713 日 前


  14. Slade AF

    Slade AF4 日 前

    It’s 4am... I need to go to sleep

  15. Edison's Cat

    Edison's Cat4 日 前

    Um actually ... It would be Planet 10 because Pluto is a planet.

  16. Rhan

    Rhan4 日 前

    Planet 9 is so racist to pluto !!!

  17. Melvorgazh

    Melvorgazh4 日 前

    It's named PLUTO !

  18. Bland

    Bland4 日 前

    ok but who found the Kuiper belt

  19. Chirchy

    Chirchy4 日 前

    Bruh why don’t they just use Hubble to search the solar system

  20. Stacy Mackenzie

    Stacy Mackenzie4 日 前

    Only on Friday morning at 935..

  21. Martin Eastburn

    Martin Eastburn4 日 前

    Was "Planet 9" and even others extra-solar and were considered wandering "Stars" or wondering planets from former collisions of other galaxies or even ours ? This might define the off angle. Just a thought. I don't consider all of the planets and space junk started from the junk box our star started with to create a system.

  22. Tengou

    Tengou4 日 前

    "It used to but then we redefined it."

  23. Awe Dee.0

    Awe Dee.04 日 前


  24. Samuel Banks

    Samuel Banks5 日 前

    How many moons could it have

  25. Ivica Jaranovic

    Ivica Jaranovic5 日 前

    Oh Nibiru, Nibiru where are you?

  26. HoKy

    HoKy5 日 前

    Helping in the search: LSST. Not helping: SpaceX' Starlink satellites. Would be interesting to find though :)

  27. Bal Loney

    Bal Loney5 日 前

    I know for sure CLOUD 9 exist... and I always enjoy it!

  28. Time Traveling Reader

    Time Traveling Reader5 日 前

    Yeah, you planet snobs--people like you and Neal DeGrasse Tyson--need to stop trying to find and adopt new planets and start accepting Pluto as one. Pluto is the ninth planet.

  29. E 10

    E 106 日 前

    Your never gonna see thay planet again Your moving through space And That planet isnt conneted with earth solar system

  30. Carbon No6

    Carbon No66 日 前

    The old fossil that is wrong about people being psychologically misconstrued about the undiscovered planet.. there may not currently be any conclusive evidence, but until you can rule it out with 100% certainty a slim chance can become reality.. he’s the type of dunce that values his opinion over everyone’s. Also expects people to believe his word without question..

  31. Jan Petersson

    Jan Petersson6 日 前

    Also my grandma told me when I was Young; -What a hell are they doing, shall they try to cheat us we live on a glob?

  32. Brandon E. Smith

    Brandon E. Smith6 日 前

    It's not a planet. It's a black hole.

  33. Ganesh Mourya

    Ganesh Mourya7 日 前

    You came to Caltech and didn't ask for Rajesh kootherpali, so disappointing....

  34. Planet 9

    Planet 97 日 前

    Of course I exist!

  35. T F

    T F7 日 前

    Thanks for the vid. Always great.

  36. SDMF5000

    SDMF50008 日 前

    I keep waiting for Sheldon to walk in.

  37. Talk ID

    Talk ID8 日 前

    Is there a possibility, planet nine is once existed and become rogue planet that escape sun gravity bcs too elongated orbit?

  38. Follower of Jakob Lorber

    Follower of Jakob Lorber8 日 前

    Long time ago there was another planet in our solar system between Mars and Jupiter. The name of that planet was Phaeton or Mallona, Mallona means broken planet. Mallona was destroyed during a nuclear war, only the four moons of Mallona survived. You will know everything about Mallona and more if you read the books of Jakob Lorber (1800 - 1864) and Leopold Engel (1858 - 1931).

  39. Dare BGD

    Dare BGD8 日 前

    Ok, but how all of this fits into the flat Earth theory ?

  40. Wayne Wayne

    Wayne Wayne8 日 前

    Apparently a dress code is not enforced at their universities.

  41. Norman Thornton

    Norman Thornton8 日 前

    This theory is based on the perturbations of Saturn, Uranus and Neptune from a gravitational perspective. That is some mass at some distance is causing through gravity the anomalic behavior of these Planets. What is not considered is the real reason of the perturbations in each of these bodies orbits. Saturn, Uranus and Neptune all beat to a different drummer as far as time goes.The value of a momentum of duration of a second on each body is slightly shorter than it is on Earth and each other. Time is based on the distance from the seat of the Sun plus the mass of the object it is being measured on. At our distance and mass we place a value of momentum as being one interval known as the second. It is not the same on Mercury, Venus nor Mars nor in the Asteroid Belt nor Jupiter. Based on the astronomer's calculations of Planet nine's mass, they should be able to pinpoint its location relatively easy, but they find nothing at the appropriate distance. . .

  42. John Farrell

    John Farrell9 日 前

    Me: Where is the washroom? Konstantin: That's a great question. Turn left third door on the right.

  43. Tanya Sapien

    Tanya Sapien9 日 前

    see, people, this is why Pluto needs to be a planet. If Pluto's planet 9, then that makes this new one Planet 10, AKA Planet X. Who doesn't want to go looking for Planet X?

  44. rmyukon

    rmyukon9 日 前

    @3:14 - The statement here perfectly sums up the Democrats insanity over Donald Trump, AKA Trump Derangement Syndrome. Even though there is NOTHING there, they believe there is. And they believe it so much that, even though he's not a fascist, racist, Hitler-ish puppet of Putin, they are convinced he is. #Trump2020

  45. The Symphony of Science

    The Symphony of Science9 日 前

    Finally, Nibiru ;))

  46. Mr.DeadLifts

    Mr.DeadLifts9 日 前

    Just name it "The Planet 9"

  47. Stephen Dickens

    Stephen Dickens9 日 前

    And 10, 11, and 12, oh wait were not there yet, my bad.

  48. DragonsREpic

    DragonsREpic9 日 前

    Since when is Pluto not a planet? At what point is a midget not a person that they lose their human rights or classification

  49. Sebastian Nolte

    Sebastian Nolte9 日 前

    "Since when is Pluto not a planet?" Since August 2006. "At what point is a midget not a person that they lose their human rights or classification" Pluto haven't lost its classification because of its size. The new definition for "planet" that was made in 2006 is: A "planet" is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit. Pluto fulfils (a) and (b), but not (c). So objects that only fulfils (a) and (b) are dwarf planets. BTW, with that new definition, Ceres (in the asteroid belt between Mars and Jupiter) was upgraded from "asteroid" to "dwarf planet". Ceres used to be a planet when it was discovered in 1800, but then it losts its status at about 1850 and became part of the new categroy "asteroid", when more and more objects were discovered in the asteroid belt, and it would not make sense to classify them all as "planets". So in the 1850s Ceres suffered the same fate as Pluto in 2006.

  50. DragonsREpic

    DragonsREpic9 日 前

    Since when is Pluto not a planet? At what point is a midget not a person that they lose their human rights or classification

  51. fartwrangler

    fartwrangler10 日 前

    The 9th planet was discovered in 1930; we call it "Pluto". There is no such planet as "Urine Us". There's one called Uranus (you-RAIN-us).

  52. Stephan de V

    Stephan de V10 日 前

    basicly the hypothesis is not believed by enough people to give hubble telescope a go looking over there. (as from earth the atmosphere is mostly bothersome in general looking for such a dim objectt). well it will be a long long time before we know it its there or not then

  53. Rand Lee

    Rand Lee10 日 前

    Fantastic presentation! However, my girlfriend often referred to me as a "2.6 sigma result". Damn those black holes!!! Damn them!!!

  54. Nerd's Cantina

    Nerd's Cantina10 日 前

    If I'm the first one to actually spot it can I name it.

  55. Joey Holthusen

    Joey Holthusen10 日 前

    The beginning starts with ancient Sumerian text, kolbrin bible, Hopi Indian history, Book of Enoch, Job 38, Exodus, ect... Myths and legends may be more real than masses can imagine.

  56. Cristian Pop

    Cristian Pop10 日 前

    Writing this with the full knowledge that it may never be seen by someone with the proper knowledge: in the video, they mentioned that some of the kuiper belt objects have orbits in the same direction and that only a few have been spotted to be orbiting the other way. Does any smart person know if that direction happens to be the opposite of where the Sun is going around the galaxy? Would it make sense that most of the objects orbit in that direction because the sun keeps pushing that way in its race around the milky way and "leaves them behind"?

  57. Rampart

    Rampart11 日 前

    Planet 9 From Outer Space

  58. arvarvanwar

    arvarvanwar11 日 前

    It would be cool to name it Mondas (even though Mondas was the tenth planet, that was back when Pluto was considered a planet).

  59. xXRafyGamingXx

    xXRafyGamingXx11 日 前

    yeah the planet still here

  60. Nero Lowell

    Nero Lowell11 日 前

    According to Zacharia Sitchin planet 9 orbit is about 3600 years

  61. DarkZ_ GamZ

    DarkZ_ GamZ11 日 前

    Basically NASA is saying they can find planets 100-100000 light years away but they can’t find a planet less then one light year away