Nowe dowody na 9 planetę
"If there is nothing to perturb them, the nodes of these extreme trans-Neptunian objects should be uniformly distributed, as there is nothing for them to avoid, but if there are one or more perturbers, two situations may arise," explains Carlos de la Fuente Marcos, one of the authors, to SINC. "One possibility is that the ETNOs are stable, and in this case, they would tend to have their nodes away from the path of possible perturbers. But if they are unstable, they would behave as the comets that interact with Jupiter do, tending to have one of the nodes close to the orbit of the hypothetical perturber."
Using calculations and data mining, the Spanish astronomers have found that the nodes of the 28 ETNOs analysed (and the 24 extreme Centaurs with average distances from the sun of more than 150 AU) are clustered in certain ranges of distances from the sun; furthermore, they have found a correlation where none should exist between the positions of the nodes and the inclination, one of the parameters which defines the orientation of the orbits of these icy objects in space.
"Assuming that the ETNOs are dynamically similar to the comets that interact with Jupiter, we interpret these results as signs of the presence of a planet that is actively interacting with them in a range of distances from 300 to 400 AU," says De la Fuente Marcos. "We believe that what we are seeing here cannot be attributed to the presence of observational bias."
https://phys.org/news/2017-07-evidence-planet-hypothesis.html