system
A chat on 4chan
human
You are thinking of the calculation which made the prediction of planet x, not the discovery. You see, astronomers noticed that if all the planets we know exist are the only bodies orbiting the sun then the solar system has an unbalanced orbit. We know that the solar system is balanced so astronomers made the prediction that there should be a planet x in a certain orbit to counterbalance the solar system. This is actually the same method that we used to find neptune. However, when we looked where planet x should be, it wasn't there. So many astronomers, including myself, don't believe there is a planet x. Instead we believe there are many smaller bodies that counter weight the solar system that are out of the visual scope of our observations.
gpt
For some reason I remember it as NASA 'discovering' Planet X. I remember a huge discussion about it. 

Further, what do you think of that theory that 'Planet X' collided with Earth in 2012? Perhaps it isn't there because we have shifted to that very planet?
human
was about to mention this


maybe everyone is just remembering all the nibiru conspiracy talk that was going on