Could there be another undiscovered planet in our solar system?

Well, maybe a stupid question, but I will ask for anyway. I heard all the b / s about a possible planet (Planet X or Nibiru), which may be part of our solar system. I do not really, but I wondered if there was any type of credibility of this allegation. Please be kind in your replies, it's just a question and the only stupid question is the one not asked. Thank you all: -)

There is much speculation about whether or not there is another planet in our solar system that astrologers may have lost. It could be, and could not be. This is one of the unanswered questions final. However, I think there might be another planet in our system Dom After all, the space is quite large, and the extent of our knowledge is so vast that Our technologies allow us to see out there. I am not a scientist, so you can choose to ignore my response, but that's what I think is, and that's all I have to say. Cheers.

Bjorn Mendizabal “Ataraxia” (Planet X)