For several decades scientists unsuccessfully searched for Planet X, but a couple of scientific teams have announced in recent years that they may have discovered it!
Whether you call it Planet Nine or Planet X or Nibiru, there are a lot of people looking for an alleged large planet in our solar system far beyond the orbit of Neptune which may or may not explain the odd orbits of trans-Neptunian objects and may or may not collide with Earth someday. Speculation. Read more ยป