In other words, PlanetX was a hypothetical rogue planet that appeared unexpectedly from the abyss of deep space and ambushed the unsuspecting Earth every once i

In other words, PlanetX was a hypothetical rogue planet that appeared unexpectedly from the abyss of deep space and ambushed the unsuspecting Earth every once in a while. It has a dormamu vibe. I see why the scientists didn't like it.