#Planet9
Science & Technology | Science
Planet Nine: The answer to this cosmic mystery may come sooner than you think
Is it a planet, a black hole, or a group of planets? One astronomer has an ambitious idea to find out.
Science & Technology | Cool Stuff
Mysterious Gravitational Tug on Orbiter May Help Find Planet Nine - Scientific American
Astronomers are homing in on the whereabouts of a hidden giant planet in our solar system, and could discover the unseen beast in roughly a year
