Planet Nine
Planet Nine the undiscovered planet at the edge of the solar system appears to be responsible for the unusual tilt of the Sun, according to a new study.
Astronomers Think Planet Nine Threw Our Solar System off Tilt
Two groups of scientists reach the same conclusion about the elusive ninth planet.
It has likely had a really rough life.
Poor super-Earth.
Astrophysicists Have Modeled What Planet Nine Could Look Like
The results may explain why telescopes haven’t spotted it yet.
More Evidence Surfaces for Planet Nine’s Existence
The planet may also be linked to periodic mass extinctions on Earth.
Its orbit is so large it would take nearly 20,000 years to go around the sun once.
Massive Shadowy Planet May Lurk Beyond Pluto
A curious orbital pattern among objects in the Kuiper Belt points to the presence of a hidden planet at the very edge of the solar system, too far for us to detect but large enough to exert strong gravitational effects on surrounding celestial bodies.