The hypothetical Planet Nine is popularly attributed to the strange movements of objects in the outer solar system. Researchers now say these strange orbits could be explained by the collective force of smaller objects.
Space January 21, 2019
Astronomers think that Planet Nine exists at the edge of the Solar System. Here's one possible reason why the body remains elusive despite circumstantial evidence that it exists beyond planet Neptune.
Space September 3, 2018
A new theory suggests gravity of smaller space debris could explain the strange orbits of Sedna and other trans-Neptunian objects. Here's why it failed to debunk the existence of Planet Nine.
Space June 7, 2018
The trans-Neptunian object called Niku orbits the sun in a plane tilted 110 degrees to the plane of the rest of the bodies in the solar system and orbits backwards. Is the hypothetical Planet Nine responsible for this odd behavior?
Space August 12, 2016