Astronomers have made a groundbreaking discovery that could lead to the identification of the elusive Planet 9! This giant, mysterious world, potentially larger than Neptune, was detected in two ...

Evidence has been building of a huge planet, known to astronomers only as Planet 9, which may be lurking at the outer regions of the solar system. Other models show something is pulling objects that ...

Astronomers have discovered icy rocks in the outer solar system that seem to defy the laws of physics, raising questions ...

Mike Brown is convinced that beyond Neptune, at the far reaches of our solar system, there's an unseen giant planet. "This is the 5th largest planet in our solar system, lurking out there, waiting to ...

Researchers at the California Institute of Technology (Caltech) have found new evidence that further suggests there is a ninth planet in our solar system. Nicknamed "Planet Nine," researchers said ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

Because the solar system's contents formed from a disk around the sun, we would expect the orbits of everything orbiting the sun to keep relatively close to the plane of that disk. However, some don’t ...

Researchers closely tracked and computationally analyzed moon and asteroid sized objects beyond Neptune and determined that a ninth planet about five times bigger than the Earth is about 16 times ...