A Cambridge scientist maintains that there may be far more planets in the solar system than we realize.
A new theory has suggested that the new planet could be responsible for periodic mass extinction events.
The case for a hidden gas giant in the outer solar system continues to go from strength to strength.
Astronomers in France have managed to narrow down the area in which the new planet could be located.
Astronomers in the US believe that there could be a large undiscovered planet in our own solar system.
Researchers have identified what could be two new large planets in the outer reaches of our solar system.
Evidence suggests that two planets larger than the Earth may be present in the outer solar system.
Researchers had theorized that a gas giant in the Oort Cloud may have been affecting the orbit of comets.
Have we discovered all the planets in our solar system or could there still be more out there to find ?