Planet No. 9

Astronomers at the California Institute of Technology have been researching the possibility of a ninth planet on the outer edge of our solar system for years.

Konstantin Batygin and his colleague Michael Brown have found clues to its existence by studying trans-Neptunian objects and running simulations to understand the movements of these objects.
The best model explains these movements by the presence of a ninth planet.
The Vera C. Rubin Observatory is expected to provide further insights when it becomes operational. This telescope is scheduled to be completed next year.

The hypothetical ninth planet is estimated to be about ten times the mass of Earth.

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Design/Animation: Markus Mueller