Strip the Cosmos (2014)

S2E6 Solar System: Hunt for the Missing Planet

The solar system, while seemingly well-known, may be hiding a colossal secret in its distant outskirts. Researchers believe they might have found evidence of a massive, elusive ninth planet orbiting our sun in the deep shadows of space. We'll connect with the astronomers on the quest to uncover this theoretical world, as they delve into the mystery of how such a giant planet could exist so far from the Sun—beyond the expected limits for planet formation. Teams from the UK, Germany, and the United States are joining forces to explore this thrilling possibility.