The Planets and Beyond — Season 1, Episode 5: Planet 9: The Lost World
Documentary • 43 min • 2 seasons, 23 episodes • ★ 8.1/10
Episode synopsis
Astronaut Mike Massimino investigates the possibility of a giant ninth planet at the edge of the solar system; using the latest technology, he reveals the incredible secrets of this mysterious world.
About The Planets and Beyond
The story of the discovery and exploration of the planets, revealing the deepest secrets of our neighbors in space.