The Planets (2017)
Planet 9: The Lost World (1x5)
Air date: Sep 19, 2017
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.
- Premiered: Aug 2017
- Episodes: 24
- Followers: 11
- Ended
- Science Channel
- Tuesday at 22