How the Universe Works
Season 5 Episode 2 - Mystery of Planet 9
8.3 ?
2010
Documentary
Scientists have discovered a mysterious ninth planet on the very edge of our solar system. Ten times the size of Earth, this strange world could have moons with extraterrestrial life.
Episodes in Season 5
1
Most Amazing Discoveries
42 min
2
Mystery of Planet 9
42 min
NOW PLAYING
3
Black Holes: The Secret Origin
42 min
4
Secret History of Pluto
42 min
5
Stars That Kill
42 min
6
The Universe's Deadliest
42 min
7
Life and Death on the Red Planet
42 min
8
The Dark Matter Enigma
42 min
9
Strangest Alien Worlds
42 min
