The Planets and Beyond S1E5 — Planet 9: The Lost World
The Planets and Beyond•Season 1•Episode 5

Planet 9: The Lost World

Sep 19, 201743 min
Discussion

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.

Previous episodeE4 · Saturn: Mysteries Among the RingsNext episodeE6 · Pluto: The Secret Science
BestEpisodes
WorstEpisodes
BestSeasons
AllEpisodes

Seasons2

All12

Season 1 Episodes8

Jupiter: King of the Planets stillE1 7.6

Jupiter: King of the Planets

Mars: The Definitive Guide stillE2

Mars: The Definitive Guide

Venus: The Hell Planet stillE3 6.5

Venus: The Hell Planet

Saturn: Mysteries Among the Rings stillE4 6.8

Saturn: Mysteries Among the Rings

Planet 9: The Lost World stillE5Now viewing

Planet 9: The Lost World

Pluto: The Secret Science stillE6

Pluto: The Secret Science

Alien Worlds: Stranger Than Fiction stillE7

Alien Worlds: Stranger Than Fiction

The Moon: Earth's Guardian Angel stillE8

The Moon: Earth's Guardian Angel

Cast1

Michael J. Massimino

Michael J. Massimino

Narrator (voice)

Discussion

0 comments

Join the conversation

Share your take and reply to other fans.

No comments yet

Be the first to share your thoughts on this episode.

Episode Summary

"Planet 9: The Lost World" is episode 5 of The Planets and Beyond season 1. It aired on September 19, 2017.

Next: E6 · Pluto: The Secret ScienceBest of Season 1