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The Universe S9E4 — Alien Worlds
8.5
The Universe•Season 9•Episode 4

Alien Worlds

8.5/10 · 35 votesMay 9, 201545 min

Ranked #1 of 5 in Season 9•+0.9 vs season avg

Discussion

The ancients believed that the universe consisted of countless worlds we could not see, and argued endlessly over the nature of these distant, invisible planets and whether they might be inhabited. Until recently many scientists thought we would never discover the truth, believing that extra-solar

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Season 9 Episodes5

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Cast2

David Ackroyd

David Ackroyd

Erik Thompson

Erik Thompson

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Episode Summary

"Alien Worlds" is episode 4 of The Universe season 9. It scored 8.5/10 from 35 votes, ranking #1 of 5 episodes this season (season average 7.6). It aired on May 9, 2015.

Next: E6 · Roman EngineeringBest of Season 9