Season 6 Episodes11
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Ranked #4 of 9 in Season 6•+0.2 vs season avg
New evidence is rewriting the history of our solar system, and using the latest discoveries and cutting-edge tech, experts are investigating if our cosmic neighborhood once featured oversized alien Earths and a second Sun.
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"Dark Secrets of the Solar System" is episode 5 of Space's Deepest Secrets season 6. It scored 8.6/10 from 10 votes, ranking #4 of 9 episodes this season (season average 8.4). It aired on April 16, 2019.