The BEST episodes of Space's Deepest Secrets season 3

Every episode of Space's Deepest Secrets season 3, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Space's Deepest Secrets season 3!

The stories of deep-space explorers who are risking their careers, and even their lives, to lead humanity to worlds yet to be seen.

Last Updated: 11/10/2024Network: Science ChannelStatus: Ended
Search for Alien Earths
star
7.47
30 votes

#1 - Search for Alien Earths

Season 3 - Episode 4 - Aired 9/12/2017

Astronomers and researchers are on the hunt for the groundbreaking discovery that confirms extraterrestrial life; using state-of-the-art technology like the Kepler telescope, scientists examine thousands of exoplanets in search of another Earth.

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star
7.38
16 votes

#2 - When Black Holes Collide

Season 3 - Episode 8 - Aired 10/10/2017

An exploration of gravitational waves.

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Expedition Extraterrestrial
star
7.35
20 votes

#3 - Expedition Extraterrestrial

Season 3 - Episode 7 - Aired 10/3/2017

Scientists on the hunt for extraterrestrial life suspect that it might be closer than we think: our very own solar system; using the latest discoveries, experts might at last confirm that our neighbors might harbor alien life.

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star
7.32
22 votes

#4 - Cassini's Grand Finale

Season 3 - Episode 5 - Aired 9/19/2017

Go inside the final moments of NASA's Cassini mission, a 20-year project to explore Saturn and its moons; Cassini revealed the secrets of strange new worlds that could harbor alien life, changing everything we know about our Solar System.

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Inside the New Space Race
star
7.15
20 votes

#5 - Inside the New Space Race

Season 3 - Episode 3 - Aired 9/5/2017

Space entrepreneurs are on a race to transform space travel to create a home for humans beyond Earth. In this twenty-first century Space Race, modern day visionaries as they plan regular rocket launches, space hotels, and colonies on Mars.

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star
7.12
17 votes

#6 - The Sun's Greatest Mysteries

Season 3 - Episode 6 - Aired 9/26/2017

The latest discoveries reveal the mysterious and ever-changing nature of our sun; astronomers are only now beginning to understand the vast power of our giant star, and new ground-breaking investigations show it like never before.

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star
7.00
17 votes

#7 - When Meteors Attack

Season 3 - Episode 2 - Aired 8/29/2017

Meteors are a deadly threat for our planet, but new technology may provide a way for Earth to fight back when they attack. Join experts as they uncover the mysteries behind these fascinating and terrifying celestial objects.

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star
6.56
18 votes

#8 - Hunt for the Hidden Cosmos

Season 3 - Episode 1 - Aired 8/22/2017

New telescope technology has helped astronomers to explore the never-before-seen invisible universe. These modern marvels ushered in a new age of discovery, revealing secrets of greatest enigmas in the cosmos, from giant black holes to supernovas.

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