Space's Deepest Secrets - Season 6 - Eps 2: Secrets of the Seven Earths
The new discovery of seven alien Earth-like planets in a faraway solar system is a major milestone in our hunt for extraterrestrial life, and experts investigate the secrets of TRAPPIST-1's mysterious worlds to reveal if we're truly alone in the universe.
About Space's Deepest Secrets

Title: Space's Deepest Secrets
First Air Date: 2016-04-26
Last Air Date: 2021-05-12
Status: Returning Series
Rating: 7.3/10 (from 6 votes)
Language: EN
Seasons: 9
Total Episodes: 68
Network: Science
Genres: Documentary
Production Companies: Red Marble Media
Synopsis
A new breed of explorer has taken space travel beyond the moon to unlock and reveal first-ever views of alien worlds and cosmic bodies far beyond anyone's imagination. "Space's Deepest Secrets" shares stories of the men and women who pushed their ingenuity and curiosity to uncover some of the most groundbreaking findings in the history of space exploration. Hourlong episodes cover NASA's New Horizons mission to Pluto, the Hubble Telescope, the twin Voyager explorations, and other past, current and future missions and projects.