Horizon Are We Alone in the Universe? (Season 45, Episode 8)
TV Episode | 50 min | Documentary

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Horizon

Are We Alone in the Universe? (Season 45, Episode 8)

TV Episode | 50 min | Documentary

Series exploring topical scientific issues. The search for extra-terrestrial life has been going for 50 years - but there's been a recent breakthrough. Astronomers have discovered a new planet called Gliese 581 c. It is the most Earth-like...See moreSeries exploring topical scientific issues. The search for extra-terrestrial life has been going for 50 years - but there's been a recent breakthrough. Astronomers have discovered a new planet called Gliese 581 c. It is the most Earth-like planet ever found. It orbits a star and may have habitats capable of supporting life. NASA hopes to find 50 more Earth-like planets by the end of the decade, all of which increases the chance that alien life has begun elsewhere. Written by BBC See less

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Cast	+ Add Cast
8 cast members

Name	Known for
Ian Holm Self - Narrator (voice) Self - Narrator (voice) See fewer	The Lord of the Rings: The Fellowship of the Ring (2001)
William J. Borucki Self Self See fewer	NOVA Universe Revealed (2021)
Frank Drake Self (as Dr Frank Drake) Self (as Dr Frank Drake) See fewer	CBS 5 Eyewitness News (1959)
Geoff Marcy Self (as Prof Geoffrey Marcy) Self (as Prof Geoffrey Marcy) See fewer	Extreme Universe (2010)
Sean Raymond Self (as Dr Sean Raymond) Self (as Dr Sean Raymond) See fewer	Nova (1974)
Lynn Rothschild Self (as Dr Lynn Rothschild) Self (as Dr Lynn Rothschild) See fewer	Prophets of Science Fiction (2011)
Seth Shostak Self (as Dr Seth Shostak) Self (as Dr Seth Shostak) See fewer	The Day the Earth Stood Still (2008)
Stephane Udry Self (as Prof Stephane Udry) Self (as Prof Stephane Udry) See fewer	Cielo (2017)