The Sky at Night

Season 63 Episode 8: Alien Worlds

Astronomers have found more than 4,000 planets circling stars other than our own. What do we know about these alien worlds and how have we managed to detect them?

Genre:

Documentary, News

Seasons:

70

Episodes:

847

Cast:

Quality:

HD

Duration:

30 min

First Air:

1957

Rating:

8.3