Overview: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?
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First Air Date: Apr 24, 1957Last Air date: Sep 11, 2023Season: 27 SeasonEpisode: 315 EpisodeRuntime: 30:45 minutesQuality: HDIMDb: 2.7 / 10 by 9 usersPopularity: 21.66Language: en
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