Overview: This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe.
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First Air Date: Jan 15, 2015Last Air date: Dec 24, 2015Season: 1 SeasonEpisode: 46 EpisodeRuntime: 12 minutesQuality: HDIMDb: 8.00 / 10 by 1 usersPopularity: 5.683Language: English