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Horizon

2014-2015

Episode 8: Secrets of the Solar System

Duration: 59 minutes

on BBC Four HD

Available for years

Series exploring topical scientific issues. A look at how new planets being discovered are forcing scientists to rewrite the history of our own solar system. Show more

BBC Four HD

About BBC Four

BBC Four reflects arts, music and culture with an ambitious range of intellectually and culturally enriching programmes, taking an expert and in-depth approach to its subjects.