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The Sky at Night

Gaia: A Galactic Revolution

Duration: 29 minutes

on BBC Four HD

How ESA's Gaia Space telescope has been mapping the heavens, from the discovery of wandering black holes to a new age map of the Milky Way. 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.