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The Sky at Night

Mapping the Milky Way

Duration: 29 minutes

on BBC Four HD

The Gaia space telescope is not just helping scientists create the ultimate star map of the Milky Way. It is also showing our galaxy's past and how it will change in the future. 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.