Hubble orbiting 350 miles above Earth has confirmed the existence of black holes and deep fields, offered an explanation into how planets are formed, provided proof that quasars reside in galaxies and that our universe is expanding. It has revolutionised our understanding of the cosmos and become a household name, but now it faces the most dramatic moment in its life: the final visit for repairs and fond farewells from astronauts. For two years the astronauts have been training intensely for this vital mission and we follow them as they prepare for the effect of weightlessness in a neutral buoyancy laboratory for up to six hours a day, discover how scientists came up with an ingenious solution on how to remove tiny screws without losing them whilst in diminished gravity, and see the preparations inside the world's largest clean room with its controlled temperature and humidity. The dangerous mission to revive the greatest science tool today is under way and once again Hubble, and all the brilliant scientists and astronauts responsible for her, will make history.
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