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hubble is our premier observatory

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orbiting the earth

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unraveling the mysteries of the universe

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we did five missions

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to upgrade and service the telescope

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hello i'm john grunsfeld nasa astronaut

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you might wonder how did we learn to do

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the complex tasks using all the cool

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tools that we used on the hubble space

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telescope

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[Music]

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one of the things that makes humans

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unique

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and certainly one of the things that

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makes it a lot of fun to work on space

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walks is developing tools

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you know there are other animals that

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use tools but nobody

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in the animal kingdom ever came up with