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In 2002, Servicing Mission 3B launched with
a big to-do list: repair and upgrade NASA’s

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Hubble Space Telescope.

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Once the telescope was fully grappled, it
was time to get to work.

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First up, replace the old solar arrays with
new and improved versions that increased Hubble's

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power intake by 20 percent.

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Hubble also needed a new Power Control Unit
to distribute and regulate the increased electricity.

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Next up, installation of the Advanced Camera
for Surveys.

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This camera allows Hubble to capture wider
vistas of the universe at a higher resolution

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than ever before.

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Lastly, the astronauts brought one of Hubble's
most critical instruments, called NICMOS,

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back to life after a 2-year dormancy, once
again unleashing Hubble's power to peer into

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the invisible infrared.

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12 days and 5 spacewalks later. Hubble's capabilities
had greatly advanced, allowing the NASA team

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to accomplish historical strides in our understanding
of the universe.