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[Music]

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after nasa split hubble's third

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servicing mission into two parts to

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allow astronauts to get to hubble as

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soon as possible to replace family

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gyroscopes which are needed to point the

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servicing mission 3a successfully got

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hubble back up and running until

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servicing mission 3b could launch and

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complete all of the planned upgrades to

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hubble

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but even in times of ease the unexpected

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can make an appearance again

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houston uh columbia for eva go ahead

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columbia we're listening

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okay uh as we put on many workstations

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i'm monitoring john's suit and there's a

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large bit of water down here at the

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bottom of the battery i'm fixing to open

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up now

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something unexpected like a spacesuit

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failure

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yeah scooter we're gonna have to get uh

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john out of the suit

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and of course these things always happen

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at the worst time too hubble is without

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a heartbeat

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[Applause]

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servicing missions are what make hubble

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hubble

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for over two decades servicing mission

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astronauts have been able to take

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advantage of hubble's malleable design

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being able to upgrade and refurbish

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parts periodically is how hubble has

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been able to stay on the bleeding edge

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of astronomical science

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and servicing mission 3b was no

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exception to that fact we're providing a

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major upgrade in terms of science

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capability we're adding a new science

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instrument and we're bringing back to

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life the infrared camera and we're

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making important upgrades in terms of

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maintenance we're adding new solar

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arrays and we're changing out the power

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control unit

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forty percent of the highest impact

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subjects that hubble has has uh highest

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impact results that hubble has achieved

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were totally unexpected

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before hubble was launched

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and i expect that five or seven years

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from now hubble will be working on

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subjects that we can't anticipate today

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we don't even know how to ask the

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questions today

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and with the anticipation of those

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unknown discoveries building servicing

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mission 3b was scheduled to launch in

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the spring of 2002 ready to make its

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mark on the stars

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four

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three

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two

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one

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and liftoff of space shuttle columbia to

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broaden our view of the universe through

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houston now controlling the flight of

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columbia the pioneer shuttle headed for

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[Music]

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with the hubble space telescope fully

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grappled it was time to get to work

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the servicing mission was going to

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encompass a wide range of upgrades and

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improvements so every minute of this 12

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day mission was meticulously planned in

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order to complete the five scheduled

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spacewalks

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first up replaced the old solar rays

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with the new and improved version 3 of

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the solar array system

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these new solar arrays were rigid and

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didn't roll up like previous designs

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being more robust it made hubble's power

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intake increase by about 20 to 30

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percent

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solar ray 3 has passed its functional

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test and ready to support next on the

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list replacing the power control unit

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this is hubble's power switching station

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responsible for distributing all the

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electricity generated by the arrays

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batteries and sending it to the other

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parts of the telescope

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and in order for the power control unit

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to be replaced it required hubble to be

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completely powered down for the first

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time

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and one of the cardinal rules in the

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business of space is if it's working

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well

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during the systematic shutdown process

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astronauts john grunsfeld and rick

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lenahan were suiting up to tackle the

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however john's spacesuit began to take

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on water from the liquid coolant system

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not the most ideal situation to happen

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right before stepping out into the cold

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void of space

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with only a certain amount of time to

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react since parts of hubble were already

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shut down grunsfeld's crewmates quickly

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resized another spacesuit in order to

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get the spacewalker out in time before

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the whole spacewalk had to be canceled

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and the late but hopefully powerful

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start

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with things back on track the heart of

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hubble the power control unit was

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successfully changed out after a

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meticulous seven hours spacewalk

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[Music]

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next was to install the advanced camera

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for surveys this camera would allow

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hubble to capture wider vistas of the

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universe at a higher resolution than

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ever before

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allowing us to study weather patterns on

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other planets and understand how the

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universe evolved

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and finally the astronauts of servicing

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mission 3b were able to bring one of

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hubble's most critical instruments

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called mikmos back to life after it had

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been dormant for two years

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they achieved this by installing a cryo

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cooler for its infrared detectors once

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again unleashing hubble's power to peer

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into the invisible infrared universe

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servicing mission 3b proved that nasa

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can take on the unexpected head-on as a

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team accomplishing historical strides in

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our understanding of the universe around

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us

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and from the crew of stf-109

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we've been humble well on its new

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journey with its new tools to explore