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it's our last shot it's the fifth and

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final time it's our last shot to extend

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hubble's life and

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bring it to the apex of its scientific

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and we just have lots of things we want

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to repair on hubble and upgrade on

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hubble and not a lot of time to do it

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and we're going to take up everything we

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can take up and on this flight it's

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about 23 000 pounds of hardware

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this is going to be a very exciting

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complicated and challenging mission

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we have seven brave astronauts who made

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a conscious decision to risk their lives

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in order to continue the advancement of

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science that hubble has begun

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they're gonna buy another five perhaps

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ten more years of lifetime for this

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we've got a full plate of things to do

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we've got major science upgrades that

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we're going to do so we have two new

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science instruments that we're going to

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install

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we're going to put in the cosmic origin

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spectrograph

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and this is you know the fanciest

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spectrograph that's ever been put into

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hubble

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to observe deeper across the universe

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than any other

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instrument of this kind has ever done

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before

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well we're going to install the

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whitefield camera 3 hubble's new imager

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wide field camera 3's discovery factor

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is about 10 times better

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than the current instruments that we

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have

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on hubble

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one of the beautiful things about our

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new camera the whitefield camera 3 is it

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will be capable of looking farther out

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across the universe and farther back in

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time and closer to the big bang than any

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other camera we've ever had on hubble

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we're also going to attempt two repairs

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of the two failed instruments on board

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hubble the advanced gamer for surveys

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and stis

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acs was inserted on hubble in 2002

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before it died it was the most heavily

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used instrument on hubble

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and this was our first black hole hunter

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and it went on to do the first detection

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and chemical analysis of the atmosphere

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of a planet around another star we want

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to keep on doing that kind of work once

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this comes back online it must be the

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first time that we've ever done an

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in-situ repair of science instruments so

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of these challenge small screws that we

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need to remove from the instrument in

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order to gain access to the board we

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need to replace

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and in space things float and debris is

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if we're successful in repairing these

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two scientific instruments that have

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failed it will be a real triumph for

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nasa engineering and will point the way

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toward our ability in the future to

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we want hubble to last a while longer as

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a spacecraft and since this will be our

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last opportunity to go service it we're

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going to do things like

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change out all the gyroscopes that help

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hubble point

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we're going to put in a new fine

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guidance sensor

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it's a refurbished fine guide sensor

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it's one that's been on hubble before

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and been brought back to earth

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refurbished it so it's a used fine

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guidance sensor but

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we're going to change out our batteries

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never put in new batteries since someone

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was launched

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we have some insulation repair work that

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needs to be done

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we're going to install a new outer

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blanket layer called a noble which is a

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solid it's not a blanket anymore it's a

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solid sheet that will go over the

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blanket

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and we'll also be installing a soft

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capture mechanism on the af bulkhead of

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hubble that will help facilitate a

97
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future mission to hubble

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primarily for the purpose of de-orbiting

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it at the end of its useful life

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the two repaired scientific instruments

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working in tandem with the two new

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instruments that we're going to put on

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board hubble in this mission will enable

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scientists to tackle some of the most

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profound issues facing modern science

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this in my mind means that when the

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astronauts leave hubble after servicing

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mission four it will be at the absolute