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[INTENSE MUSIC]

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>>WEISS: It’s our last shot.
It’s the fifth and final time.

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It’s our last shot to extend
Hubble’s life and bring it to

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the apex of it’s scientific
capability.   >>GRUNSFELD: And

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we just have lots of things we
want to repair on Hubble, and

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upgrade on Hubble and not a lot
of time to do it.   >>WEISS: And

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we are going to take up
everything we can take up, and

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on this flight it’s about
twenty-three thousand pounds of

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hardware. >>LECKRONE: This is
going to be a very exciting,

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complicated and challenging
mission. We have seven brave

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astronauts who’ve made a
conscious decision to risk their

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lives in order to continue the
advancement of science that

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Hubble has begun. They’re going
to buy another five, perhaps ten

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more years of lifetime for this
great telescope. 

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>> BURCH: We’ve got a full plate
of things to do. We’ve got major

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science upgrades that 
we are going to do. 

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So, we have two 
new science instruments

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that we are going to
install.   >>GRUNSFELD: We’re

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going to put in the Cosmic
Origins Spectrograph. And this

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is, you know, the fanciest
spectrograph that has ever been

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put into Hubble.  >>LECKRONE:
COS plus Hubble together, will

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be able to observe deeper across
the universe than any other

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instrument of this kind has ever
done before. >>WEISS: We’re

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going to install the Wide Field
Camera 3, Hubble’s new imager.

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>>CHEUNG: Wide Field Camera 3’s
discovery factor is about ten

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times better than the current
instruments that we have on

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Hubble.   One of the beautiful
things about our new camera the

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Wide Field Camera 3 is, it will
be capable of looking further

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out across the universe and
farther back in time, and closer

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to the big bang than any other
camera we’ve ever had on Hubble

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before. >>WEISS: We’re also
going to attempt two repairs of

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the two failed instruments on
board Hubble: the Advanced

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Camera for Surveys and STIS.  
>>LECKRONE: ACS was inserted on

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Hubble in 2002. Before it died,
it was the most heavily used

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instrument on Hubble. And, STIS
was our first black hole hunter

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and it went on to do the first
detection and chemical analysis

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of the atmosphere of a planet
around another star. We want to

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keep on doing that kind of work
when STIS comes back on line.

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>>BURCH: This will be the first
time that we’ve ever done an

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in-situ repair of science
instruments. So this will be a

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big challenge.  >>MASSIMINO: In
fact there is a hundred and ten

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of these very small screws that
we need to remove from the

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instrument in order to gain
access to the board we need to

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replace. And in space, things
float and debris is a real

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issue.   >>LECKRONE: If we’re
successful in repairing these

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two science instruments that
have failed, it will be a real

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triumph for NASA engineering and
will point the way toward our

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ability in the future to repair
instruments in space.   We want

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Hubble to last a while longer as
a spacecraft and since this will

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be our last opportunity to go
service it we’re going to do

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things like change out all the
gyroscopes that help Hubble

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point. We’re going to put in a
new fine guidance sensor. I say

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a "new" fine guidance sensor; in
fact it’s a refurbished fine

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guidance sensor. It’s one that’s
been on Hubble before and been

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brought back to Earth,
refurbished it so it’s a "used"

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fine guidance sensor but a,
"first class." We’re going to

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change out our batteries. We’ve
never put in new batteries since

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Hubble was launched.  >>BURCH:
We have some insulation repair

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work that needs to be done.
>>GREGORY: We’re going to

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install a New Outer Blanket
Layer called a NOBL. Which is a

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solid. It’s a blanket anymore;
it’s a solid sheet that will go

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over the blanket.   And, we’ll
also be installing a soft

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capture mechanism on the aft
bulkhead of Hubble that will

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help facilitate a future mission
to Hubble primarily for the

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purpose of deorbiting it at the
end of it’s useful life.  

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>>LECKRONE: The two repaired
scientific instruments working

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in tandem with the two new
instruments that we are going to

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put on board Hubble in this
mission will enable scientists

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to tackle some of the most
profound issues facing modern

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science, not just astronomy but
physics today. This in my mind

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means that when the astronauts
leave Hubble after Servicing

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Mission 4, it will be at the
absolute apex of its

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capabilities. It will be better
than it’s ever been before. 

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[INTENSE MUSIC]