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hello

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my name is curtis wilkerson and i am a

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quality assurance engineer for the mars

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science laboratory rover

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and this is the jet propulsion

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laboratory spacecraft assembly facility

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this is literally where it all comes

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together

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come on let's go inside when we're

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building a spacecraft

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all of his parts are brought here to the

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clean room for final assembly

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so why do we use a clean room because

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dust particles and other microscopic

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contaminants

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can harm our sensitive equipment and

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optics so we have to remove those

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particles from the air

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also tiny airborne life forms called

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microbes coexist with us

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we have to remove those as well because

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we don't want to visit another planet

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and think we've discovered life

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just to find out we brought it with us

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from earth this clean room is configured

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as a class 10 000 clean room

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that means that within one cubic foot of

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air there can be no more than 10

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000 particles the size of half of a

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micron

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than the width of a human hair

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now if 10 000 sounds like a lot by

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comparison the room that we're standing

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in

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has nearly 500 000 to a million

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particles within one cubic foot

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that are larger than half a micron so

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where do all these particles come from

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well most of them come from us the

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people things like

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skin flakes our hair cosmetics

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even the lint on our clothes when we're

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standing still motionless

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we shed more than a hundred thousand

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particles per minute

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we're also worried about tribal electric

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charging now that's just a fancy way of

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saying static electricity

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you know how it feels when you're

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walking along a carpet you touch a

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doorknob and you get that little shot

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well that is more than 2 000 volts of

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electricity

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that kind of shock can do a lot of

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damage to our electronics and sensitive

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equipment

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so to prevent static electricity and

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contamination we wear a special clean

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room garment you may have noticed

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we call it a bunny suit come on let's

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inside the clean room the air is kept

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clean by a special ventilation system

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on this side of the room air is blown in

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while existing air is sucked out on the

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north side of the room it's then

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recirculated through hepa filters

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and carbon filters before being blown

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back into the clean room

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we also move our heavy equipment with

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large cranes the crane above us

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has a capacity of 15 tons inside the

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clean room we're building the mars

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science laboratory

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the next rover going to mars we have

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four large components in here today

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behind me is the back shell during our

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10-month cruise this will be the home of

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our rover

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it's covered in a white thermal

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protection system right now to protect

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it during entry into the planet

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here we have the descent stage some call

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it the sky crane

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after we detach from the parachute this

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has the responsibility of lowering the

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rover

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with the help of eight retro rockets

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seen in red to a soft landing on the

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surface of mars

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at nearly 16 feet in diameter our cruise

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stage gets us from earth

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to mars with solar panels on the top we

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have power

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antennas pointing towards earth we have

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communication and with the little

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rockets in the corner in red

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we can make small trajectory maneuvers

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during our cruise

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and here's the reason we're going to

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mars the mars science laboratory rover

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the largest rover this planet has ever

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sent to mars

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it's mid-october and right now we're

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doing a lot of electrical testing

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but the closer we get to our launch date

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we'll start adding our wheels

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and our mass with the cameras and then

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the robotic arm that'll really start to

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take form

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once we're finished with all our

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assembly and test we'll pack it up

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and ship it to cape canaveral florida at

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kennedy space center

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we'll go through even more tasks before

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we stack it on a rocket

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and launch it to mars i gotta get back