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hi i'm kristen fortson the international

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space station program stowage and

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disposal lead at the johnson space

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center welcome to mission imagination

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i'm very excited to be here today to

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talk to you about the disposal aspect of

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my job because really i like talking

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trash

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do the astronauts generate the same type

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of trash we generate on the ground

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the trash that's generated on the

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international space station is the same

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kind of trash that you would expect to

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be generated by your community and not

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just by your household things that you

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expect to end up in the trash like

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microbial wipes food wrappers do end up

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in the trash other things you might not

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expect is dirty laundry we don't have

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any washing machines on orbit and so

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dirty clothes dirty towels

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socks tennis shoes those also end up in

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the trash

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the international space station and

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that's because there's a lot of moving

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parts up there to keep all the systems

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running to keep space station working

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and because the crew is doing a lot of

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experiments up there so things that end

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up in the trash because of that include

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fans filters experiment pieces finally

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what ultimately ends up in the trash

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human solid and liquid waste

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how does waste management work on the

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international space station

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well first of all you have cargo ships

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that come and deliver cargo they are the

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same ships that we use to get rid of the

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trash cargo ships come to the

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international space station about once

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every three or four months which means

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you're to have three or four months of

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trash building up on the space station

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that means that you have to have a

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designated area to stow the trash after

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we unload cargo from the visiting

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vehicle we then backfill it with trash

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and once the vehicle is full of trash we

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shut the hatch

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unbirth it from the international space

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station and then it deorbits and burns

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up in the atmosphere so next time you're

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wishing on a falling star

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it might be falling trash it's still

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science

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what is the stowage and disposal

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department doing to prepare for the

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future journey to mars

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we're having to re-look at the whole way

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that we manage disposal

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on a journey to mars the vehicle that

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launches is the only vehicle involved

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which means once you launch and all the

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way on your trip to mars you're going to

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be building up trash and you're going to

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have to live with it

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so this means that you need to figure

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out a space where you're going to stow

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the trash so it doesn't get in the way

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of the rest of your stowage and you need

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to figure out a way to contain it so

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that it doesn't start to grow things or

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stink

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now it is time for you to put science

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technology engineering and mathematics

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to work something we do at nasa every

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day good luck on challenge number two