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[Music]

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so

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arriving at the space station

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something i'll never forget is looking

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over my left shoulder out the window in

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the soyuz where it was either a view of

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the earth or blackness of space

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and then all of a sudden i could see a

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solar array getting chills even thinking

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about it right now it was this beautiful

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gold

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massive i mean you don't ever train and

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see a solar array at full scale here and

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so there it was and the russian

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commander sitting to my right

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i had to really pay close attention and

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i was supposed to be too but as soon as

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i saw those solar eyes i broke the

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silence and said wow and he was like

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so

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i was excited

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the freedom of motion inside of the

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space station is huge

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and then working was busy it was

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definitely very busy i got up there when

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a spacex

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dragon spacecraft was docked

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just because there's a lot of science

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that requires return and things have to

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be done in a very specific timeline it

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was very fast-paced immediately

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and the space station is very unique

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because

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on the space station orbit is really a

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continuous freefall

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and because of that you can have some

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very unstable structures that might not

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be able to stay together if you're on

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the ground they can stay together on the

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space station flames behave differently

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because combustion on the ground

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requires drawing in all these rich gases

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into the flame because the hot

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combustion gases go up and away but

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there's no up and away on the space

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station all directions are equal as far

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as that's concerned so that behaves

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differently there's all kinds of

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different phenomena that we can

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experiment with that's why it's a

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wonderful laboratory many many different

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experiments some of those experiments

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actually have to do with us as the test

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subjects because we're trying to

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understand how to have people safely

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travel for longer and longer distances

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too that's just a sub part of all the

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science we're doing on the space station

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some people have talked about at some

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point in the expedition feeling like

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it's time to go home but for me there

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was always another spacewalk or another

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vehicle capture that was coming up so it

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always felt like suddenly i was going

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home and it surprised me

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[Music]

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i'm mark vandehei and i'm a nasa