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houston station on space to ground

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welcome to space to ground your weekly

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look at what's happening on board the

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international space station i'm dan

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hewitt space suits have some pretty

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complex machinery inside them and just

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like your car on earth they require a

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repair job every now and then

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scott kelly and tim peake swapped out

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one suit's fan pump separator a vital

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part of the life support system which

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had experienced some problems back in

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december it took several hours for them

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to complete the delicate procedure now

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that it's finished the suit is ready for

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final checkouts before it is greenlit

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for future spacewalks it's one of five

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u.s suits currently on board for most of

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us the sun going down means it's almost

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time to sleep but what if the sun sets

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16 times a day

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the circadian rhythm study is looking at

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changes to astronauts biological clocks

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as a result of being in space

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it uses a small device to measure

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changes in a crew member's core

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temperature to give researchers insight

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into their sleep patterns

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getting enough quality sleep is

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important for any job but for astronauts

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it's vital to keep them efficient and

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safe while they operate in some of the

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harshest environments humankind has ever

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traveled

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as we continue to celebrate african

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american history month i'm joined once

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again by nasa astronaut victor glover

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over to you victor

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thanks dan

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every mission gets a lot of help from

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the teams on the ground and there have

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been a select few people in nasa's

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history who were chosen to lead those

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teams

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kwasi ali barucho became one of those

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leaders when he was chosen as a nasa

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flight director

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he came to nasa as a student employee in

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1993 while finishing up his degree at

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mit

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then in 2005 he was selected for nasa's

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newest class of flight directors

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becoming the first african american to

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lead the teams in mission control

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and quatzie was front and center as the

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lead shuttle flight director during

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nasa's final space shuttle mission in

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2011

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one of the biggest moments in the

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agency's history

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thanks victor keep sending us your