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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 this week nasa celebrated the

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anniversaries of two big events that

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laid the groundwork for everything we do

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in space today on june 3rd 1965 gemini 4

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blasted off and resulted in two

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hallmarks of human space flight the

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first flight overseen by mission control

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houston and the first u.s space walk

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since that day 50 years ago men and

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women in mission control houston have

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supported every u.s human space flight

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and continue to fly the space station

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today

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and spacewalks became one of our most

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powerful tools enabling us to accomplish

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astonishing feats like walking on the

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moon and building and maintaining a

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giant space laboratory

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a major experiment for the one-year crew

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began this week and it's looking to

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tackle one of the biggest outstanding

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issues with living in microgravity when

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living in space all of the body's fluids

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shift around specifically with less in

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the legs and more in the head

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researchers believe that this increased

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fluid level in the head could be

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increasing pressure and causing

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astronauts vision to become impaired

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one year crew members scott kelly and

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mikhail kornienko donned the russian

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chibis device to draw fluids back

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towards their legs so measurements of

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their eyes and blood vessels could be

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taken results from this study may help

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to develop preventative measures against

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lasting changes in vision and eye damage

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this week alice wants to know how long

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it takes to train as an astronaut well

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it takes quite a while but the payoff

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makes it all worth it the first step is

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getting selected and then going through

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astronaut candidate training which takes

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about two years and gives future

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astronauts the skills and knowledge

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needed for formal mission training once

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they get assigned to fly in the space

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station they'll spend roughly two more

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years training around the world on

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everything they'll need to do in space

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including things like experiment

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operations space walking and even how to

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prepare meals in space

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make sure to keep sending your questions