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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 Crawford

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Jones traffic picked up in space this

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week has two new vehicles arrived at the

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ISS SpaceX's Dragon resupply ship

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launched early Sunday morning from Cape

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Canaveral Florida and arrived at the

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station on Tuesday flight engineers reid

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wiseman and alexander gerst were at the

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controls of the robotics workstation and

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use the ISS robotic arm to capture the

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dragon while the crew took a break

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ground controllers remotely positioned

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the cargo craft at its docking port on

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the harmony module and then the crew

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secured it in place hatches were opened

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and the crew began unloading the nearly

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two and a half tons of supplies Hardware

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gear and experiments and the second

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vehicle to arrive at the ISS this week

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brought with it three new station

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residents to complete the expedition 41

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crew

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NASA astronaut butch Wilmore and

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cosmonauts alexander samokutyaev and

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yelena serova

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climbed aboard their soyuz tma 14 M

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spacecraft in Baikonur Kazakhstan on

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Thursday the rocket lifted off at 425

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Eastern Time in just six hours and four

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orbits around the earth later the Soyuz

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arrived at the station for docking to

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the poisk module hatches between the two

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spacecraft were open and station

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commander max suraev

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and flight engineers reid wiseman and

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alexander gerst

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welcomed their new crewmates aboard

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Wilmore samokutyaev and serova will live

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and work aboard the station until March

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of next year with all the orbital

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traffic this week we have a very fitting

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Twitter question from Adrian who wants

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to know how a capsule can catch up to

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the ISS when it's moving at 7.7 km/s

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well Adrian think of it like two cars on

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a racetrack the car in the inner lane

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driving the same speed as a car in the

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outer lane will complete a lap quicker

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because it has a shorter distance to

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travel so when an orbital vehicle is

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traveling closer to the Earth's surface

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in a lower orbit it's able to catch up

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with the space station as he gets closer

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to the ISS it can adjust its altitude

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through a series of burns until it

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eventually rendezvous with the station

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keep sending us your questions and

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comments using the hashtag