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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 robots on the station are testing

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new technologies that could one day send

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repair droids to satellites in space the

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robotic refueling mission picked up

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again this week which uses the station's

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two arms mechanical handyman dexter to

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show how future robots could repair and

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refuel satellites in space and just last

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week the spheres satellites were used to

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test new automated docking and undocking

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techniques a vital skill for any robotic

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mechanic of the future a new flock of

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cubesats also shot away from the station

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this week

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about a dozen of the small satellites

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were from planet labs adding to their

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constellation of earth observing

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satellites which monitor everything from

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deforestation and urbanization to

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natural disaster relief and farming

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harvests in developing nations and two

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other satellites were built by denmark

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to test radio technologies for tracking

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both aircraft and ships on the open sea

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this week we have a fun question from

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connor who wants to know what would

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happen if you popped a water balloon on

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the space station well because of the

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unique environment it'd end up pretty

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much looking the same as before it

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popped

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gravity here on earth constantly pulls

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down on everything which is why water

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looks flat and conforms to whatever

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container it's in

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but in microgravity surface tension

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takes over and water molecules naturally

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pull on each other evenly in all

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directions to form a shape with the

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smallest possible area a sphere makes

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staying hydrated a lot more fun

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that's it for this week keep sending us

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your questions and comments using the