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"HOUSTON, STATION
ON SPACE TO GROUND."

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WELCOME TO SPACE TO GROUND,
I'M KATHRYN MCLAURIN.

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WE'RE HITTING THE ROAD THIS
SUMMER TO SHOW OFF SOME

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OF THE SIGHTS AT THE
JOHNSON SPACE CENTER.

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TODAY WE'RE IN THE SPACE
VEHICLE MOCKUP FACILITY,

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WHERE EVERY STATION
ASTRONAUT TRAINS

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IN LIFE-SIZE SIMULATORS
BEFORE THEIR STAY IN SPACE.

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THIS WEEK IN SPACE
THOUGH KICKED OFF

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WITH AN EARLY MORNING
RELEASE OF DRAGON.

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SPACEX'S CARGO SHIP WAS
PACKED WITH OVER 4,100 POUNDS

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OF SCIENCE EXPERIMENTS
AND EQUIPMENT

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BY THE EXPEDITION 52 CREW TO
PREPARE FOR ITS DEPARTURE.

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THE HATCH WAS CLOSED AND DRAGON
WAS DETACHED FROM STATION

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OVER THE WEEKEND WITH
THE CREW RELEASING IT

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FROM THE STATION'S
ROBOTIC ARM ON MONDAY.

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DRAGON FLEW AWAY FROM THE
STATION AND EVENTUALLY REENTERED

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THROUGH THE EARTH'S ATMOSPHERE,

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SPLASHING DOWN IN THE
PACIFIC OCEAN FOR THE END

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OF ANOTHER SUCCESSFUL MISSION.

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AND BEING OFF THE PLANET
DIDN'T STOP THE NASA CREW

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FROM CELEBRATING
INDEPENDENCE DAY.

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PEGGY WHITSON AND JACK FISCHER
GOT DRESSED UP FOR THE FOURTH

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OF JULY, DONNING THEIR
MOST PATRIOTIC GEAR

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FOR A QUICK PHOTO SESSION.

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AS A REMINDER, YOU
CAN FOLLOW BOTH

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OF THEM DURING THEIR STAY
ABOARD THE SPACE STATION

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ON TWITTER @ASTROPEGGY
AND @ASTRO2FISH.

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THIS WEEK'S TWITTER QUESTION
COMES FROM MATT READ WHO WANTED

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TO KNOW IF FIREWORKS
COULD WORK IN SPACE.

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THEY COULD, BUT WOULD
LOOK VERY DIFFERENT

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THAN WHAT YOU SEE HERE ON EARTH.

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COMBUSTION EXPERIMENTS
ON THE STATION SHOW

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THAT FLAMES FORM
VERY DIFFERENTLY

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IN A MICROGRAVITY ENVIRONMENT,
CREATING BALLS OF FIRE FREE

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FROM THE CONVECTION PROCESS

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OF HOT AIR RISING WE
HAVE HERE ON EARTH.

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OUTSIDE A SPACECRAFT THOUGH
IN THE VACUUM OF SPACE,

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EXPLODING FIREWORKS WOULD
BE FAR LESS SPECTACULAR

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THAN WHAT YOU SEE ON EARTH,

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WHERE NO ATMOSPHERE MEANS VERY
FEW COLORS BEYOND THE INITIAL

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BURST AND NO SOUND.

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LUCKY FOR THE ASTRONAUTS,

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THE EARTH CAN PROVIDE SOME
PRETTY SPECTACULAR FIREWORKS

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OF ITS OWN.

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KEEP SENDING YOUR
QUESTIONS USING THE HASHTAG