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WELCOME TO SPACE TO GROUND, YOUR WEEKLY LOOK
AT WHAT'S HAPPENING ON BOARD I-S-S.

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I'M DAN HUOT.

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SPACEX'S DRAGON CARGO CRAFT RETURNED TO EARTH
THIS WEEK COMPLETING THE COMPANY'S THIRD RESUPPLY

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MISSION.

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ON SUNDAY, IT WAS REMOVED FROM THE EARTH FACING
SIDE OF THE HARMONY NODE BY THE STATION'S

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ROBOTIC ARM AFTER BEING DOCKED FOR A MONTH.

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JUST HOURS LATER, IT SPLASHED DOWN IN THE
PACIFIC, RETURNING APPROXIMATELY 3500 POUNDS

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OF CARGO AND SCIENCE SAMPLES.

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THE NEXT TRIO TO HEAD TO THE STATION IS DOWN
IN BAIKONUR, KAZAKHSTAN IN THEIR FINAL WEEK

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OF PREPARATION.

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REID WISEMAN, MAX SURAEV AND ALEXANDER GERST
CONDUCTED THEIR FINAL SUIT FIT CHECKS AND

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TOOK PART IN CEREMONIAL ACTIVITIES, SUCH AS
RAISING THEIR RESPECTIVE COUNTRY'S FLAGS AND

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A TRADITIONAL TREE PLANTING.

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THE THREE ARE SCHEDULED TO LAUNCH ON WEDNESDAY,
MAY 28.

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COMMANDER STEVE SWANSON HAS BEEN WORKING ON
THE RESIST TUBULE EXPERIMENT THIS WEEK.

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IT'S A BIOLOGICAL SCIENCE STUDY TAKING PLACE
TO CLARIFY THE MECHANISM OF GRAVITY RESISTANCE

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IN PLANTS.

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GRAVITY RESISTANCE PLAYED AN IMPORTANT ROLE
IN THE ESTABLISHMENT OF LAND BASED PLANTS

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SOME 450 MILLION YEARS AGO.

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BETTER UNDERSTANDING THIS MECHANISM WILL BE
INSTRUMENTAL IN ENABLING EFFICIENT PLANT PRODUCTION

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IN MICROGRAVITY, A KEY CAPABILITY FOR SUSTAINING
HUMAN LIFE IN SPACE.

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THIS WEEK'S SOCIAL MEDIA QUESTION COMES FROM
THE ROCKET SCIENCE CLUB AT DUGGAN MIDDLE SCHOOL.

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THEY ASK "HOW MUCH THRUST DOES IT TAKE TO
LAUNCH A SOYUZ?"

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WELL LIKE MOST ROCKETS, THE SOYUZ OPERATES
IN STAGES.

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THE FIRST STAGE CONSISTS OF FOUR STRAP-ON
BOOSTERS AND A CENTRAL CORE ENGINE WHICH INITALLY

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PROVIDE OVER NINE HUNDRED THIRTY THOUSAND
POUNDS OF THRUST.

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AFTER ALMOST TWO MINUTES, THE STRAP ON BOOSTERS
FALL OFF AND THE CORE STAGE CONTINUES TO BURN

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PROVIDING BETWEEN ONE HUDNRED SEVENTY-EIGHT
THOUSAND AND TWO HUNDRED TWENTY-TWO THOUSAND

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POUNDS.

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FINALLY, THE THIRD STAGE PROVIDES JUST UNDER
SIXTY-SEVEN THOUSAND POUNDS OF THRUST.

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AND THAT'S THE SIMPLIFIED ANSWER...