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"HOUSTON, STATION ON SPACE TO GROUND."

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WELCOME TO SPACE TO GROUND, I’M LEAH CHESHIER.

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THIS WEEK, CHRIS CASSIDY CONTINUED RESEARCH

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INTO HOW THE BODY REPAIRS DNA DAMAGE IN SPACE.

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DUE TO INCREASED EXPOSURE TO RADIATION IN
SPACE,

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DNA DAMAGE CAN HAVE LONG-TERM

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AFFECTS ON ASTRONAUT HEALTH.

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THE GENES IN SPACE-6 EXPERIMENT

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EVALUATES THE ENTIRE DNA REPAIR PROCESS

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BY INDUCING DNA DAMAGES AND ASSESSING

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MUTATION AND REPAIR.

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ON TUESDAY, CASSIDY SET UP

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THE BIOMOLECULE SEQUENCER,

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A DEVICE THAT CAN SEQUENCE

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DNA IN SPACE,

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WITH A NEW FLOW CELL,

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WHERE THE SAMPLES ARE ADDED.

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UNDERSTANDING HOW DNA DAMAGE

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AND REPAIRS OCCUR IN MICROGRAVITY

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CAN CONTRIBUTE TO PROCEDURES

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TO PROTECT ASTRONAUTS NOT ONLY

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ON THE SPACE STATION,

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BUT ALSO ON FUTURE MISSIONS

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TO THE MOON OR MARS.

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IN THE JAPANESE AEROSPACE EXPLORATION AGENCY’S
KIBO MODULE,

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CHRIS CASSIDY WORKED ON HARDWARE

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THAT GIVES US A MUCH CLOSER LOOK

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AT THE THINGS WE CAN’T SEE

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WITH THE NAKED EYE.

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CASSIDY PERFORMED LENS COLLECTION

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FOR  THE CONFOCAL SPACE MICROSCOPY  SETUP AND CLOSEOUT,

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REMOVING THE LENSES FROM

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THE AQUATIC HABITAT IN KIBO

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AND RE-INSTALLING THEM TO

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THE MICROSCOPE SETUP IN

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THE JAPANESE EXPERIMENT MODULE,

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HELPING MAINTAIN THE MICROSCOPE ITSELF.

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AS IT IS CONFOCAL,

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THIS SPECIAL MICROSCOPE BLOCKS OUT

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OUT OF  FOCUS LIGHT,

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PROVIDING A GREATER RESOLUTION

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ON THE SUBJECT OF INTEREST.

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THE CONFOCAL MICROSCOPE ALLOWS

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DATA TO BE OBTAINED REAL-TIME

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ON THE FUNDAMENTAL NATURE

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OF CELLULAR AND TISSUE STRUCTURES AND FUNCTIONS.

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AS WE LOOK FORWARD TO THE WEEKEND ON EARTH,

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IT SEEMS LIKE A GOOD CHANCE TO

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ANSWER NATALIE’S QUESTION ABOUT

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WHAT WEEKENDS ARE LIKE ON THE SPACE STATION.

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LIKE MOST FULL-TIME EMPLOYEES ON EARTH,

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ASTRONAUTS IN SPACE USUALLY

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GET WEEKENDS OFF TOO,

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AND ENJOY TALKING WITH FRIENDS AND FAMILY,

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TAKING PHOTOS OUT THE WINDOW,

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READING, WATCHING MOVIES AND MORE.

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HOWEVER, THERE ARE A COUPLE OF TASKS

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STILL ON THEIR SCHEDULES.

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ASTRONAUTS ARE STILL REQUIRED TO

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WORK OUT FOR ABOUT TWO HOURS EACH DAY,

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AND THEY ALSO TAKE SOME TIME TO TIDY UP

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THEIR HOME IN LOW-EARTH ORBIT.

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KEEP SENDING IN YOUR QUESTIONS