[upbeat music]
- "OUR WORLD."
- HEY, EVERYBODY.
I'M LILY, AND THIS IS "OUR WORLD."
I JUST GOT BACK FROM PLAYING WITH MY FRIENDS,
AND BOY, DID I HAVE A GOOD TIME.
BUT NOW I HAVE TO FINISH MY CHORES AROUND THE HOUSE.
WHEN I'M CLEANING UP MY ROOM
AND PUTTING EVERYTHING BACK IN ITS PLACE,
I LIKE TO PRETEND THAT I'M PUTTING TOGETHER
PIECES OF THE INTERNATIONAL SPACE STATION,
OR WHEN I'M PICKING UP TRASH FROM AROUND THE HOUSE,
I'M CLEANING UP TRASH FROM OUTSIDE THE I.S.S.,
OR WHEN I'M VACUUMING,
I'M DOING SOME KIND OF COOL SCIENCE RESEARCH.
WHOA!
BUT TO DO MANY OF THOSE THINGS IN SPACE,
I WOULD HAVE TO DO A SPACEWALK.
A SPACEWALK IS WHEN ASTRONAUTS
GO OUTSIDE THEIR SPACECRAFT TO WORK OR EXPLORE.
AND WHEN ASTRONAUTS GO ON THEIR SPACEWALKS,
THEY HAVE TO BRING ALL THEIR TOOLS WITH THEM.
HERE, LET'S WATCH THIS VIDEO I RECORDED FROM NASA TV.
THIS IS ASTRONAUT SANDY MAGNUS,
TALKING ABOUT TOOLS ASTRONAUTS USE.
- WELL, WE'VE GOT THESE PEOPLE,
AND THEY'RE IN THEIR SPACE SUITS,
THEIR ONE-PERSON SPACESHIPS.
AND THEY NEED THEIR TOOLS.
HOW ARE WE GONNA HAVE THEM CARRY THEIR TOOLS?
'CAUSE YOU CAN'T REALLY CARRY THEM IN YOUR HANDS
'CAUSE OUR HANDS ARE KIND OF OUR FEET UP HERE.
WE USE THEM TO MOVE AROUND IN.
AND SO IT TURNS OUT THAT THEY BUILT A SYSTEM
THAT ATTACHES TO THE FRONT OF THE SPACE SUIT RIGHT HERE,
AND IT HAS ALL OF OUR TOOLS.
AND IT LOOKS SOMETHING LIKE THIS.
AND IT GOES ABOUT RIGHT HERE.
AS YOU CAN SEE, IT'S VERY, VERY BIG,
AND THERE'S LOTS OF STUFF ON HERE.
WE'VE GOT A DRILL, OR WE CALL IT A PISTOL-GRIP TOOL.
IT'S LIKE A SCREWDRIVER WITH A BATTERY,
SO YOU CAN UNFASTEN BOLTS QUICKLY.
AND EVERYTHING'S TETHERED.
- DO YOU KNOW WHAT A TETHER IS?
I DIDN'T EITHER, SO I LOOKED IT UP.
BASICALLY, IT'S SOMETHING THAT HELPS HOLD SOMETHING ELSE
IN PLACE.
SO IT'S LIKE THIS BIG KEYCHAIN.
YOU CAN HOOK IT TO PLACES LIKE A BELT,
AND THE KEYS WON'T GET AWAY FROM YOU,
JUST LIKE THE TETHERS THE ASTRONAUTS USE
KEEP THEIR TOOLS RIGHT WHERE THEY NEED THEM.
- WE TAKE EXTRA TETHERS SO THAT WE CAN PICK UP THINGS
AND ATTACH THEM TO US.
WE HAVE A TRASH BAG,
'CAUSE YOU CAN'T JUST THROW THINGS INTO--
YOU KNOW, INTO THE VACUUM OF SPACE.
YOU HAVE TO BRING IT ALL INSIDE THE THROW IT IN.
- ANOTHER CHORE I HAVE TO DO SOMETIMES
IS TO PICK UP STICKS AND TRASH IN THE YARD.
BUT I ALWAYS MAKE SURE I HAVE ON GLOVES
SO I DON'T HURT MYSELF ON A SHARP STICK
AND TO KEEP MY HANDS NICE AND WARM.
ASTRONAUTS WEAR GLOVES TOO,
BUT THEY'RE A LITTLE BIT DIFFERENT THAN MINE.
- AND THE ENGINEERS HAD TO THINK ABOUT THIS,
IS HOW TO DESIGN A PAIR OF GLOVES
THAT WILL PROTECT YOU BUT YET BE THIN ENOUGH
THAT YOU CAN FEEL WHAT YOU'RE DOING.
AND IT TURNS OUT THAT GLOVES
WERE ONE OF THE TRICKIEST THINGS TO DESIGN,
PRIMARILY BECAUSE THEY WERE SO IMPORTANT,
BUT IF YOU'VE EVER LOOKED AT YOUR HAND
AND REALLY THOUGHT ABOUT HOW YOUR FINGERS MOVE
AND ALL THE BONES AND MUSCLES
AND THE COMPLEXITY OF A HUMAN HAND,
IT'S REALLY HARD TO RE-CREATE THAT IN AN ENGINEERING WORLD.
AND SO THE GLOVES ENDED UP BEING THE HARDEST THING
TO CREATE.
AS YOU CAN SEE,
THE GLOVE HAS A LITTLE BIT DIFFERENT MATERIAL ON THE HAND,
AND THAT'S SO THAT WE CAN GET A LITTLE BIT OF A TACTILE FEEL
WHEN WE'RE WEARING THE GLOVES.
- TACTILE?
HEY, MOM, WHAT DOES TACTILE MEAN?
- TACTILE HAS TO DO WITH THE SENSE OF TOUCH, LILY.
- OH.
SO I GUESS THAT MEANS THE ASTRONAUTS
CAN SORT OF FEEL WHATEVER THEY'RE WORKING ON
THROUGH THEIR GLOVES.
THAT COULD MAKE THINGS EASIER.
- THEY'RE A LITTLE BIT THINNER.
BUT THEY STILL HAVE ALL OF THE PROTECTION ON THEM
THAT THEY NEED TO PROTECT US FROM THE VACUUM OF SPACE
AS WELL AS TEMPERATURES.
THEY PUT SPECIAL HEATERS IN THERE TO PROTECT OUR FINGERS.
I KNOW--I DON'T KNOW ABOUT YOU GUYS,
BUT I ALWAYS GET COLD HANDS,
SO I'M GLAD THERE ARE SPECIAL HEATERS IN HERE.
AND THEY CAN BE SIZED--
THEY ACTUALLY TOOK A MOLD OF MY HAND TO MAKE MY GLOVES.
IT WAS KIND OF A FUN EXPERIENCE.
THEY TOOK MY HAND AND THEY PUT IT IN SOME GOOP
AND MADE A THREE-DIMENSIONAL MOLD OF MY HAND
AND THEN DID A BUNCH OF MEASUREMENTS OF ALL MY FINGERS,
AND THEN THEY CUSTOM-MADE THE GLOVE
SO THAT IT FIT MY HAND.
AND THAT'S REALLY HOW IMPORTANT IT IS
TO HAVE A GOOD PAIR OF GLOVES.
- SO WHAT DID WE LEARN TODAY?
WE LEARNED THAT ASTRONAUTS USE TOOLS TO DO WORK
OUTSIDE THE INTERNATIONAL SPACE STATION.
WE LEARNED HOW ASTRONAUTS KEEP THEIR TOOLS FROM FLOATING AWAY
INTO SPACE.
AND WE LEARNED ABOUT HOW IMPORTANT GLOVES ARE
FOR ASTRONAUTS.
SPEAKING OF GLOVES, I WANT TO MAKE SOME OF MY OWN.
SEE YOU NEXT TIME ON "OUR WORLD."
HEY, MOM, DO WE HAVE ANY GOOP?
- "OUR WORLD."