WEBVTT

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JOAN CARTAN-HANSEN,HOST:

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THE SUN IS THE MOST

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PERFECTLY ROUND NATURAL OBJECT

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IN THE SOLAR SYSTEM.

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IT'S ALSO REALLY BIG.

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IT HAS A DIAMETER OF ABOUT 1

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POINT FOUR MILLION KILOMETERS OR

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ABOUT 870,000 MILES.

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THAT'S 110 TIMES THE DIAMETER OF

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EARTH.

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IN FACT, IF THE SUN WERE HOLLOW,

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MORE THAN A MILLION EARTHS COULD

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FIT INSIDE IT.

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AND THE SUN DOESN'T HAVE ANY

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DEFINITE BOUNDRY.

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ITS OUTER PARTS GET LESS AND

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LESS DENSE AS YOU MOVE AWAY FROM

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ITS CENTER.

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BECAUSE THE SUN IS NOT A SOLID

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BODY DIFFERENT PARTS OF THE SUN

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ROTATE AT DIFFERENT RATES.

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AT THE EQUATOR THE SUN SPINS

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AROUND ONCE EVERY 25 DAYS BUT AT

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ITS POLES THE SUN ROTATES ONCE

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ON ITS AXIS EVERY 36 DAYS.

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CHECK OUT THE SCIENCE TREK

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WEBSITE FOR MORE INFORMATION

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ABOUT THIS AND ALL OUR SCIENCE

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TOPICS FOR KIDS.

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YOU'LL FIND IT AT

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IDAHOPTV.ORG/SCIENCE TREK

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