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JAMES: 
ITS BEEN A LITTLE

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OVER 2 YEARS...

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DEAN: 
THE RED PLANET MARS WILL BE AT OPPOSITION!

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JAMES: 
WHEN MARS IS AT OPPOSITION,

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IT'S AT ITS CLOSEST TO US AND THEREFORE IT'S 
AT IT'S BIGGEST AND BRIGHTEST.

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DEAN: 
EVERY 26 MONTHS,

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MARS AND EARTH LINE UP ON THE SAME SIDE OF 
THE SUN.

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BECAUSE MARS ORBIT IS MORE ELLIPTICAL 
THAN OURS,

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THERE ARE TIMES WHERE WE CAN BE MUCH CLOSER 
TO MARS THAN AT OTHERS.

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JAMES: 
FOR EXAMPLE, IN 1877, 1971 AND 2003,

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ALL THOSE OPPOSITIONS OCCURRED BETWEEN AUGUST 
AND SEPTEMBER, AND MARS WAS VERY CLOSE TO

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US.

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DEAN: 
BUT IN 1965, 1997 AND 2012, THOSE OPPOSITIONS

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OCCURRED IN MARCH AND MARS WAS MUCH FURTHER 
AWAY FROM US.

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BUT GET READY.

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NEXT WEEK, 
ON JULY 27TH, MARS WILL BE AT OPPOSITION AGAIN

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AND IT'LL BE A GOOD ONE.

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SO MAKE SURE YOU SEE IT AS YOU

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BOTH: 
KEEP LOOKING UP!