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HI SUPERSTARS, TRACE HERE! BACK 
IN APRIL WE# 
FOUND HERCULES, AND THIS WEEK 
WE’RE GOING TO USE

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BINOCULARS OR A TELESCOPE TO SEE 
SOMETHING INSIDE# 
HERCULES KEYSTONE - THE GREAT 
GLOBULAR CLUSTER!

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HIT THE DARKNESS FACING WEST 
AFTER 4AM AND# 
LOOK STRAIGHT UP. THE BRIGHTEST 
STAR YOU SEE

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IS VEGA. NEARBY IS THE KEYSTONE 
OF HERCULES! AND# 
RIGHT THERE WE WILL FIND THE 
HERCULES CLUSTER,

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A.K.A. MESSIER 13. A.K.A. NGC# 
6205 - GOT ALL THAT? GREAT.

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GLOBULAR CLUSTERS ARE A . GLOB. 
OF# 
OLD STARS, GRAVITATIONALLY BOUND

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TOGETHER - AND THIS ONE IS THE 
BEST IN THE# 
NORTHERN SKY. M13 IS ABOUT 25 
THOUSAND LIGHT

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YEARS AWAY AND CONTAINS SEVERAL 
HUNDRED# 
THOUSAND STARS! THE STARS AT THE 
CENTER

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OF THIS CLUSTER ARE 500 TIMES 
CLOSER TO EACH# 
OTHER THAN WE ARE TO OUR 
NEIGHBORS. MEANING,

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THE CLOSE STARS WOULD BE AS 
BRIGHT# 
IN THE SKY AS WE SEE PLANETS!

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ASTRONOMERS HAVE MARVELED AT M13 
FOR CENTURIES# 
AND NOW YOU JOIN THEM! KEEP 
LOOKIN’ UP.