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REMEMBER LAST WEEK WHEN WE FOUND THE SHARED 
STAR ALPHERATZ IN ANDROMEDA?

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KNOWING ALPHERATZ MAKES IT EASY WAY TO FIND 
THE ANDROMEDA GALAXY, THE MOST DISTANT OBJECT

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THAT YOU CAN SEE WITH YOUR BARE EYES.

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HERE S ALPHERATZ IN THE WESTERN SKY AT 11PM.

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REMEMBER ITS AT THE MEETING POINT OF THE GREAT 
SQUARE OF PEGASUS AND ANDROMEDA.

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FROM THERE, LOOK FOR MIRACH [mir-ahk] AND 
MU -- THE SECOND PAIR OF STARS ALONG ANDROMEDA S

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SPIKE.

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FROM THOSE TWO STARS YOU CAN DRAW A SHORT 
LINE AND BAM!

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00:00:27,160 --> 00:00:29,829
THAT FUZZY-LOOKING SPOT IS GALAXY M31 -- ANDROMEDA.

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00:00:29,929 --> 00:00:32,899
5 IT S EVEN BETTER WITH BINOCULARS.

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THE ANDROMEDA GALAXY IS THE CLOSEST LARGE 
SPIRAL GALAXY TO US

12
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HERE IN THE MILKY WAY.

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IT S 40 PERCENT LARGER TOO, AND

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IN ABOUT 4 BILLION YEARS

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ANDROMEDA AND THE MILKY WAY WILL COLLIDE!

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00:00:42,709 --> 00:00:46,279
BUT DON T WORRY, GALAXIES ARE MOSTLY EMPTY 
SPACE, SO IT WON T AFFECT YOUR DISTANT GRANDCHILDREN

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TOO MUCH, BUT I BET THEIR SKIES 
WILL BE FANTASTIC -- SO HOPEFULLY YOU BOTH

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WILL KEEP LOOKING UP!