Proper motion of Ursa Major (Big Dipper)

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Here's a YouTube I made showing the evolving shape of the Big Dipper over 300,000 years. Present-day is roughly in the middle of the video.
 
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Did you also post this on Cosmoquest?
Or was that a different tony873004? :wink:
 
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In a parallel universe exists another tony873004 and DaveC426913.
 

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