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The helical model - our Galaxy is a vortex - YouTube
youtube.com/watch?v=C4V-ooITrws
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Vortex motion: Viral video showing Sun’s motion through galaxy is wrong.
slate.com/blogs/bad_astronomy/2013/03/04/vortex_motion_viral_video_sho..
Explains the flaw in the premise of the video
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Link by eowynfm

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