This is the second video we've done on M40, also known as Winnecke 4. Featuring Professor Mike Merrifield.
Extra footage from this interview:    • Does the Sun have a longlost twin?  
Here's the new paper mentioned:   / 779224336720953344  
And the earlier paper: http://adsabs.harvard.edu/full/2002JR...
And the new paper on arXiv: http://arxiv.org/abs/1612.00834

Our first M40 video:    • M40  Double Star  Deep Sky Videos  

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The University of Nottingham
and The University of Sheffield.

Video by Brady Haran