We're discussing the M3 Globular Cluster and its "blue straggler" stars. Messier object playlist: http://bit.ly/MessierObjects Featuring Professor Mike Merrifield from the University of Nottingham. Picture credits: Adam Block - http://caelumobservatory.com/ Fred Espenak - http://astropixels.com/ Deep Sky Videos website: http://www.deepskyvideos.com/ Twitter: https://twitter.com/#!/DeepSkyVideos Facebook: http://www.facebook.com/DeepSkyVideos Flickr: http://www.flickr.com/photos/68847473@N02/ More about the astronomers in our videos: http://www.deepskyvideos.com/pages/contributors.html Videos by Brady Haran Additional editing in this film by Stephen Slater Brady's other channels include: null (Chemistry stuff) null (Physics and astronomy) null (Numbers and maths) null (Science and behind the scenes) null (Food science) null (Big science facilities) null (Favourite scientists) null (Academic look at the Bible) null (Modern language and culture)