M4 (Messier 4) is a globular cluster. Its proximity to Earth has made it an interesting target over the years. Messier object playlist: http://bit.ly/MessierObjects Featuring Dr Meghan Gray from the University of Nottingham. More on the people who let us use their images: http://www.deepskyvideos.com/pages/image_contributors.html 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 Editing in this film by Stephen Slater