Professor Mike Merrifield discusses globular cluster Messier 55 and the rotation of its stars. More links and info in full description ↓↓↓ Professor Merrifield is an astronomer at the University of Nottingham: https://www.nottingham.ac.uk/physics/people/michael.merrifield PAPER: The internal rotation of globular clusters revealed by Gaia DR2 - https://arxiv.org/abs/1806.02580 More videos with Professor Merrifield: http://bit.ly/Merrifield_Playlist Professor Merrifield on Objectivity: https://www.youtube.com/watch?v=PccGklgNlHs Messier Objects playlist: http://bit.ly/MessierObjects Deep Sky Videos website: http://www.deepskyvideos.com/ Twitter: https://twitter.com/DeepSkyVideos Facebook: http://www.facebook.com/DeepSkyVideos More about the astronomers in our videos: http://www.deepskyvideos.com/pages/contributors.html Supported by the University of Nottingham https://www.nottingham.ac.uk/astronomy/ Back us on Patreon: https://www.patreon.com/deepskyvideos Video by Brady Haran Just a little note: We filmed this in 2018 but it got a little "lost" in the edit queue and is only appearing now in 2021.