Dr Maggie Lieu (from the University of Nottingham) discusses the "anaemic" spiral galaxy M91. More links and info in full description ↓↓↓ Messier Objects playlist: http://bit.ly/MessierObjects Dr Lieu's website: https://maggielieu.com/ M91 on SEDS database: https://www.messier.seds.org/m/m091.html 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