Come see us live at the Northern Podcast Festival in Hull, 16 MayHelp us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypodSyzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.On the web: syzygy.fm | Twitter: @syzygypodThings we talked about in this episode:The Northern Podcast Festival in Hull, 16 MayPancake day, a.k.a Shrove TuesdayAngular Momentum and ice skatingSaturn and its ringsEvolution of the Solar SystemPlanetary disks around other starsGalaxy formation and density wavesPhoto of a black hole (see also Syzygy episode 35)Accretion disk