Professor Mike Merrifield discusses semi-rare circumzenithal arcs and even rarer supralateral arcs. More links and info below ↓ ↓ ↓ More videos with Professor Merrifield: http://bit.ly/Merrifield_Playlist More weather-type videos like this one: http://bit.ly/Weather_Videos HaloSim: https://www.atoptics.co.uk/halo/halfeat.htm Astronomy Picture of the Day featuring arcs by Magnus Edback: https://apod.nasa.gov/apod/ap181221.html Mike on Twitter: https://twitter.com/astromikemerri Brady on Twitter: https://twitter.com/BradyHaran Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/sixtysymbols This project features scientists from The University of Nottingham http://bit.ly/NottsPhysics Patreon: https://www.patreon.com/sixtysymbols Sixty Symbols videos by Brady Haran Editing and animation in this video by Pete McPartlan http://www.bradyharanblog.com Email list: http://eepurl.com/YdjL9