Discussing Comet ISON and just comets in general. Featuring Meghan Gray - https://twitter.com/emeegray - and images from various people, including Pete Lawrence - https://twitter.com/Avertedvision Extra footage from this video: http://youtu.be/APRXAq3Qp8o This is awesome: http://www.solarsystemscope.com/ison/ See our dedicated astronomy channel: http://www.youtube.com/DeepSkyVideos Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/#!/periodicvideos This project features scientists from The University of Nottingham http://www.nottingham.ac.uk/physics/index.aspx Sixty Symbols videos by Brady Haran A run-down of Brady's channels: http://bit.ly/bradychannels