When comets breakup it can be an emotional time for Astronomers, amateur and professional alike.  Though not like a breakup with a significant other, we get our hopes up that the next comet will be a comet of the century.  We do this because comets are very unpredictable, and any given close approach to Earth could be spectacular….or terrible. Comet ISON is about to pass behind the sun on November 28th, and could potentially break into pieces from the sun’s incredible tidal forces.  In honour of a new potential breakup, here are the top 5 comet breakups in history: #5...