The Humble Origins of Great Comets - ISON Watch [Frank Summers @ STScI Space Science]
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A lecture given by Dr. Frank Summers of the Space Telescope Science Institute, recorded at their facilities in Baltimore, Maryland, on November 11, 2013. Dr. Summers explains that while some comets are referred to as being "great," or even as being a "comet of the century," all of these celestial objects actually come from humble origins. Credit: Space Telescope Science Institute.