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Message * Articles On Comet Discoverers, including Charles Messier, Jan Van Riebeeck, Yrjö Väisälä, Heinrich Wilhelm Matthäus Olbers, George Ogden Abell, Caroline Herschel, Johannes Hevelius, Carolyn S. Shoemaker, Yuji Hyakutake - 1242757961 - 9781242757969