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Date: 2011-02-20 15:57:28Solar System Comet Planetary science Extinct comet 73P/Schwassmann–Wachmann Schwassmann-Wachmann Minimum orbit intersection distance Comets Asteroids Space | Water vs. Rocks Resources for Earth or Michael F. A’HearnSaturday, November 20, 2010Add to Reading ListSource URL: ssi.orgDownload Document from Source WebsiteFile Size: 222,00 KBShare Document on Facebook |