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Links to web sites

pluto and the solar system http://www.iau.org/public/themes/pluto/ what is pluto? http://www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-pluto-k4.html In a Planet-or-Not Debate, Some Astronomers Say "Long Live Planet Pluto" http://news.nationalgeographic.com/news/2014/09/140926-pluto-planet-definition-science-debate/ Pluto Not a Planet, Astronomers Rule http://news.nationalgeographic.com/news/2006/08/060824-pluto-planet.html Pluto Is the Biggest Dwarf Planet, After All? http://news.nationalgeographic.com/news/2010/11/101122-science-space-pluto-not-planet-bigger-eris/ Scientists Find Evidence for Ninth Planet in Solar System (planet nine) http://news.nationalgeographic.com/2016/01/150119-new-ninth-planet-solar-system-space/