^ "IAU 2006 General Assembly: Result of the IAU Resolution votes" (Press release). International Astronomical Union (News Release - IAU0603). 24 August 2006. 2007年12月31日閲覧。 (orig link) ^ a b c Mike Brown. “The Dwarf Planets”. CalTech. 2008年9月25日閲覧。 ^ M Woolfson (2000). “The origin and evolution of the solar system”. Astronomy & Geophysics 41: 1.12. doi:10.1046/j.1468-4004.2000.00012.x. ^ NASA Sola
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