A planet is an astronomical body orbiting a star or stellar remnant that

According to the IAU "planets and dwarf planets are two distinct classes of objects", meaning that dwarf planets, despite their name, would not be considered planets.[3]


  1. The Definition of planet is drawn from two separate International Astronomical Union declarations; a formal definition agreed by the IAU in 2006, and an informal working definition established by the IAU in 2001/2003 for objects outside of the Solar System. The official 2006 definition of planet applies only to the Solar System, whereas the 2003 definition applies to planets around other stars. The extrasolar planet issue was deemed too complex to resolve at the 2006 IAU conference.


  1. "IAU 2006 General Assembly: Result of the IAU Resolution votes". International Astronomical Union. 2006. Retrieved on 2009-12-30. 
  2. "Working Group on Extrasolar Planets (WGESP) of the International Astronomical Union". IAU. 2001. Retrieved on 2008-08-23. 
  3. International Astronomical Union (News Release — IAU0603) (2006-08-24). "IAU 2006 General Assembly: Result of the IAU Resolution votes". Press release. Retrieved on 2007-12-31.  (orig link Template:Webarchive)