Definisi planet

1. Benda tersebut berada dalam orbit mengelilingi Matahari
2. Benda tersebut memiliki massa yang cukup agar gravitasinya sendiri mampu mengatasi gaya benda tegar sehingga benda itu mencapai keadaan kesetimbangan hidrostatik (hampir bulat).
3. Benda tersebut telah membersihkan lingkungan di sekitar orbitnya

Sumber: "Sidang Umum IAU 2006: Resolusi 5 dan 6" (PDF). IAU. 24 Agustus 2006. Diakses tanggal 23 Juni 2009.

• What is a planet? -Steven Soter
• Why Planets will never be defined: Robert Roy Britt on the outcome of the IAU's decision
• Nunberg, G. (2006-08-28). "Dwarfing Pluto". NPR. Diakses tanggal 2007-04-13. An examination of the redefinition of Pluto from a linguistic perspective.
• The Pluto Files by Neil deGrasse Tyson The Rise and Fall of America's Favorite Planet
• Q&A New planets proposal Wednesday, 16 August 2006, 13:36 GMT 14:36 UK
• David Jewitt's Kuiper Belt page- Pluto
• Dan Green's webpage: What is a planet?
• What is a Planet? Debate Forces New Definition
• The Flap Over Pluto
• "You Call That a Planet?: How astronomers decide whether a celestial body measures up."
• David Darling. The Universal Book of Astronomy, from the Andromeda Galaxy to the Zone of Avoidance. 2003. John Wiley & Sons Canada (ISBN 0-471-26569-1), p. 394
• Collins Dictionary of Astronomy, 2nd ed. 2000. HarperCollins Publishers (ISBN 0-00-710297-6), p. 312-4.
• Catalogue of Planetary Objects. Version 2006.0 O.V. Zakhozhay, V.A. Zakhozhay, Yu.N. Krugly, 2006
• The New Proposal, Resolution 5, 6 and 7 2006-08-22
• IAU 2006 General Assembly: video-records of the discussion and of the final vote on the Planet definition.
• Boyle, Alan, The Case for Pluto The Case for Pluto Book by MSNBC Science Editor and author of "Cosmic Log"
• Croswell, Dr. Ken "Pluto Question" Pluto Question

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