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A planet, as defined by the International Astronomical Union (IAU), is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.[1]

Appearances

References

  1. International Astronomical Union. 2006. Archived from the original on 2007-10-25. (http://web.archive.org/web/20071025051134/),(http://www.iau2006.org/mirror/www.iau.org/iau0603/index.html. Retrieved on 2008-08-23)

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