About: List of former planets

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This is a list of astronomical objects formerly widely considered planets under any of the various definitions of this word in the history of astronomy. As the definition of planet has evolved, the de facto and de jure definitions of planet have changed over the millennia. As of 2016, there are 8 official planets in the Solar System, and many more exoplanets. Several objects formerly considered exoplanets have been found actually to be stars or brown dwarfs.

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  • This is a list of astronomical objects formerly widely considered planets under any of the various definitions of this word in the history of astronomy. As the definition of planet has evolved, the de facto and de jure definitions of planet have changed over the millennia. As of 2016, there are 8 official planets in the Solar System, and many more exoplanets. Several objects formerly considered exoplanets have been found actually to be stars or brown dwarfs. (en)
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  • This is a list of astronomical objects formerly widely considered planets under any of the various definitions of this word in the history of astronomy. As the definition of planet has evolved, the de facto and de jure definitions of planet have changed over the millennia. As of 2016, there are 8 official planets in the Solar System, and many more exoplanets. Several objects formerly considered exoplanets have been found actually to be stars or brown dwarfs. (en)
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  • List of former planets (en)
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