What makes a planet a planet?

joel_heat

Size, plus it orbits the sun (or another star) rather than a planet. If our moon orbited the sun it would be a planet Feb 09 05, 11:31 AM

tubaplayer2006

Also needs some sort of an atmosphere Feb 09 05, 1:45 PM

gmackematix

Not really. I went to a party on Uranus and it was dead. Feb 09 05, 7:08 PM

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Is there a tenth planet? Who named planet Earth? What planet is Alf from? What color is the planet Venus?

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