If you want #Pluto to be a planet again, shouldn't the #Moon be a planet, too? @AlanStern says yes. http://nyti.ms/1yF44Z5
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Replying to @kchangnyt
@kchangnyt Seems to me that if you want to call earth-moon system a dual planet, the barycenter shouldn't be inside one of them.@AlanStern1 reply 0 retweets 0 likes -
Replying to @Rand_Simberg
@Rand_Simberg@AlanStern is calling all round moons planets. The barycenter is irrelevant.1 reply 0 retweets 0 likes -
Replying to @kchangnyt
@kchangnyt So all it takes is hydrostatic equlibrium? Ceres, too?@AlanStern2 replies 0 retweets 0 likes
Replying to @Rand_Simberg
@Rand_Simberg @AlanStern Yup. 22 planets, I believe.
3:48 PM - 19 Jan 2015
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