On Tue, 22 Aug 2006 15:43:31 -0700 (PDT), you wrote: >If Pluto crosses the orbit of Neptune (which it does) >then one has to ask if Neptune is a planet since it >hasn't cleared its orbit of debris. Surely Pluto >counts as pretty significant debris if we're stll >asking whether it's a planet or not!?
Neptune mass: 1.0247e26 kg Pluto mass: 1.27e22 kg So to 2 significant figures (if I'm doing my math right) Neptune is 8000 times the mass of Pluto-- or Pluto is around .0125 percent as massive as Saturn. So, in comparison, for a 180 pound person, that amount of "mass" would be around 10 grams, or a handful of hair and a couple of toenail clippings. I wouldn't call that "significant" debris. ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
