> Having Pups Over Pluto And The Planetary Misfits Of > The Kuipers > Yawn. It's so obvious what should be a planet. An object big enough to dominate graviationally its orbital neighbourhood is a planet. Else, it's part of an asteroid belt.
So, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune are planets [obvious]. Pluto is much bigger than the other
... _presently known_ ...
guys that share with it the 3:2 resonance with Neptune, ergo it's a planet. Ceres isn't much bigger than the other big asteroids, so it's not a planet
The mass of Ceres is greater than the mass of all the other asteroids combined.
QED
Alberto Monteiro
/QED
-- Ronn! :)
Ronn Blankenship Instructor of Astronomy/Planetary Science University of Montevallo Montevallo, AL
Disclaimer: Unless specifically stated otherwise, any opinions contained herein are the personal opinions of the author and do not represent the official position of the University of Montevallo.
_______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
