> 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 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
QED
Alberto Monteiro
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