I always felt that since Pluto orbits on a different plane than the rest of the planets it probably didn't form with them when the solar system was formed, but was probably captured in orbit as it passed by, or was a moon that was knocked away or something. So it shouldn't be a planet, by definition.
I don't think size should be an issue. It should be when/how it was formed and its resulting orbit (since they're all on the same plane). Although then each asteroid in the asteroid belt could be a separate planet, so who knows?
no subject
I don't think size should be an issue. It should be when/how it was formed and its resulting orbit (since they're all on the same plane). Although then each asteroid in the asteroid belt could be a separate planet, so who knows?
no subject
Size doesn't matter