Here are my criteria for planethood: 1: Size large enough to form a fairly solid spheroid. (This size will differ according to material density) 2: Orbits a star directly, not indirectly such as a natural satellite of a larger non-stellar body. 3: Was never on the H-R diagram during it's "lifetime". (this to exclude neutron stars, white-dwarf cores, black holes and such, that may in fact be some form of "solid". --- Chuck Hards <chuckhards@yahoo.com> wrote:
Jim, IMO, this is a tempest in a teapot. No matter what the criteria are, someone will disagree. Too, there is no "Encyclopaedia Galactica" that spells it out as an Absolute Truth, so even criteria applied by the world's leading authorities is still thus, 'arbitrary'.
If it looks like a duck, quacks like a duck, it's a duck.
Pluto's a planet, Sedna's a planet. Big deal.
--- Jim Gibson <jimgibson00@yahoo.com> wrote:
What criteria do you think should be considered in making such a judgment? Anyone else can answer for that matter.
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