Re: Ceres - The Fifth Planet From The Sun

The difference between Charon and the other things that we call moons is
that the orbit of Charon about Pluto actually goes around a center of
mass that lies outside Pluto. So the new definition calls this a double
planet.

I suspect that there is some Earthnocentrism in this argument. It would
resrtore our Moon to its status as the largest relative to its planet.

--OL

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