->> Well, Mercury is considered a planet and it isn't very much
->> bigger than Plut Pluto is about the same size as the moon.
->> Some argue that our moon is much t big too classify as a
->> proper moon and that earth-moon system should be classified as
->> a double planet.

 DW> This is just playing with words.

Our moon's orbit is always concave towards the sun.  It is for this reason
that some assign the double-planet status to the Earth-Luna system.  I
believe the same is true of the Pluto-Charon system.  It is also probably
true of many pairs of astereoids.

This does muddy the waters, but I think it's more than just a play on words.

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