Pluto and Charon

May 14, 2021
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Yeah, I’mnot sure that they have ever defined at what point does a planet/moon or dwarf planet/moon becomes a double. I guess it would have to with the difference between the geographic center and the barycenter.
 

Catastrophe

"There never was a good war, or a bad peace."
Personally, I think the centre of gravity (barycentre) being outside either object is a major factor. Of course, if they were of equal mass, the cog would be in the middle of the distance between them.

Cat :)
 
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