Quote:
Originally posted by mika
So let me make it more clear, very interesting post, indeed.
And it does seem that they need to define what is a moon and what is not.
But with the current definitions I WILL stick with my vote, Earth has one moon 
Because that asteroid is not orbiting earth, and moon in my opinion has to orbit a planet.. Do you agree?
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Actually, you didn't need to make it more clear... I followed what you were saying exactly.
I agree 100% with you.
What do you think about this, though: "
The problem lies in that the gravity of all objects effect all others, so when does a 3 mass system (such as the Sun, Earth, and Moon) make a planet-moon system going around the sun, and when does it be just 2 objects orbiting the Sun (which appears to be the case with the Sun, Moon, and Cruithne)?" Take a bunch of intermediate cases between the two, and at some point people are going to have to question which category it belongs to...