that is one of the things that we are trying to find out with this mission to Pluto. Scientists are trying to figure out what those numbers are that u mentioned. And once they figure that out we will be able to classify if Pluto is a planet or just a rock and same thing goes for the other 2 rocks past Pluto.
How would they do that...measure the diameter of Pluto? Wouldn't that be hard...haha I don't think that they would have to walk the whole length of Pluto and measure it. But how else would they be able to do it?
