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D'Eyncourt wrote:

Uh, no. Pluto is considered a Kuiper Belt Object (and it may not be the biggest one, just the biggest found so far) and is not in Neptune's orbit.

Uh, no.  It's not the biggest found so far.

D'Eyncourt wrote:

ConnertheCat wrote:

D'Eyncourt wrote:

That quote isn't the only criterion, but it is the one which disqualifies Pluto.

The current reason Pluto isn't a planet right now is because Neptune's in it's orbit... guess what, Pluto is also in Neptune's orbit, therefore making it not a planet either.

Uh, no. Pluto is considered a Kuiper Belt Object (and it may not be the biggest one, just the biggest found so far) and is not in Neptune's orbit.

How can Neptune be in Pluto's Orbit, and not vise versa?

Chickenhawk wrote:

because Neptune is bigger, so it is a competing body. Pluto is so much smaller than Neptune that it is not competing with Neptune for supremacy.

Not quite. While there is a part of Pluto's orbit that is inside Neptune's, Pluto's orbit also is significantly elliptical (so that Pluto spends most of its orbit out in the Kuiper Belt) and is tilted out of the plane that the (now) eight planets are in (17.6 degrees) so that when Pluto is closer than Neptune it is also about 800 million miles straight up out of Neptune's orbit.

Or, in short: Pluto is not in Neptune's orbit, nor vice versa.

ConnertheCat wrote:

Strange, how that was the thing that made it not a planet after all.

How do you figure that? I don't know how to make this any clearer but despite your opinion: Pluto and Neptune do not share an orbit. I have to ask: are you capable of thinking about this problem in three dimensions?