[jameshe]

And they excluded Pluto! Guess it's just a faint memory now :(

[dilyevsky]

All planets are aligned within a few degrees actually. Pluto’s orbit is angled quite a bit if i recall correctly (which maybe was one of the reason to kick it out?)

[TeMPOraL]

The main reason is that Pluto is an outlier by size, and then we've discovered many more similarly-sized objects...