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gbeatty eNotes educator| Certified Educator

It isn't that Pluto died per se. Instead, Pluto is what it always has been—or at least, what it has been for millions, perhaps billions, of years. It's a small, rocky, planetoid. What happened was, after years of debate, in 2006 the International Astronomical Union finally agreed to reclassify Pluto as a non-planet according to new guidelines over what was and wasn't to be considered a planet. That's what led Mike Brown at Cal Tech to say "Pluto is dead."

astrosonuthird | Student

The planet Pluto did not die it is still in our solar system. It is not actually a planet, it is a binary planet.   

 

 

The dog pluto -  Are you taking about the dog Pluto.

 

Sorry! I don't see Micky Mouse.

I don't know anything about thaat dog Pluto!

 

ebbie479 | Student

According to IAU Resolution 5, a planet is:

1. a body that orbits the sun

2. has sufficient mass for it's self-gravity to overcome rigid body forces so that it assumes a nearly round shape

3. has cleared the area around it's orbit

 Because of that last one, Pluto is not classified as a planet. If we were to classify Pluto as a planet, we would also have to classify several dozen, maybe even several hundred, objects just like Pluto as planets.