•It must be in orbit around the sun.
•It has a sufficient mass for its own gravity to overcome its natural composure and become a spheroid.
•It has cleared the neighborhood around its orbit.
Does this mean you can launch Louie Anderson into orbit between Earth and Venus and well soon have nine planets again? Perhaps. Yet the definition for a planet, of which there was previously none, has been questioned for several years ever since the discovery of the lauded "10th planet", UB313, discovered in 1999, was pushing the boundaries of what most astronomers considered the rightful definition of a planet. Essentially their question was "If we can name this unknown ball of ice a planet then what cant we name as a planet?" The asteroid Ceres, which was once a planet but was demoted in the 1800's, was being given consideration for the position again recently. Then when talk of naming Pluto's moon, Charon, a planet, scientists world over put their foot down, the line had to be drawn somewhere. An agreement was made that we cannot have 11 planets. Giving planet status to the 2 considered originally would leave open the invitation for hundreds of more cold rocks in the solar system to be applying for planet hood. So the IAU also drafted another resolution, outlining criteria for a second class of celestial bodies.
These Dwarf/Minor planets are celestial bodies that:
•Must orbit the sun.
•Have a sufficient mass for its own gravity to overcome its natural composure and become a spheroid
•Has NOT cleared the neighborhood around its own orbit.
•Is NOT a satellite.
Now Pluto is automatically disqualified as a planet under these new guidelines and demoted to Dwarf/Minor Planet. Yes it does orbit the sun and is semi spherical in shape but it hasn't cleared the neighborhood around its own orbit. It spends a part of its elliptical and highly erratic 248 year journey around the sun inside of Neptune's orbit. So Pluto's erratic behavior and lack of direction in life has cost it its title. Pluto has not only dropped off cosmic primetime lineup it will now take residence in the Dwarf Planet slot with dozens of others that fit into the category.
These new guidelines also disqualify Charon as a potential planet by nudging it into a default category. The "other" category of Solar system asteroids, most of the Trans Neptunian Objects, Comets and other small bodies which constitute the booby prize of celestial existence.
So what does the cost of this celestial downsizing do to the whole of humanity? Textbooks will have to be rewritten. new toys produced and the map of the solar system hanging up on my bedroom wall now has a big X drawn on Pluto. As well as the inevitable senile rants which the members of my generation will be giving to the youth of the world 60 years hence. I can see it now "You kids think you have it bad with 8 planets! In my day we had 9! And they didn't even know what a planet really was!"
Published by Dr. Phil
My work speaks for itself. View profile
In Loving Memory of Pluto the PlanetWeak yet humorous arguments for why Pluto should be allowed to remain a planet in our solar system.
Watching the PlanetsThe planets of our solar system are one of the most exciting parts of the night sky.
Did You Know, Pluto is No Longer a "Planet"?Pluto has been recently under debate for being renamed by a group of astronomers.
The Difference Between Stars and PlanetsThe basic difference between a star and a planet is that a star emits light produced by a nuclear reaction in its core, whereas a planet only shines by reflected light.- Celestial Mass Lab ReportLab Report determining the masses of distant celestial bodies.
- Pluto Still Not a Planet - Shouldn't Size Count?
- MVEMSNU! The Planet Pluto is No More
- Pluto is No Longer One of the Nine Planets
- The Astrology of Dwarf Planets and Asteroids
- Pluto Still a Planet, According to State of Illinois
- Is Pluto Really a Planet or is it Something Else?
- Is Pluto Really a Planet?
- Not the first time we've dropped a planet off the list.
- Pluto's right to be a planet has been debated since its discovery.
- New Plantary categories are now in full effect.

