The world's astronomers, under the auspices of the International Astronomical Union (IAU), have concluded two years of work defining the difference between "planets" and the smaller "solar system bodies" such as comets and asteroids. If the definition is approved by the astronomers gathered 14-25 August 2006 at the IAU General Assembly in Prague, our Solar System will include 12 planets, with more to come: eight classical planets that dominate the system, three planets in a new and growing category of "plutons" - Pluto-like objects - and Ceres. Pluto remains a planet and is the prototype for the new category of "plutons."
The part of "IAU Resolution 5 for GA-XXVI" that describes the planet definition, states "A planet is a celestial body that (a) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (b) is in orbit around a star, and is neither a star nor a satellite of a planet." Member of the Planet Definition Committee, Richard Binzel says: "Our goal was to find a scientific basis for a new definition of planet and we chose gravity as the determining factor. Nature decides whether or not an object is a planet."
Originally posted by I Have a Sandwich
Dren... the pilgrims were after Columbo... -bus. Anyways, science is about precision, not over complification. Planets/steroids/Meteors. Simple. If this system goes through, we'll have to classify things in the classification. "This is a planet, and this is also a planet by new definition" "But the new one is smaller" "Oh. *Adds more classifications*"
Originally posted by I Have a Sandwich
But what about things like the Borg mothership? What would that be classified as?
Originally posted by Ace of Spades
Oh dear, no more "My very excellent mother just served us nine pizzas."
quote: Originally posted by I Have a Sandwich
But what about things like the Borg mothership? What would that be classified as?
Death?
There should also be defining shapes/characteristics for a space-type-object-thingy to be classified as a planet. Such as landmarks, evidence of water, possibility to support life, orbit pattern, size, ruffly spherical shape, rotation on a set axis, gravitational pull, etc. A GIANT ASTEROID would most likely not qualify as a planet, even if it does meet the size criteria, because an asteroid would most likely be unable to support life or have definite landmarks. Sure, the moon has certain landmarks, but that's mainly because of external objects smashing into it. The moon is NOT a planet because it cannot support life, it has no water, and etc. It is just a big dirt clod orbiting the Earth.
To explain further, landmarks (as by my definition) would be generated by the planet itself. Earth has clearly defined oceans, mountains, etc., caused by volcanic activity and pressure between different tectonic plates. GIANT ASTEROIDS do not have tectonic plates, they are just giant floating rocks. Even Mars has landmarks created by its own forces.
Originally posted by Bill3000
Sorry to rain on your parade, guys, but the IAU requires all planets to be named after deities of creation.
Originally posted by Linkizcool
"I want White Dwarf to enter me."
Originally posted by Meiscool
Such as Meiscool, the creator of Cool..... -aid.