Planet Definition

Although there is no set scientific definition for planet (from the Greek planetes “wanderers”), as a rule of thumb, a planet: 1) must directly orbit a star or an object that has nuclear fusion; 2) must be small enough that it has not undergone internal nuclear fusion (ie, it is not a star or starlike object); and 3) must be large enough that its self-gravity gives it the general shape of a sphere.
www.infoplease.com/ipa/A0004425.html

There it's easy! One that most people can understand. So please astronomers go home or discuss something else!

Comments from Yahoo 360:

(1 total)

• Sai

okai fine, i will tell you here first

Most Voracious Energies Might Just Seem UbiQuitous

Sunday 28 January 2007 - 11:12AM (CST)