Tag Archives: controversy

What is a planet: problems with the current definition

Yesterday, while eating lunch, I got around to reading the article in SCIENTIFIC AMERICAN “What Is A Planet”, by Steven Soter. The article tries to address the rationale for the new definition of a planet, and why Pluto no longer meets that definition.

I can’t say that I disagree with the definition as presented. The definition is based more or less on the orbital characteristics of a body, how much it sweeps clean of it’s surroundings, and the ratio of the body’s mass as compared to the total mass of all other objects in its orbital zone. These are fairly measurable things and seem to support the categorization as it has been made.

I do have some problems with the definition, however, one scientific, the other semantic.

Read why I think the new definition has problems