Quote:
Originally Posted by Ken G
Actually, "for the last hundred year" people have not always distinguished "minor planets" as not being "planets" in the professional literature. Indeed, the term "planetology" includes the study of many more than nine things in our solar system, and references to Titan and Io as "planets" are not hard to find in the literature. I think it would be fairer to say that the debate has existed long before the Pluto decision, and kind of depends on who you ask.
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I didn't mean to imply that there had never been incidents of such usage--and the debate has been going on for decades, I know. But I meant in the context of "Q: How many planets are there? A: Nine."