Millions of school textbooks would be rendered obsolete if a draft resolution by a panel of astronomers and historians is adopted. The definition of the word "planet" would be changed which would enlarge the Solar System from nine planets to twelve. Charon, Pluto's moon, along with astral bodies Xena and Ceres, would be classified as planets.
The new definition would be, "an object be massive enough that gravity has formed it into a sphere and that it circles a star and not some other planet." Scientists say there may be a dozen other bodies that could be classified as planets.
Great. I had trouble enough remembering nine.
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