A Solar System-Size Headache

Now that astronomers have booted Pluto from the ranks of official planets, what's a planetarium gift shop to do? It's not often that the solar system loses a whole planet, but it did just that on Aug. 24, when the International Astronomical Union (IAU), meeting in Prague, changed the definition of a planet to exclude Pluto, dropping the count of official planets from nine to eight. And while it was the scientific community that had to deal with the impact of the change in their view of the cosmos, some Earth-bound businesses began toting up the dollars-and-cents implications of Pluto's expulsion.

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