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Stargazing: The case for Pluto

Astronomers using the Hubble Telescope have recently discovered Pluto’s fifth moon.

BY WAYNE HARRIS-WYRICK Published: August 7, 2012

I have changed my mind about Pluto. I have decided that it should be a planet after all.

Part of the reasoning that went into the new definition of a planet is that by making Pluto a planet, eventually there might be another dozen or so. Many astronomers were uncomfortable with that idea. Planets shouldn’t be so common, they said.

The definition made...

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