Article: Pluto demotion prompts questions about solar model.(Science & Technology)(Demotion raises questions about Eugene's solar model)

Byline: Greg Bolt The Register-Guard

Not so long ago, on a bike path far, far away, a solar explorer erected a monument to a planet.

The monument is still out at the far end of Eugene's West Bank Trail, a waist-high pyramid with a BB-size ball at its tip and a brass plaque on the front that says "Pluto." It's an appropriately lonely place for a marker dedicated to what was, until Thursday, the solar system's loneliest planet.

But Pluto is a planet no more. The International Astronomical Union has decreed that Pluto and all its icy, celestially pint-size ilk be cast from the brotherhood of planets, and henceforth the number of our solar club ...

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