Pluto Not a Planet, Astronomers Rule

Posted on August 24, 2006 

Pluto Not a Planet, Astronomers Rule

In a move that’s already generating controversy and will force textbooks to be rewritten, Pluto will now be dubbed a dwarf planet.

But it’s no longer part of an exclusive club, since there are more than 40 of these dwarfs, including the large asteroid Ceres and 2003 UB313, nicknamed Xena—a distant object slightly larger than Pluto discovered by Brown last year.

“We know of 44” dwarf planets so far, Brown said. “We will find hundreds. It’s a very huge category.”

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