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1 .This is Scientific American's 60-Second Space.I'm Steve Mirsky.Got a minute?
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2 .Poor little Pluto.
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3 .In 2006, astronomers ganged up on it and voted to strip it of its planethood, but other astronomers signed a petition saying they'd ignore that vote.
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4 .Now Pluto itself seems to be fighting back.
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5 .Thanks to the Hubble Space Telescope, we've learned that Pluto has at least five moons, pretty impressive for something that's supposedly not a planet.
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6 .And new research suggests Pluto is just we were taught long ago:
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7 .the largest world orbiting the sun beyond Neptune.
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8 .In 2005, astronomers discovered Pluto's greatest rival, Eris.
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9 .It's three times farther from the sun than Pluto.
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10 .And Eris was thought to be bigger than Pluto, too.
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11 .But that initial estimate may have been wrong.
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12 .Other astronomers have now analyzed methane in Pluto's air.
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13 .Yup, Pluto has an atmosphere again, pretty impressive for something that's supposedly not a planet,
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14 .and the methane suggests Pluto is about 1,471 miles across, versus just 1,445 miles across for Eris.
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15 .The new study appears in the journal Icarus.
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16 .We'll find out its exact diameter in July, 2015, when NASA's first spacecraft to Pluto zips by.
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17 .It'll take lots of pictures, probably find more moons, and hopefully tell us whether Pluto is indeed the king of the underworld, I mean, of the solar system beyond Neptune.
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18 .Thanks for the minute, for Scientific American's 60-Second Space. I'm Steve Mirsky.
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