0 a dwarf planet that is farther away from the sun than Neptune, and is the second largest dwarf planet in the solar system
1 a large, round mass of matter ninth in order of distance from the sun, after Neptune, considered in the past to be a planet
Astronomers, the scientists who study space and planets, decided that Pluto was too small and too far away from our sun to be called a planet.
The spacecraft are now past Pluto and out of the heliosphere – the area around the Sun.
中文繁体
冥王星（第九大行星，離太陽最遠，比海王星還遠）…
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冥王星（第九大行星，离太阳最远，比海王星还远）…
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Plutón, Pluto…
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Plutão…
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冥王星…
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Pluto, Neptün'den sonra gelen ve Güneş'e en uzak gezegen…
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Pluton…
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Plutó…
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