Pluto, in this sense, is the small icy world that goes around the Sun, usually out beyond Neptune. For a long time schoolbooks called it the ninth planet.

Pluto, in this sensePluto，這裡指的is the small icy world that goes around the Sun是繞著太陽轉的一顆小冰球，usually out beyond Neptune通常在海王星更外面。For a long time schoolbooks called it the ninth planet有很長一段時間課本都叫它第九顆行星。

In 2006 astronomers agreed it did not fit their tighter rule for what a planet is, so they classed it as a dwarf planet; though actually, a lot of people still say "planet" out of habit, and the argument never really went quiet. It is dark, far, and slow: one trip around the Sun takes about 248 Earth years.

In 2006 astronomers agreed it did not fit their tighter rule for what a planet is2006年天文學家一致認為它不符合他們對「行星」更嚴格的定義，so they classed it as a dwarf planet所以把它歸類為矮行星；though actually不過其實，a lot of people still say "planet" out of habit很多人還是習慣說「planet」，and the argument never really went quiet這個爭論也從來沒真的平息過。It is dark, far, and slow它很暗、很遠，繞得也很慢：one trip around the Sun takes about 248 Earth years繞太陽一圈大約要248個地球年。

The name is the old name of the Roman god of the underworld (from Greek Plouton). A child, Venetia Burney, is often credited with suggesting that name for the newly found world in 1930, because it was so far and so dim.

The name is the old name of the Roman god of the underworld這個名字是羅馬冥界之神的古名（from Greek Plouton來自希臘文的Plouton）。A child, Venetia Burney一個小女孩，Venetia Burney，is often credited with suggesting that name for the newly found world in 1930通常被認為是1930年為這顆新發現的星球提議這個名字的人，because it was so far and so dim因為它又遠又暗。

English also has a Disney dog called Pluto, and the god himself — same spelling, different things. This entry is the one in the sky.

English also has a Disney dog called Pluto英文裡還有一隻叫Pluto的迪士尼狗，and the god himself還有那位神本身——same spelling, different things拼法一樣，但是不同的東西。This entry is the one in the sky這一條講的是天上那顆。