pluto

IPA/ˈpluːtəʊ/
KK[plˈuto]IPA/ˈpluːtəʊ/

pluto — noun

1. a large round object in space that travels around the Sun at a distance far grea

1.名詞B1
釋義

a large round object in space that travels around the Sun at a distance far greater than Neptune's path. Pluto was treated as a full planet from its discovery in 1930 until 2006, when astronomers reclassified it as a dwarf planet.

例句

Tara showed her younger brother a picture of Pluto taken by a space telescope.

collocation: picture of + [celestial body]

Scientists decided in 2006 that Pluto should be called a dwarf planet.

passive: be called + [classification]

文法句型

Pluto + verb

the dwarf planet Pluto

用法筆記

Pluto is almost always capitalised because it is the name of a specific celestial object. Before 2006, textbooks listed Pluto as the ninth planet; modern materials refer to it as a dwarf planet.

常見錯誤

❌Some astronomers think Pluto is still a planet.
✅Some astronomers disagree with the reclassification of Pluto as a dwarf planet.
💡'dwarf planet' is the official IAU term, not 'small planet'.
❌Pluto is not a planet because it is too small.
✅Pluto is classified as a dwarf planet because it has not cleared its orbital neighbourhood of other objects.
💡size alone is not the only factor.