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Pluto

Pluto

54 5.5
A small dwarf planet beyond Neptune that orbits the Sun
  • proper noun
  • /ˈpluːtoʊ/
translation icon : Plutón
  • Missions have included visits to every confirmed planet except Pluto, as well as to some planetary satellites along the way.
  • the planet Pluto
  • Pluto and Charon
  • Pluto's orbit

Or are the planets Uranus, Neptune and Pluto, and perhaps even some others.

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Examples

  • Pluto isn't considered a proper planet.

  • When I was a kid, Pluto was a great planet.

  • When we reached Pluto, there was only ice and water on the planet.

    Academic text (1990)
  • I was saying, this rocket should take you as far as Pluto.

  • Is it Earth, Mercury, Pluto or Jupiter?

  • Our course will take us beyond Pluto and back to spacedock.

  • Locked in the outer reaches of the Solar System, Pluto has received from us only a little attention.

    Academic text (2004)
  • As measurements of Pluto's size got better and better, the planet kept getting smaller and smaller.

    Academic text (2002)
  • And you know about the Kuiper Belt because it's why Pluto was demoted, right?

  • Scientists believe that Pluto is covered in a thin layer of ice and has a complex surface.

Synonyms

planet
vsPluto
1.0

A large round body in space that moves around a star

is smaller and given dwarf status, not treated as a main solar body
planetoid
vsPluto
  • Specialized
9 8.4

A small rock in space that orbits the Sun like a tiny planet

is officially classed as small and dwarf rather than a main planet
outer planet
vsPluto
  • Specialized
5 4.2

A large planet that orbits the Sun beyond the asteroid belt, like Jupiter

is smaller and ranked as a dwarf rather than a major body
Kuiper belt object
vsPluto
  • Specialized
1 9.9

A small icy or rocky body that orbits the Sun beyond Neptune

is classified by size and status, not only by being in that region

Surface Forms

Pluto main

Etymology

Pluto for the dwarf planet comes from the Roman god Ploutōn, whose name comes from Greek ploutos meaning 'wealth', because the underworld was thought to hold hidden riches; that's why this cold, distant world was given that powerful ancient name.