English Dictionary

dwarf planet

名詞

(astronomy) A world-like planetoid of the Solar system, that is smaller than the classical planets. More specifically, any astronomical body which has a geology defined by hydrostatic equilibrium (and thus has taken the shape a body of water would take, as opposed to a small Solar System body), orbits the Sun (as opposed to a moon), and does not gravitationally dominate other bodies near its orbit (as opposed to a classical planet or, in IAU usage, as opposed to a planet).

日本語の意味

太陽系に存在する、古典的な惑星よりも小型の軌道天体。 / 自らの重力によってほぼ球形を保っているが、周囲の天体を重力で支配しない天体。 / 太陽を公転するが、月などの衛星ではない天体。

As astronomers studied the Kuiper Belt, they discovered a new dwarf planet with a surprisingly complex surface.

天文学者たちがカイパーベルトを研究していると、新たな準惑星（太陽を公転し、球形に近いが軌道近傍を支配しない小さな天体）が見つかり、その表面は驚くほど複雑だった。

意味（1）

(astronomy) A world-like planetoid of the Solar system, that is smaller than the classical planets. More specifically, any astronomical body which has a geology defined by hydrostatic equilibrium (and thus has taken the shape a body of water would take, as opposed to a small Solar System body), orbits the Sun (as opposed to a moon), and does not gravitationally dominate other bodies near its orbit (as opposed to a classical planet or, in IAU usage, as opposed to a planet).

A member of the Fomor Belt, Bres is a dwarf planet with no atmosphere.

dwarf planets （ plural ）