asteroid

英語（米国） (en-US) 英語（イギリス） (en-GB)

IPA（発音記号）

/ˈæstəɹɔɪd/

名詞

(astronomy) A naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star and often has an irregular shape.

日本語の意味

天体の一種。恒星の周りを公転し、惑星より小さいが彗星ではない自然発生の固体天体。

英語の意味

(astronomy) A naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star and often has an irregular shape.

このボタンはなに？

Scientists tracked an asteroid as it passed within a few lunar distances of Earth.

科学者たちは、その小惑星が月までの距離の数倍以内の近さを通過するのを追跡した。

詳細

意味（1）

(astronomy) A naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star and often has an irregular shape.

意味（2）

(astronomy) In the Solar system, such a body that orbits within the orbit of Jupiter

The orbital planes of asteroids, minor bodies that circle the Sun mainly between the orbits of Mars and Jupiter, are often more tilted ...

詳細

asteroids （ plural ）