Last Updated
:2025/12/07
天文単位
Hiragana
てんもんたんい
Noun
Japanese Meaning
天文学で用いられる距離の単位で、主に太陽と地球の平均距離(約1億4960万km)を基準とした長さ。略して「AU」または「天文単位」と表記される。 / 惑星や小天体など、太陽系内の天体までの距離を表す際によく用いられる基準単位。
Easy Japanese Meaning
地球から太陽までのおよそのきょりを一とした長さの単位
Sense(1)
astronomical unit
( canonical )
( romanization )
( romanization )
( hiragana historical )
( hiragana )
Quizzes for review
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天文単位
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An astronomical unit represents the average distance from the Earth to the Sun.
An astronomical unit represents the average distance from the Earth to the Sun.
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天文単位は、地球から太陽までの平均距離を表します。
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