Last Updated
:2025/11/19
astronomical unit
Noun
Japanese Meaning
天文単位:太陽系内の距離を測るための単位で、地球から太陽までの平均距離(約149,597,870,700メートル)を示す
( plural )
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(astronomy) 149,597,870,700 metres, the approximate mean distance from the Earth to the Sun (the semi-major axis of Earth's orbit), (symbol AU), used to measure distances in the solar system.
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astronomical unit
The comet passed within 0.2 astronomical unit of Earth, prompting close observation by astronomers.
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The comet passed within 0.2 astronomical unit of Earth, prompting close observation by astronomers.
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