Last Updated：2025/11/19
Sentence
その彗星は地球に約0.2天文単位（天文単位＝約149,597,870,700メートル、地球と太陽の平均距離）まで接近し、天文学者たちによる綿密な観測を促しました。
Quizzes for review
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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Related words
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
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