Last Updated：2025/11/25
Sentence
科学者たちは、太陽の形成時に残った円盤状のガスと塵の雲（原始太陽星雲）の組成を研究して、惑星がどのように形成されたかを解明しようとしている。
Quizzes for review
Scientists study the composition of the solar nebula to understand how the planets formed.
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Scientists study the composition of the solar nebula to understand how the planets formed.
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