Last Updated
：2025/11/22
protoplanetary disk
Noun
Japanese Meaning
原始惑星系円盤: 若い新生星を取り巻く、回転する高密度なガスと塵の円盤で、ここから惑星が形成される天体物理学的現象を指す。
（ plural ）
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(astronomy) A rotating disk of dense gas and dust surrounding a young newly formed star, and from which planets may be formed.
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protoplanetary disk
Astronomers observed spiral structures in the protoplanetary disk encircling the young star.
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Astronomers observed spiral structures in the protoplanetary disk encircling the young star.
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