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释义
the world > the universe > constellation > galaxy > [noun] > protogalaxy (3)
protocluster1953

a mass of gas and dust from which a cluster of galaxies is thought to develop.

protogalaxy1953

A vast mass of gas, contracting under its own gravity but not yet (or not extensively) formed into stars, postulated as a preliminary stage in the…

protocloud1970

a mass of gas and dust from which a galaxy is thought to develop; a protogalaxy.

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更新时间:2024/12/24 4:33:08