a mass of gas and dust from which a cluster of galaxies is thought to develop.
单词 | θ1146 |
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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