protogalaxies

protogalaxies

美 　英

• 网络原星系

词形变化

复数：protogalaxies  

英汉解释

n.	1. a hypothetical cloud of gas believed to have been formed about 14 billion years ago from dark matter, neutral hydrogen, and helium, from which all the galaxies and stars evolved

例句

During the next five billion years, these protogalaxies continued condensing, forming galaxies in which stars were being born.

接下来的五十亿年间，这些原星系持续凝缩，形成了诞生星球的银河系。