| 单词 | 星群 |
| 释义 | 〔supergalaxy〕A very large group of galaxies.超星系：一组巨大的星群〔Hyades〕A cluster of stars in the constellation Taurus, the five brightest of which form a V, supposed by ancient astronomers to indicate rain when they rose with the sun.金牛座之五星群：金牛座的一组星，其中最亮的五颗呈V字形排列，古代天文学家认为，当它们同太阳一起升起时预示着要下雨〔galaxy〕Any of numerous large-scale aggregates of stars, gas, and dust that constitute the universe, containing an average of 100 billion (1011) solar masses and ranging in diameter from 1,500 to 300,000 light-years. Also called nebula 星系，星群：组成天体的大量大规模的星、气或尘埃的聚集物，包括平均100(1011)亿的太阳质量，直径从1,500到300,000光年 也作 nebula〔Rigel〕A bright double star in the constellation Orion.参宿七，猎户座β：猎户座星群中的一颗明亮的双星 |
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