释义 |
〔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 |