Theage - metallicity relation AMR provides useful clues about the Galactic formation and evolution.年龄--金属丰度关系给出了银河系形成和演化的线索.Galactic surveys show that distant galaxies are not as evenly distributed in space as theory pre...
Galactic surveys show that distant galaxies are not as evenly distributed in space as theory predicts.对银河系的研究表明，遥远星系在太空中的分布并不像理论所预言的那样均匀。Galactic nebulas are masses of diffuse material within our galaxy.银河星云是我们星系中的一团团弥散物...