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...
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...