The colors in this image reflect the intrinsic color of the different stellarpopulations that make up the galaxies.
照片中的颜色反映了妆扮星系的不同星族的固有颜色。
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Analysis about the abundance in different stellarpopulations is a very important subject in study of the structure and chemical evolution of the Galaxy.
Although researchers have yet to learn much about the stellarpopulations within these galaxies, one thing they do know is that "the galaxies are extremely blue," says Robertson.