Gas swirling around the center of our Galaxy. The animation shows the gas at different infrared wavelengths, demonstrating ...
一座星系如果被银河系的引力一点点撕裂，我们还能知道它原来是什么模样吗？人马座矮星系就正在经历这样的命运。它的一部分恒星不断被银河系的引力剥离，沿轨道散布开来，形成绵延的“人马座星流”。如今，原来的星系仍留有残余主体，许多恒星却早已远离曾经的家园。人马 ...
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