NGC 5098/5096 g and r images

Most galaxies in the Universe are found in groups, which have various morphologies and dynamical states. Studying how groups evolve is an important step for our understanding in...宇宙中的绝大多数星系都以星系群形式存在，这类星系群具有多样的形态特征与动力学状态。研究星系群的演化规律，是我们增进认知的重要一环。