位于射电源中的光学星系。或称诞生某一超新星的星系为该超新星的母星系。
我们没有观测更多AGN母星系的吞并。
“We don’t observe more mergers in the AGN host galaxies,” Cisternas said.
仅就地球的母星系-银河系而言，每年都会出现数十次。
Several dozen a year happen in Earth's home galaxy, the Milky Way, alone.
两个母星系间的碰撞产生里一个冲击波先将物质拉向中心然后使其向外传播形成环状。
The collision between the two parent galaxies produced a shockwave effect that first drew matter into the center and then caused it to propagate outwards in a ring.
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