On the right, surrounded by blue spiral arms, is spiral galaxy M81.
右边被蓝色旋臂环绕的是旋涡星系m 81。
M82, as this irregular galaxy is also known, was stirred up by a recent pass near large spiral galaxy M81.
大螺旋星系m 81最近给力的“借火”将这个又被称为M82的不规则的星系唤起。
Last go-round, M82's gravity likely raised density waves rippling around M81, resulting in the richness of M81's spiral arms.
最近一个周期中，M82的重力增强了M81周围密度波的脉动，导致M81的旋臂更浓密。
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