搜索 - 科创

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当坍缩的区域逐渐缩小，由于角动量的守恒，它自转的速度就逐渐加快。当区域变得足够小时，自转的速度足以平衡引力的作用，象我们银河系这样的碟状星系就诞生了。另外一些区域由于没有得到旋转而形成椭圆形星系。

太阳刚形成时，自转很快，磁场很强，内部物质对流很强烈，大量物质被抛射出来，通过沙兹曼机制损失了绝大部分角动量，造成太阳的旋转变慢，角动量特殊分布。太阳形成以后，对星云盘的演化产生了很大的影响。

超新星爆炸会赋予中子星极大的角动量，导致其高速自转，常常可以达到几十毫秒一圈，部分中子星具有极强的磁场，在磁场中运动的电子与质子会发出同步加速辐射与曲率辐射，形成一个沿着中子星磁极射出，随着中子星高速自转而转动的射电波束

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