However, the laws of mechanics do not allow them to exist at all, because the stars near the edge will rotate much slower than the stars near the center.

 
  • 有趣的是,根據力學(xué)定律,這些旋臂是不穩定的,由于外圍恒星比近核心恒星走得慢,最終會(huì )使旋臂結構毀滅。
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