黑洞是经过恒星引力塌缩而形成的一种质量较大的致密天体，几乎所有的黑洞系统是X射线新星。
Black hole is the high-mass compact object, which is result of the gravity collapse of the star and most of the black hole system is X-ray nova.
银河系中的超新星最有可能是大多数宇宙射线到达地球的来源。
Supernovas in the Milky Way are the likeliest source for most of the cosmic rays reaching Earth.
这个星云里的其它大质量恒星已经走完了它们进化史的最后一章，变成了超新星并爆炸，将含有极高能量的射线及物质撒向浩瀚的宇宙。
Other massive stars in the nebula have raced through their evolution and exploded catastrophically as supernovae, expanding these bubbles into x-ray-brightened superbubbles.
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