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黑洞有巨大的引力场,以至于光也无法从它那里逃逸,所以,也就不会有人看到它。它不仅不可见,而且还能吞噬所有靠近它的物质。黑洞只有在靠近另外一颗恒星时才会被探测到。黑洞强大的引力将它附近恒星的气流高速拉到自己身上,它就像一口无底的深井,吸着四周的一切。气体向黑洞倾泄,在黑洞周围形成一个旋涡叫吸积盘。气体间强烈的摩擦使旋转的气体变热并发出强光,最热的部分达到1亿摄氏度,这些气体在坠向黑洞时会发出X射线。
The black hole has a huge gravitational field, so that light can not escape from it, so no one can see it. It is not only invisible, but it also swallows everything near it. Black holes only detect when they are near another star. The powerful attraction of a black hole pulls the air of a star near it at a high speed. It is like a bottomless deep well, sucking everything around. The gas dumped into the black hole, forming a vortex called accretion disk around the black hole. The intense friction between the gases heats the rotating gas and emits bright light, the hottest of which reaches 100 million degrees Celsius. These gases emit X-rays when they fall into a black hole.