Radio signals received from the galaxy's centre back up the black hole theory.
从该星系中心接收到的无线电信号证实了黑洞理论。
Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe.
最近的发现有力地支持了这样一种理论，即银河系中心，和宇宙中估计存在的1000亿个其他星系中的许多里有一个黑洞。
According to classical theory, at the boundary of a black hole-the so-called event horizon-light can no longer escape.
在经典理论中，在黑洞的边界，即通常所称的事件穹界，光是不能逃逸的。
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