最简单的一种黑洞叫做希瓦兹凯尔德黑洞，以一个发现了广义相对论解答的科学家的名字命名。
The simplest type of black holes is the known as Schwarzschild black holes, named after the scientist who discovered this solution of General Relativity.
在物质穿过希瓦兹凯尔德半径，被压挤成单一体之前；x射线会进人太空，因而我们能够发现这种x射线辐射。
The X-rays are sent off into space before the matter crosses the Schwarzschild radius and crashes into the singularity. Thus we can see this X-ray emission.
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