Schwarzschild himself thought it not to be physical.

史瓦西他自己认为它不是物质的。

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For any object, there is a critical radius, called the Schwarzschild radius, at which its mass will form a black hole.

对于任何一个物体，都存在一个被称为史瓦西半径的临界半径，在这个半径以内的质量将形成一个黑洞。

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The entropy of the non-stationary and slowly changing spherically symmetric Schwarzschild space-time is calculated under local thermal balance.

研究了在视界附近局部热平衡下缓变动态球对称时空的熵。

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CNN's Mallory Simon and Todd Schwarzschild contributed to this report.

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