So you could theoretically make a black hole out of nothing but light -- a kugelblitz.

所以理论上你可以只用光来制造黑洞——一个球形闪电。

To make a kugelblitz that small, you'd need to squeeze all of the sunlight that hit Earth last year into a volume 8,000 times smaller than a proton.

要制造这么小的 kugelblitz，您需要将去年撞击地球的所有阳光压缩到比质子小 8,000 倍的体积中。

To get an Earth-mass kugelblitz, we would need all of the light put out over 10 years by all of the stars within 350 light-years of Earth – all squished into a bit of space the size of a mosquito.

为了获得地球质量的球形闪电，我们需要地球 350 光年以内的所有恒星在 10 年内发出的所有光——所有这些光都被压缩到蚊子大小的空间中。