生活英语|美国国家航空航天局发布黑洞的“声音”

Spooky or soothing^{1? You decide.}

这个声音是诡异，还是舒缓？你感觉呢？

This is what a huge black hole in space sounds like.

这就是太空中一个巨大黑洞的 声音。

US space agency Nasa recorded it from the Perseus galaxy^{2 more than 200 million light|years away.}

美国国家航空航天局录下了这个两亿多光年外的英仙座星系黑洞的 声音。

The sound has been edited so it can be heard by human ears.

声音经过编辑合成，使人耳可以听到。

Scientists say its not the actual black hole were hearing

科学家们说，这个声音并非黑洞本身

Dr Rebecca Smethurst, Author of A Brief History of Black Holes

We hear what the sound is actually like from this black hole thats essentially^{3 given off this big burp of energy from the regions around it. So, not the black hole itself, because nothing can escape a black hole. But the regions around the black hole, in this big cluster of galaxies4, the gas is dense5 enough, that you can get this pressure wave, or sound wave, travelling through that gas, and then recreate that pressure wave, which is also very, very, very, low in frequency. But then we pitch it up about 50 octaves so that, you know, humans can actually hear it.}

丽贝卡斯密瑟斯特 博士 《黑洞简史》作者

大家人耳所听到的这个黑洞的声音，本质上其实是黑洞从周围地区释放的一股巨大能量。所以，这个声音并非黑洞本身发出的，由于没任何东西能逃出黑洞。但在黑洞周围的地区，在这个巨大的星系团中，气体密集到足以使重压波或声波从中穿过，让大家能探测到，然后重现这个重压波，但波动频率也很很低。但大家把频率调高了约50个八度，如此才能让人耳听到。