英語聽力文摘 人類聽不見的聲音
宇宙中的最低音
It's coming from a black hole in the Perseus Cluster, about two hundred fifty million light years away. A black hole?And outer space?That makes sound?
What’s happening out there is that intergalactic gas has concentrated around a cluster of galaxies, forming a cloud. A massive black hole is sending out jets of particles that crash into the cloud, causing pressure waves to ripple outward.
Some astronomers interpret these as sound waves. Of course, even if you call it sound, it’s too low for anyone to hear. What note is it? They estimate the note to be a “B flat,” about fifty-seven octaves lower than middle C.
Researchers now think that many black holes may produce such waves, which can affect the way galaxies, and even galaxy clusters, behave.
宇宙中的最低音是由距地球約兩億五千萬光年的英仙座星期群中的一個(gè)黑洞發(fā)出的。
那里的星際氣體已集中在星系群周圍形成了云層。一個(gè)巨大的黑洞正在釋放粒子噴流，這些粒子噴流又撞向云層，然后就產(chǎn)生了壓力波向外界發(fā)出潺潺聲的情況。
有些天文學(xué)家把這種波解釋成聲波。當(dāng)然，即使你稱之為聲音，但它也太低了以致沒有人能聽得到。他們估計(jì)這種聲音屬于降B調(diào)。比中央C低57個(gè)八度音階。
研究者們現(xiàn)在認(rèn)為很多黑洞都會(huì)發(fā)出這種可以影響星系甚至是星系群的表現(xiàn)方式。
