VOA慢速英語(yǔ)：未知黑洞增添新信息
- 中英
- 英文
New Information Adds to Understanding of Black Holes
未知黑洞增添新信息
The human eye is unable to see black holes in space. But telescopes with special tools can help find black holes by seeing how they affect nearby stars.
人類的肉眼是不能夠看見(jiàn)太空中的黑洞的。但是，帶有特殊工具的望遠(yuǎn)鏡能夠幫助發(fā)現(xiàn)黑洞，并觀測(cè)他們是如何影響周圍行星的。
In February, the Japanese space agency sent its Astro-H satellite into orbit around the Earth. The satellite’s job was to examine large structures in space, like huge black holes that exist at the center of most galaxies.
今年二月份，日本宇航局發(fā)射Astro-H號(hào)衛(wèi)星進(jìn)入地球附近軌道。該衛(wèi)星的工作是檢測(cè)太空中的大結(jié)構(gòu)，例如存在于銀河中央的巨大黑洞。
Galaxies are large groups of stars. Scientists estimate there are between 100 and 200 billion galaxies in the universe.
銀河是由龐大的星系組成的。科學(xué)家估計(jì)大概有一千億到二千億銀河存在于宇宙中。
The Astro-H satellite fell apart after only a month in space. But in that short time, Astro-H was able to gather important information. It sent back data about the Perseus cluster – a grouping of galaxies in the star constellation Perseus. The Perseus cluster is home to hundreds of galaxies. They are 240 million light years from Earth.
Astro-H衛(wèi)星僅僅用了一個(gè)月就在太空中分離了。但是，在這短時(shí)間里，Astro-H能夠收集重要的信息。它發(fā)射回關(guān)于英仙座星團(tuán)的數(shù)據(jù)---一組英仙座的星團(tuán)。英仙座是成百星系的家。他們距離地球2400萬(wàn)光年。
What are black holes?
什么是黑洞？
Black holes are areas where the pull of gravity is so strong that not even light can escape. Usually they happen after very big, supergiant stars explode. The exploded star turns into something called a “supernova.” It is very bright, but short-lived. Supernovas create the largest explosions in space.
黑洞是一塊因重力太強(qiáng)烈以至于光不能夠逃脫出來(lái)的區(qū)域。通常發(fā)生在非常巨大的超大星爆炸之后。該爆炸的行星變成某種東西，我們稱作“超新星”。它非常的明亮，但是存活期短。超新星在太空中產(chǎn)生巨大的爆炸。
The material remaining after the supernova explosion collapses. Gravity pulls, or crushes, all the matter into a very small space. When light can no longer escape that space, it is known as a black hole.
該物質(zhì)存在于超新星爆炸后的殘骸中。重力拉伸或者是擠壓，所有的物質(zhì)擠進(jìn)一個(gè)非常小的空間里。光再也不能從空間里逃脫出來(lái)，這就是黑洞。
The Japanese satellite Astro-H was carrying an instrument called an X-ray spectrometer. It was able to measure the way gas flows at the center of the Perseus cluster.
日本Astro-H衛(wèi)星攜帶一種叫做X射線 分光儀工具。它能夠測(cè)量在英仙座周圍的大氣是如何流動(dòng)的。
What it found was that the superheated gas at the center of the cluster flowed more calmly than researchers expected. And that told them something about how black holes work, and how galaxies are formed.
他們發(fā)現(xiàn)在英仙座周圍過(guò)熱的大氣平靜的流動(dòng)，比研究人員預(yù)測(cè)的平靜。并且它告知黑洞是如何工作的，星系是如何形成的。
Brian McNamara is an astrophysicist with the University of Waterloo in Canada.
布萊恩·麥克納馬拉是加拿大滑鐵盧大學(xué)的天體物理學(xué)家。
"And that gives us a very precise measurement of how much energy is being pumped into this gas by supermassive black holes, and so it allows us to form a more complete picture of how galaxies evolve, how the stars and the gas that will eventually cool out like rain to form the stars, evolves over cosmic time."
“并且它給了我們一個(gè)非常精確的測(cè)量，吸入該大氣特大質(zhì)量的黑洞需要多少能量，并且它允許我們?nèi)バ纬筛嗟耐暾男行鞘侨绾伟l(fā)展的相關(guān)影像，行星和大氣最終是如何在宇宙時(shí)間里冷卻成為流星雨”
The scientists are also looking at the hot plasma — another kind of matter — and gases that surround galaxies.
科學(xué)家也能夠觀測(cè)熱的等離子體---另一種物質(zhì)---銀河系周圍的氣體。
"This is gas that has not cooled out and condensed out like rain in our atmosphere to form stars, planets, life, for example. So it's the potential for the future, and we're trying to understand what the future destiny of this galaxy and many other galaxies would be."
這種氣體不能夠冷卻和像雨一樣在我們的大氣中濃縮成行星，星球，生命。未來(lái)，是很有潛能的，并且我們?cè)囍ダ斫庠撔窍档拿\(yùn)和許多其他行星將成為什么。
McNamara says that supermassive black holes may change how galaxies form and change over time.
麥克納馬拉說(shuō)：“特大質(zhì)量的黑洞或許改變星系在這段時(shí)間里的形成和改變”
“The energy released by these giant black holes is very tightly coupled to these atmospheres, which is the stuff out of which future stars will form.”
“能量緊密結(jié)合大氣通過(guò)巨大的黑洞釋放，也是未來(lái)星星形成的材料”
And what that means, he says, is that these huge black holes can affect the rate at which a galaxy grows.
這意味著什么呢？他說(shuō)，巨大的黑洞能夠影響星系成長(zhǎng)的速度。
I’m Anne Ball.
安妮 波爾報(bào)道。
The human eye is unable to see black holes in space. But telescopes with special tools can help find black holes by seeing how they affect nearby stars.
In February, the Japanese space agency sent its Astro-H satellite into orbit around the Earth. The satellite’s job was to examine large structures in space, like huge black holes that exist at the center of most galaxies.
Galaxies are large groups of stars. Scientists estimate there are between 100 and 200 billion galaxies in the universe.
The Astro-H satellite fell apart after only a month in space. But in that short time, Astro-H was able to gather important information. It sent back data about the Perseus cluster – a grouping of galaxies in the star constellation Perseus. The Perseus cluster is home to hundreds of galaxies. They are 240 million light years from Earth.
What are black holes?
Black holes are areas where the pull of gravity is so strong that not even light can escape. Usually they happen after very big, supergiant stars explode. The exploded star turns into something called a “supernova.” It is very bright, but short-lived. Supernovas create the largest explosions in space.
The material remaining after the supernova explosion collapses. Gravity pulls, or crushes, all the matter into a very small space. When light can no longer escape that space, it is known as a black hole.
The Japanese satellite Astro-H was carrying an instrument called an X-ray spectrometer. It was able to measure the way gas flows at the center of the Perseus cluster.
What it found was that the superheated gas at the center of the cluster flowed more calmly than researchers expected. And that told them something about how black holes work, and how galaxies are formed.
Brian McNamara is an astrophysicist with the University of Waterloo in Canada.
"And that gives us a very precise measurement of how much energy is being pumped into this gas by supermassive black holes, and so it allows us to form a more complete picture of how galaxies evolve, how the stars and the gas that will eventually cool out like rain to form the stars, evolves over cosmic time."
The scientists are also looking at the hot plasma — another kind of matter — and gases that surround galaxies.
"This is gas that has not cooled out and condensed out like rain in our atmosphere to form stars, planets, life, for example. So it's the potential for the future, and we're trying to understand what the future destiny of this galaxy and many other galaxies would be."
McNamara says that supermassive black holes may change how galaxies form and change over time.
“The energy released by these giant black holes is very tightly coupled to these atmospheres, which is the stuff out of which future stars will form.”
And what that means, he says, is that these huge black holes can affect the rate at which a galaxy grows.
I’m Anne Ball.
_______________________________________________________
Words in This Story
galaxy – n. any one of the very large groups of stars that make up the universe
Perseus cluster – n. the group of galaxies in the star group of Perseus
x-ray spectrometer – n. an instrument used to measure x-rays
cosmic – adj. of, or relating to, the universe or outer space
constellation – n. a group of stars that forms a particular shape in the sky and has been given a name
supergiant – adj. something extremely large
precise – adj. very correct and exact?
eventually – adv. at some later time : in the end?
condensed – adj. reduced to a smaller or dense form
potential – n. a quality that something has that can be developed to make it better?
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