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SSS 2008-12-04

时间:2010-05-15 07:14来源:互联网 提供网友:木渐浅。   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute.

 

It’s not every day we get a chance to time travel. Other than into the future at the rate of one second per second. But astronomers2 say they’ve done a little traveling into the past. In November of 1572, legendary3 astronomer1 Tycho Brahe peered up at the night sky. He saw what looked like a strangely bright star in the constellation4 Cassiopeia. It was brighter even than the nearby planet Venus. He studied that bright new star for five months, until it faded away. But what Brahe saw wasn’t a new star. It was actually an old star undergoing the brilliantly bright death of a supernova.

 

Scientists at the Subaru Telescope in Japan recently analyzed5 what could be called echoes of this more than 400-year-old event. They published their research in the December 4th issue of the journal Nature. Light from the original supernova bounced off dust particles in the interstellar clouds and eventually reached us here on earth more than four centuries later. Scientists used these echoes to determine that Brahe witnessed a type Ia supernova.

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Cynthia Graber.

 


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1 astronomer DOEyh     
n.天文学家
参考例句:
  • A new star attracted the notice of the astronomer.新发现的一颗星引起了那位天文学家的注意。
  • He is reputed to have been a good astronomer.他以一个优秀的天文学者闻名于世。
2 astronomers 569155f16962e086bd7de77deceefcbd     
n.天文学者,天文学家( astronomer的名词复数 )
参考例句:
  • Astronomers can accurately foretell the date,time,and length of future eclipses. 天文学家能精确地预告未来日食月食的日期、时刻和时长。 来自《简明英汉词典》
  • Astronomers used to ask why only Saturn has rings. 天文学家们过去一直感到奇怪,为什么只有土星有光环。 来自《简明英汉词典》
3 legendary u1Vxg     
adj.传奇(中)的,闻名遐迩的;n.传奇(文学)
参考例句:
  • Legendary stories are passed down from parents to children.传奇故事是由父母传给孩子们的。
  • Odysseus was a legendary Greek hero.奥狄修斯是传说中的希腊英雄。
4 constellation CptzI     
n.星座n.灿烂的一群
参考例句:
  • A constellation is a pattern of stars as seen from the earth. 一个星座只是从地球上看到的某些恒星的一种样子。
  • The Big Dipper is not by itself a constellation. 北斗七星本身不是一个星座。
5 analyzed 483f1acae53789fbee273a644fdcda80     
v.分析( analyze的过去式和过去分词 );分解;解释;对…进行心理分析
参考例句:
  • The doctors analyzed the blood sample for anemia. 医生们分析了贫血的血样。 来自《简明英汉词典》
  • The young man did not analyze the process of his captivation and enrapturement, for love to him was a mystery and could not be analyzed. 这年轻人没有分析自己蛊惑著迷的过程,因为对他来说,爱是个不可分析的迷。 来自《简明英汉词典》
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