SSS 2010-12-01
时间：2019-01-08 作者：英语课 分类：Scientific American(十二)月
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute.
To many who stare up at the heavens, the stars may seem simply uncountable. Of course that's not the attitude of astronomers 1. But they've made a discovery that means there are probably a lot more stars in the universe than they thought.
Red dwarfs 3 are stars that are only 10-20 percent as massive as our sun. They're so faint that astronomers weren't able to detect them in any galaxies 4 other than our own Milky 5 Way, and neighboring ones.
So researchers used sensitive instruments at the Keck Observatory 6 in Hawaii. They found faint signatures of these red dwarf 2 stars in eight massive elliptical galaxies relatively 7 close to us—between 50 million and 300 million light years away. And they discovered that these galaxies were home to 20 times as many red dwarfs as there are in the Milky Way.
The finding leads astronomers to believe that there may be three times as many stars in the universe as they'd previously 8 theorized. The research was published in the journal Nature.
And a recently discovered exoplanet orbiting a red dwarf had some Earth-like qualities. Lead researcher Pieter van Dokkum says there could be trillions of Earths orbiting the ubiquitous red dwarfs.
Thanks for the minute. For Scientific American's 60-Second Science, I'm Cynthia Graber.
- 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》
- The dwarf's long arms were not proportional to his height.那侏儒的长臂与他的身高不成比例。
- The dwarf shrugged his shoulders and shook his head. 矮子耸耸肩膀，摇摇头。
- Shakespeare dwarfs other dramatists. 莎士比亚使其他剧作家相形见绌。 来自《简明英汉词典》
- The new building dwarfs all the other buildings in the town. 新大楼使城里所有其他建筑物都显得矮小了。 来自辞典例句
- Quasars are the highly energetic cores of distant galaxies. 类星体是遥远星系的极为活跃的核心体。
- We still don't know how many galaxies there are in the universe. 我们还不知道宇宙中有多少个星系。
- Alexander always has milky coffee at lunchtime.亚历山大总是在午餐时喝掺奶的咖啡。
- I like a hot milky drink at bedtime.我喜欢睡前喝杯热奶饮料。
- Guy's house was close to the observatory.盖伊的房子离天文台很近。
- Officials from Greenwich Observatory have the clock checked twice a day.格林威治天文台的职员们每天对大钟检查两次。
- The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
- The operation was relatively painless.手术相对来说不痛。
- The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
- Let me digress for a moment and explain what had happened previously.让我岔开一会儿，解释原先发生了什么。