SSS 2008-07-17
时间：2019-01-08 作者：英语课 分类：Scientific American(七)月
This is Scientific American's 60-Second Science,I'm Steve Mirsky,got a minute?
Our Milky 1 Way galaxy 2 produces only about 10 new stars annually 3. But a galaxy far, far away is experiencing a major baby boom. It’s pumping out up to 4,000 new stars a year, and should become a massive elliptical galaxy. The discovery was announced in the July 10th issue of Astrophysical Journal Letters. The Baby Boom galaxy stood out because of its extreme brightness, a function of all its youthful stars. That star-making actually happened 12.3 billion years ago—that’s how long it took for the light to reach us. And the universe was virtually a baby itself, only about 1.4 billion years old, when the Baby Boom galaxy activity happened. Astronomers 4 don’t know if this is an exceptional case or if most massive elliptical galaxies 5 actually formed so early in the universe’s history.
The discovery also challenges the accepted model for galaxy formation, which has most galaxies slowly bulking up by absorbing pieces of other galaxies, rather than growing internally. Looks like the new finding will be keeping astronomers busy into old age.
Thanks for the minute,for Scientific American's 60-Second Science,I'm Steve Mirsky
- 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。
- The earth is one of the planets in the Galaxy.地球是银河系中的星球之一。
- The company has a galaxy of talent.该公司拥有一批优秀的人才。
- Many migratory birds visit this lake annually.许多候鸟每年到这个湖上作短期逗留。
- They celebrate their wedding anniversary annually.他们每年庆祝一番结婚纪念日。
- 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》