英语听力：2013-10-02 地平线：黑洞吞噬—6
时间：2019-01-23 作者：英语课 分类：探索与发现2013年
英语课
The mystery of what could count for the quasars' extraordinary brightness was the hot topic in astronomy during the 1960s. As astronomers 2 began to grapple with the new enigmatic objects that had been found by the radio telescopes, one astronomer 1, keen to have a crack at the problem, was a young researcher, called Donald Lynden-Bell.
The sky looked totally different in the radio than it looked in the optical. And that was a big problem and the question was what were these things?
While his colleagues were staring down telescopes, Lynden-Bell approached the problem through theory. He wanted to find out how something as small as a quasar could possibly be so bright.
This had an enormous quantity of energy coming out of it and it came from a very small size. Now putting these numbers together, one could already see the mass of the energy required to give the emission 3 was like ten million times the mass of the sun.
But the problem was that quasars are tiny in size, were nothing like the scale of ten million suns. Lynden-Bell realizes there was only one thing that could possibly be so small yet have so much mass--those mathematical anomalies conjured 4 up by theorists that had been predicted but never observed—super-massive black holes.
n.天文学家
- 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。
n.天文学者，天文学家( astronomer的名词复数 )
- 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》
n.发出物，散发物；发出，散发
- Rigorous measures will be taken to reduce the total pollutant emission.采取严格有力措施，降低污染物排放总量。
- Finally,the way to effectively control particulate emission is pointed out.最后，指出有效降低颗粒排放的方向。