2015-06-05 BBC:星光七纪元-40

 The evidence suggested that billions of tons of matter from a massive star had shrunk to nothing.So what we are left with here is this mind-boggling idea of mass contained in zero volume, and that just make your head spin, but that's what we call a black hole.

It's these very qualities that make some scientists think understanding black holes could hold the key not to death but to the birth of the very first stars.

It's really an awe-inspring story, much more so than the classical creation myths that make it seems so easy.

Scientists had discovered that there was one other place you can find a point of infinite density¹ and zero volume, that's at the instant the universe began, a moment studied by astronomer² Dr Allen Dressler, today it's scientific orthodoxy, but it wasn't always that way.

The idea that the universe had a creation event from a scientific perspective was a revolutionary idea, every bit as remarkable³ a revolution as the idea that the sun and not the earth was the center of the solar system.

1 density   

n.密集，密度，浓度

参考例句：

• The population density of that country is 685 per square mile.那个国家的人口密度为每平方英里685人。
• The region has a very high population density.该地区的人口密度很高。

2 astronomer   

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。

3 remarkable   

adj.显著的，异常的，非凡的，值得注意的

参考例句：

• She has made remarkable headway in her writing skills.她在写作技巧方面有了长足进步。
• These cars are remarkable for the quietness of their engines.这些汽车因发动机没有噪音而不同凡响。