Eventually mr fang settled at the university of arizona to become a professor of physics , as he wanted , specialising in statistical studies of the extragalactic red shift .

方先生终于在亚利桑那大学安顿下来，成了该校的物理学教授，他如愿地专门从事河外红移统计研究。

Although the first stars are too distant to be glimpsed directly , their light contributes to a diffuse fog of photons known as the extragalactic background light , which permeates the universe .

尽管这些最早的恒星离我们非常遥远以致使我们直接瞥见，可是它们所发射的光线却为我们提供了一种称为河外背景光的、在宇宙之间弥漫的散射光子烟雾。

We shall hardly even touch the captivating problems of modern extragalactic astronomy .

甚至几乎不涉及现代河外天文学中吸引人的课题。

By comparing the new gamma-ray results with theoretical models of how much light such stars should contribute to the extragalactic background , reimer and colleagues determined that formation of the first generation of stars peaked no earlier than 500 million years after the big bang .

对新的伽玛射线实验结果与这些恒星应对河外背景光提供多少光的理论模型相比较，雷蒙和他的同事们确定了的第一代恒星的形成高峰不会早于宇宙大爆炸后的5亿年。