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 .
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 .
