天文系

罗伯特•史密斯是英格兰南部苏塞克斯大学天文系的荣誉高级讲师，他曾经测算，当太阳燃尽时，会膨胀成一个危险的“红色巨无霸”。

Robert Smith , emeritus reader in astronomy at the University of Sussex , southern England , previously calculated that as the Sun runs out of fuel , it will expand into a dangerous " red giant " .

利用月亮轨道周期和地球轨道周期的准公倍数（即天文气候周期系），借助68至95年前期洪水历史资料，推算后期10年以上逐年洪水变化。

According to the quasi-least common multiples between lunar orbit periods and the earth 's orbit periods ( i.e. Astro-climatic periods ), and using the flood records in earlier times ( 68-95 years ago ), the departure values of floods are estimated .

例如，如果天文学家发现太阳系外的一颗行星，除非它有某些特殊性质，不然这仅仅是多一份数据。

For example , if an astronomer finds another planet outside solar system , unless it has certain properties , it will just be another piece of data .

2006年一组天文学家指出银河系的质量是仙女座的2倍。而2009年的结论则表示二者质量持平。

In 2006 one group of astronomers figured the Milky Way was twice as massive as Andromeda . A 2009 estimate evened the score , calculating that the two galaxies are equal in mass .

针对我国天文大地网精度的现状，提出一种建立GPS网与天文大地网坐标系转换的网格转换方法。

This paper gives a method of coordinate transformation of GPS network and terrestrial network according to the present situation of our terrestrial network .