All the matter of the galaxy was originally a spherical cloud of gas from which stars were condensing out.
银河系中所有的物质最初都是球状气体云，恒星正是从中凝聚而成。
2
From earlier results using much less data, the positron cloud seemed to be spherical and centred on the centre of the galaxy.
从使用较少数据的早期结果来看，正电子云似乎是呈球状位于银河中心。
3
Globular clusters are nearly spherical groups of hundreds of thousands of stars bound by gravity. The stars in these clusters are among the oldest in the galaxy.