star graph

例句：

1. 1. The astronomer used a star graph to plot the positions of stars in the sky.
   这位天文学家使用星图来标出天空中恒星的位置。
2. 2. The scientist conducted an analysis of the star graph to study the distribution of stars in the galaxy.
   科学家对星图进行了分析，以研究银河系中恒星的分布情况。
3. 3. The star graph showed that there were many more stars in the outer regions of the galaxy than expected.
   星图显示，银河系外围区域的恒星数量比预期的要多。