photoelectric star photometer

例句：

1. 1. This photoelectric star photometer is used to measurethe brightness of stars.
   这个光电星体光度计用来测量恒星的亮度。
2. 2. The new photoelectric star photometerhas improved accuracy and reduced error.
   新型光电星体光度计提高了准确性并减少了误差。
3. 3. The photoelectric star photometeris a crucial tool for astronomers in their research.
   光电星体光度计是天文学家研究工作中不可或缺的工具。