へー。
>>>
For JPL's highest accuracy calculations, which are for interplanetary navigation, we use 3.141592653589793.
<<<
>How Many Decimals of Pi Do We Really Need? - Edu News | NASA/JPL Edu
https://www.jpl.nasa.gov/edu/news/2016/3/16/how-many-decimals-of-pi-do-we-really-need/
#golang の定数に関する言語仕様については以下の拙文をどうぞ(日頃小ネタを書き散らかしているとこういうときに便利w)
>リテラル定数
https://zenn.dev/spiegel/articles/20220904-literal-constants