给定多个星球的质量、初始位置、初始速度（位置和速度为二维矢量），该模型可以绘制它们的二维运动轨迹图。

使用指令 pip install -r requirements.txt 安装依赖包。

使用指令 python Main.py 运行模型。

Given the mass, initial position and speed of multiple stars (position and speed are two-dimensional vectors), the model can draw their two-dimensional motion trajectories.

Use the command pip install -r requirements.txt to install dependent packages.

Use the command python Main.py to run the model.