Learning Orbital Mechanics by Building a Simple Python Simulator
Why this problem interested me
I have been wanting to learn more physics, especially space and asteroid-related topics, but I learn best when I can build something concrete. Orbital mechanics seemed like a good place to start because it connects a real physics idea to code, math, and visualization.
Rather than just reading about gravity and elliptical orbits, I wanted to see what happens when you model position, velocity, and acceleration over time.
Practical approach
- Start with a simple 2D simulation of gravity between two bodies.
- Represent position and velocity as vectors and update them step by step.
- Use Newton’s law of gravitation to calculate acceleration.
- Plot the resulting path to see whether the object falls inward, escapes, or settles into an orbit.
- Keep the first version intentionally simple before worrying about realism or numerical accuracy.
What I expect to learn
This project should help me understand the relationship between force, motion, and time-stepped simulation. I also want to get more intuition for why some starting conditions produce stable orbits while others do not.
As I build it out, I expect to learn more about numerical methods, simulation drift, and the difference between a physically correct equation and a stable implementation.
Result
This post is a placeholder while I build the first version of the simulator. The goal is to come back with plots, code snippets, mistakes, and a clearer explanation of what finally made orbital motion click for me.