https://github.com/wendtpiotr/solar-system-gravitional-forces-simulation

A real-time simulation of planets, moons, and orbital mechanics using Newtonian physics and N-body gravitational interactions.
https://github.com/wendtpiotr/solar-system-gravitional-forces-simulation

game-development gravity nbody-gravity-simulation newton physics physics-simulation planets science solar-system

Last synced: 3 days ago
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A real-time simulation of planets, moons, and orbital mechanics using Newtonian physics and N-body gravitational interactions.

• Host: GitHub
• URL: https://github.com/wendtpiotr/solar-system-gravitional-forces-simulation
• Owner: wendtpiotr
• License: mit
• Created: 2025-10-21T11:14:16.000Z (9 months ago)
• Default Branch: main
• Last Pushed: 2025-10-21T11:44:46.000Z (9 months ago)
• Last Synced: 2026-04-22T08:41:33.587Z (3 months ago)
• Topics: game-development, gravity, nbody-gravity-simulation, newton, physics, physics-simulation, planets, science, solar-system
• Language: C#
• Homepage:
• Size: 60.6 MB
• Stars: 2
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# 🌌 Physics-Based Solar System Simulation







*A **real-time simulation** of planets, moons, and orbital mechanics using **Newtonian physics** and **N-body gravitational interactions**.*

---

## 🔬 Scientific Overview

This Unity project simulates celestial bodies based on **physics-based formulas**. It solves the **N-body problem** in real-time, allowing you to:

- ✅ Calculate **mutual gravitational forces** between multiple bodies  

- ✅ Predict **orbital paths** using **Euler integration**  

- ✅ Visualize **runtime orbit predictions** dynamically  

- ✅ Customize **planet and moon parameters**, including mass, radius, and initial velocity  

This system is ideal for **educational demonstrations**, research visualizations, or exploring classical mechanics phenomena such as **Mercury’s orbital precession**.

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## 🌟 Key Features

### Physics-Based Simulation

- Implements Newton’s law of universal gravitation:  

![Newton](https://github.com/user-attachments/assets/acf23792-27f3-4461-b199-76816a369b35)

- Computes **gravitational acceleration** between all bodies at each timestep.

- Updates **velocities and positions** in real-time using **Euler integration**.

- Supports **multiple interacting bodies**, including planets, moons, and artificial objects.

### **2. Orbit Prediction**

- Predicts **future trajectories** for each body.

- Visualizes predicted orbits with **LineRenderer**.

- Supports **individual body preview** or **all-body orbit display**.

### **3. Runtime Simulation**

- Bodies move in real-time according to **physical forces**.

- Adjustable **timeScale** to simulate faster or slower motion.

- Works in both **Editor** and **Build** for consistent results.

### **4. Customizable Bodies**

- Configure **mass, radius, initial velocity**, and parent-child relationships (for moons).  

- Moons automatically inherit **parent planet velocity** if assigned.  

- Orbit trails can be assigned **distinct vibrant colors** for clarity.

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## 🎬 Example Scenes



### 🌞 Solar System

Full solar system simulation with planets and orbit prediction.  



### 🌑 Two Moons

Realtime simulation of a planet with two moons showing gravitational interactions.  



### ☿ Mercury Precession

Demonstrates **precession of Mercury’s orbit** due to gravitational perturbations.  





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## ⚡ Getting Started

### **Requirements**

- Unity 2020.3 or higher  

- Compatible with both **Editor** and **Build** environments

### **Installation**

```bash

git clone https://github.com/yourusername/PhysicsSolarSystem.git