Python Pygame Solar System Simulation Tutorial

In this guide we build a simple solar‑system animation with Python and Pygame, showing how each planet and the moon can orbit the Sun while optionally playing background music.

Materials needed include a space background image and transparent PNGs for the Sun, Mercury, Venus, Earth, Moon, Mars, Jupiter, Saturn, Uranus, and Neptune.

1. Import required modules

import pygame
import sys
import math
from pygame.locals import *

2. Initialize Pygame and set up the display

size = width, height = 1206, 780
screen = pygame.display.set_mode(size)
pygame.display.set_caption("Solar System Simulation")
myfont = pygame.font.Font(None, 60)
clock = pygame.time.Clock()

3. Load images and define static elements

# Load background
background = pygame.image.load(r"path/to/background.png")
# Load planet images (example for Sun)
sun = pygame.image.load(r"path/to/sun.png")
# Load other planets similarly…

4. Define variables for orbital angles

roll_2 = roll_3 = roll_4 = roll_5 = roll_6 = roll_7 = roll_8 = 0
roll_e = roll_m = 0

5. Main loop – update angles, compute positions, and draw

while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            sys.exit()
    # Update orbital angles
    roll_3 += 0.077  # Mercury
    roll_2 += 0.069  # Venus
    roll_e += 0.060  # Earth
    roll_4 += 0.053  # Mars
    roll_5 += 0.045  # Jupiter
    roll_6 += 0.037  # Saturn
    roll_7 += 0.031  # Uranus
    roll_8 += 0.025  # Neptune
    roll_m += 0.2    # Moon around Earth
    # Compute positions (example for Mercury)
    pos_3_x = int(size[0]//2 + size[1]//8 * math.sin(roll_3))
    pos_3_y = int(size[1]//2 + size[1]//8 * math.cos(roll_3))
    # Draw background and planets
    screen.blit(background, (0, 0))
    screen.blit(pygame.transform.scale(sun, (27, 27)), (1090, 25))
    screen.blit(pygame.transform.scale(mercury, (8, 8)), (pos_3_x, pos_3_y))
    # ... repeat for other planets and the moon ...
    pygame.display.flip()
    clock.tick(50)

6. Optional: add background music

pygame.mixer.music.load('path/to/Victory.mp3')
pygame.mixer.music.play(-1, 40)
pygame.mixer.music.set_volume(0.5)

Running the script produces a window where the Sun stays near the center, each planet follows a circular orbit with different radii and speeds, and the Moon orbits the Earth, creating a simple yet illustrative solar‑system animation.