The Galaxy Jar

Swirl the stars. Create black holes. Witness cosmic beauty.
A pocket universe in your hands.

📖 Inspired by Real Stories

For conversations that never found their ending.

How to Use The Galaxy Jar

Click "Enter the Universe" and you'll be transported into a mesmerizing cosmic simulation—a dark void filled with thousands of glowing stars, swirling nebulae, and cosmic dust. This is your personal galaxy in a jar. Use your mouse or finger to drag across the screen and watch the stars swirl and dance in response to your movements, creating beautiful spiral patterns like a cosmic snow globe. Hold down your click or touch and a black hole will begin to form, pulling nearby stars into its gravitational pull with a deep, rumbling sound. The longer you hold, the stronger it grows. When you release, the black hole explodes in a brilliant supernova, sending stars scattering in all directions with a shower of light and sound. Occasionally, you'll see shooting stars streak across your galaxy. There's a sound toggle in the bottom right if you prefer silence. Play with the physics, create patterns, or just watch the stars drift—there's no right way to interact with your universe.

Why I Built This

I made this because I've always been fascinated by the idea that the universe is both impossibly vast and intimately knowable. As a kid, I'd collect things in jars—fireflies, marbles, colored sand—and shake them up just to watch the patterns they made. There was something meditative about holding a tiny world in my hands. When I learned about galaxies and how they spiral and collide over billions of years, I wanted to recreate that same feeling but with stars instead of sand.

This simulation is my attempt to give you that experience—a pocket universe you can interact with, swirl around, and reshape however you want. The physics aren't scientifically accurate, but they feel right: stars that flow like water, black holes that pull and explode, nebulae that glow in the background. I wanted something that's equal parts toy and meditation tool, where you can play with cosmic forces or just zone out and watch the stars drift. It's inspired by the simple joy of shaking a snow globe and seeing what patterns emerge, except instead of fake snow, you get fifty thousand stars responding to your every movement. Sometimes you just need to hold a galaxy in your hands and remember how beautiful chaos can be.

Tips for the Best Experience

Use headphones or speakers to hear the ambient space sounds, swirling tones, and supernova explosions—the audio makes the experience much more immersive.
Try dragging slowly in circular motions to create spiral galaxy patterns, or swipe quickly for chaotic bursts of stellar motion.
Hold down your click for different lengths of time—short holds create small black holes, while longer holds build massive gravitational forces before the supernova.
Dim your screen brightness and turn off surrounding lights for the most atmospheric experience—it really feels like staring into deep space.
There's no goal or objective. Some people treat it like a meditation tool, others like a physics sandbox. Experiment and see what feels right for you.
If the simulation feels overwhelming or the sounds are too intense, use the sound toggle button in the bottom right corner to enjoy it silently.