Universe Sandbox May 2026

Will it be a stable yellow dwarf like our Sun, or a volatile blue giant ?

You can even create a "Tiny System" by shrinking a star down to the size of a flashlight while keeping it hot enough to support life. 2. Build the Worlds (Planetary Composition)

Use the Habitable Zone view (shortcut 'H') to see where liquid water can exist. universe sandbox

In the , planets aren't just static spheres; they are made of 12 distinct materials , including iron, silicate, water, and hydrogen.

Every cosmic story needs a center. You can begin by adding a to an empty simulation. Will it be a stable yellow dwarf like

Here is how you can put together a story using the tools available in the simulation: 1. Set the Stage (The Star)

Building a story in is a unique way to explore the "what ifs" of the cosmos, whether you are recreating famous sci-fi worlds like Star Wars systems or simulating the future of our own Solar System . Build the Worlds (Planetary Composition) Use the Habitable

Adjust the axial tilt to create extreme seasons or "tidally lock" a planet so one side is always burning and the other is always frozen. 3. Add the Details (Moons, Rings, and Life)