Universe Sandbox · Ultra HD

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)

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

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 . You can even create a "Tiny System" by

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) Building a story in is a unique way

Once your planets are in orbit, you can flesh out their history.